JP3898733B2 - Vehicle drive device - Google Patents

Description

  The present invention relates to a vehicle drive device that drives four wheels of a vehicle using an engine and an electric motor.

  As a conventional vehicle drive device, for example, as described in JP-A-7-151514, a drive battery is used, and a 12V alternator and an auxiliary machine 12V battery are used only on a low μ road that requires start assist. One that operates an electric motor in combination is known. Further, for example, as described in JP-A-7-231508, there is known a system for driving an electric motor by combining a 12V alternator and a 12V battery for auxiliary equipment.

JP-A-7-151514 Japanese Patent Laid-Open No. 7-231508

  However, in conventional systems that have a 12V generator or 12V auxiliary battery as the power source, the electrical energy that can be taken out of the 12V (auxiliary) battery is small, and the time that can be used as 4WD is very limited. Therefore, continuous climbing or the like requires a high power and a long time supply, so that there is a problem that sufficient performance cannot be exhibited.

  An object of the present invention is to provide a vehicle drive device capable of producing a sufficient driving force.

  (1) In order to achieve the above object, according to the present invention, one of the front and rear wheels of a vehicle is driven by an internal combustion engine that drives an auxiliary generator for generating electric power to be supplied to the auxiliary device of the vehicle. A drive device for a vehicle driven by an electric motor from the start of the vehicle until reaching the speed of vehicle travel by only the internal combustion engine, and is driven by the internal combustion engine to generate electric power, A drive high-output generator capable of supplying a higher power output than the auxiliary generator and a power output supplied from the drive high-output generator as inputs, and the drive high-output power generation The motor is driven by controlling the field current supplied to the high-power generator for driving based on information detected by various sensors of the motor and the electric motor directly driven by the power generation output supplied from the machine. For high output Control means for controlling the power generation output of the electric machine to control the driving force generated by the electric motor, and the high output power generator for driving is a field controlled based on information detected by various sensors of the vehicle. It is a dedicated machine for receiving a supply of magnetic current to change the power generation output and supplying it to the electric motor, and the electric motor receives only the power generation output from the high-power generator for driving as the input. From the start of the vehicle to the time when the vehicle travels only by the internal combustion engine, the power generation output of the high-power generator for driving is directly received and the driving power is generated. The control means for controlling the field current supplied to the generator is for driving the vehicle when the vehicle has a higher output speed than the vehicle when the output voltage of the driving high-output generator is when the vehicle starts. High power generator The output current of the high output power generator for driving is smaller than the force voltage and the output current of the high output power generator for driving is higher than the output current of the high output power generator for driving when the vehicle is traveling at a higher vehicle speed than the time of starting the vehicle. The driving high-output generator is increased so that the driving force of the electric motor when the vehicle starts is greater than the driving force of the electric motor when the vehicle travels at a higher vehicle speed than when the vehicle starts. The supplied field current is controlled.

  With this configuration, a sufficient driving force can be obtained by using a dedicated generator and electric motor.

  (2) Further, in order to achieve the above object, the present invention relates to one of the front and rear wheels of a vehicle by an internal combustion engine that drives an auxiliary generator for generating electric power to be supplied to the auxiliary device of the vehicle. A vehicle drive device that drives a wheel and drives the other wheel by an electric motor from the start of the vehicle until the vehicle travel speed is reached only by the internal combustion engine, and is driven by the internal combustion engine to generate electric power. A driving high-output generator capable of supplying a higher power generation output than the auxiliary power generator, and a power generation output supplied from the driving high-power generator as an input. By controlling the field current supplied to the high-power generator for driving based on the motor directly driven by the power generation output supplied from the output generator and information detected by various sensors of the vehicle For driving A control means for controlling the power generation output of the output generator to control the driving force generated by the electric motor, and a clutch capable of intermittently transmitting the driving force from the electric motor to the other wheel; The generator is a dedicated machine for receiving a supply of field current controlled based on information detected by various sensors of the vehicle, changing the power generation output and supplying it to the electric motor, Only the power generation output from the driving high-output generator is used as the input, and during the period from when the vehicle starts to the time when the vehicle travels only by the internal combustion engine, the driving high-output generator The control means that directly receives the generated output and generates the driving force and controls the field current supplied to the high-power generator for driving is the output of the high-power generator for driving when the vehicle starts. Voltage, vehicle The output voltage of the high-power generator for driving is smaller than the output voltage of the high-power generator for driving when the vehicle has a higher vehicle speed than the time of starting, and the output current of the high-power generator for driving is less The driving power of the electric motor when the vehicle starts is greater than the output current of the high-power generator for driving when the vehicle is traveling at a high vehicle speed, and the vehicle driving speed is higher than when the vehicle is starting. The field current supplied to the high-power generator for driving is controlled so as to be larger than the driving force of the electric motor, and when the vehicle power reaches the speed of vehicle traveling by only the internal combustion engine, The clutch is turned off.

  With this configuration, a sufficient driving force can be obtained by using a dedicated generator and electric motor.

  (3) In order to achieve the above object, the present invention relates to one of the front and rear wheels of a vehicle by an internal combustion engine that drives an auxiliary generator for generating electric power to be supplied to the auxiliary device of the vehicle. A vehicle drive device that drives a wheel and drives the other wheel by an electric motor from the start of the vehicle until the vehicle travel speed is reached only by the internal combustion engine, and is driven by the internal combustion engine to generate electric power. A driving high-output generator capable of supplying a higher power generation output than the auxiliary power generator, and a power generation output supplied from the driving high-power generator as an input. By controlling the field current supplied to the high-power generator for driving based on the motor directly driven by the power generation output supplied from the output generator and information detected by various sensors of the vehicle For driving Control means for controlling the power generation output of the output generator to control the driving force generated by the motor, and the high-power generator for driving is controlled based on information detected by various sensors of the vehicle. Is a dedicated machine for receiving the supplied field current to change the power generation output and supplying it to the motor, and the motor receives only the power generation output from the driving high power generator as the input. In the period from the start of the vehicle to the time when the vehicle travel speed is reached only by the internal combustion engine, the power generation output of the high-power generator for driving is directly received and the driving force is generated. The control means for controlling the field current supplied to the high-output generator is configured such that the output voltage of the driving high-output generator when the vehicle starts is the vehicle when the vehicle is traveling at a higher vehicle speed than when the vehicle is started. High output for driving The output current of the high-power generator for driving when the vehicle is traveling is lower than the output voltage of the machine and the output current of the high-power generator for driving when the vehicle starts is faster than the speed of starting the vehicle And the driving force of the electric motor when the vehicle starts is larger than the driving force of the electric motor when the vehicle travels at a higher vehicle speed than when the vehicle starts, and then the output voltage is increased, and The field current supplied to the high-power generator for driving is controlled so that the output current is reduced and the driving force of the electric motor is reduced.

  With this configuration, a sufficient driving force can be obtained by using a dedicated generator and electric motor.

  (4) Further, in order to achieve the above object, the present invention provides an internal combustion engine for driving an auxiliary generator for generating electric power to be supplied to an auxiliary machine of a vehicle, by using one of the front and rear wheels of the vehicle. A vehicle drive device that drives a wheel and drives the other wheel by an electric motor from the start of the vehicle until the vehicle travel speed is reached only by the internal combustion engine, and is driven by the internal combustion engine to generate electric power. A driving high-output generator capable of supplying a higher power generation output than the auxiliary power generator, and a power generation output supplied from the driving high-power generator as an input. By controlling the field current supplied to the high-power generator for driving based on the motor directly driven by the power generation output supplied from the output generator and information detected by various sensors of the vehicle For driving A control means for controlling the power generation output of the output generator to control the driving force generated by the electric motor, and a clutch capable of intermittently transmitting the driving force from the electric motor to the other wheel; The generator is a dedicated machine for receiving a supply of field current controlled based on information detected by various sensors of the vehicle, changing the power generation output and supplying it to the electric motor, Only the power generation output from the driving high-output generator is used as the input, and during the period from when the vehicle starts to the time when the vehicle travels only by the internal combustion engine, the driving high-output generator The control means that directly receives the generated output and generates the driving force and controls the field current supplied to the high-power generator for driving is the output of the high-power generator for driving when the vehicle starts. Voltage, vehicle The output voltage of the high-power generator for driving is smaller than the output voltage of the high-power generator for driving when the vehicle has a higher vehicle speed than the time of starting, and the output current of the high-power generator for driving when starting the vehicle is higher than that when starting the vehicle. The driving power of the electric motor when the vehicle starts is greater than the output current of the high-power generator for driving when the vehicle is traveling at a high vehicle speed, and the vehicle driving speed is higher than when the vehicle is starting. Field current supplied to the high-power generator for driving so that the driving force of the electric motor becomes smaller, and then the output voltage is increased and the output current is reduced to reduce the driving force of the electric motor. And the clutch is turned off when the vehicle power reaches the speed of vehicle travel by only the internal combustion engine.

  With this configuration, a sufficient driving force can be obtained by using a dedicated generator and electric motor.

  According to the present invention, a sufficient driving force can be generated in the vehicle drive device.

  Hereinafter, the configuration and operation of a vehicle drive device according to an embodiment of the present invention will be described with reference to FIGS. First, the overall configuration of a four-wheel drive vehicle using the vehicle drive apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a system configuration diagram showing the overall configuration of a four-wheel drive vehicle using a vehicle drive apparatus according to an embodiment of the present invention, using FIG.

  The four-wheel drive vehicle 10 includes an engine 20 and a DC motor 30. The driving force of the engine 20 is transmitted to the front wheels 26A and 26B via the transmission 22 and the first axles 24A and 24B, and drives the front wheels 26A and 26B. The driving force of the DC motor 30 is transmitted to the rear wheels 36A and 36B via the clutch 32, the differential gear 33 and the second axles 34A and 34B, and drives the rear wheels 36A and 36B. When the differential gear 33 and the clutch 32 are connected, the rotational force of the DC motor 30 is transmitted to the rear wheel shafts 34A and 34B via the clutch 32 and the differential gear 33 to drive the rear wheels 36A and 36B. When the clutch 32 is disengaged, the DC motor 30 is mechanically disconnected from the rear wheels 36A and 36B, and the rear wheels 36A and 36B do not transmit driving force to the road surface. The DC motor 30 is, for example, a DC shunt motor or a separately excited DC motor that can be easily switched between forward and reverse rotation.

  In the above description, the front wheels 26A and 26B are driven by the engine 20 and the rear wheels 36A and 36B are driven by the DC motor 30. However, the front wheels are driven by the DC motor and the rear wheels 36A and 36B are driven by the DC motor. The wheels may be driven by an engine, and the present invention can also be applied to a vehicle having six or more wheels such as a truck or a towing vehicle such as a trailer.

  In the engine room, an auxiliary generator (ALT1) 40 and an auxiliary battery 42 for performing a normal charging power generation system are arranged, and the output of the auxiliary generator 40 belt-driven by the engine 20 is the auxiliary battery. 42 is accumulated. Further, in the vicinity of the auxiliary generator 40, a driving high output generator (ALT 2) 44 driven by the engine 20 is disposed. The DC motor 30 is driven by the output of the driving high-output generator 44. The auxiliary generator 40 is a general generator of about 12 V, 2 kW, for example, and the driving high-output generator 44 is a generator that can obtain a higher output than the auxiliary generator 40. For example, it is a generator of about 36V, 6kW.

  The output of the engine 20 is controlled by an electronic control throttle 52 that is driven by a command from an engine control unit (ECU) 50. The electronic control throttle 52 is provided with an accelerator opening sensor 54 to detect the accelerator opening. In the case where an accelerator pedal and throttle of a mechanical link are used instead of the electronic control throttle, an accelerator opening sensor can be provided on the accelerator pedal. The ECU 50 controls the transmission 22. The transmission 22 is an automatic transmission, and is automatically controlled so that the gear ratio selected by the select lever 23 is obtained. The position of the select lever 23 is detected by a gear position detection sensor 25. As the transmission 22, a manual transmission may be used.

  Anti-brake brake (ABS) actuators controlled by an anti-lock brake (ABS) control unit 55 include brakes 28A, 28B, 38A, and 38B provided on the front wheels 26A and 26B and the rear wheels 36A and 36B. 29A, 29B, 39A, 39B are provided. The front wheels 26A, 26B and the rear wheels 36A, 36B are provided with rotation sensors 56A, 56B, 58A, 58B for detecting the rotation speed and the rotation direction. The rotation sensors 56A, 56B, 58A, and 58B are provided for each wheel, but may be arranged on one or both of the front wheel shaft and the rear wheel shaft.

  The drive generator output voltage control circuit (GCU) 60 calculates the vehicle speed based on the rotation speeds of the wheels 26A, 26B, 36A, and 36B detected by the rotation sensors 56A, 56B, 58A, and 58B, and the calculated vehicle speed. Based on the above, the drive high-output generator 44 and the DC motor 30 are controlled. Details of the control by the MCU 60 will be described later with reference to FIG.

  Next, the configuration of the vehicle drive apparatus according to the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing a configuration of the vehicle drive device according to the embodiment of the present invention, and shows an example of a circuit configuration related to power supply and control. The same reference numerals as those in FIG. 1 indicate the same parts. In addition, in the connection between the blocks in the figure, the solid line indicates the power supply connection, and the broken line indicates the control-related connection.

  A drive generator output voltage control circuit (GCU) 60 includes information on the rotational speed and direction of the wheels 26A, 26B, 36A, and 36B detected by the rotation sensors 56A, 56B, 58A, and 58B, and an accelerator opening sensor 54. The information on the accelerator opening detected by the above and the information on the gear position detected by the gear position detection sensor 25 are input.

  The GCU 60 controls the output voltage of the high output generator 44 by outputting a command value of the output voltage to the drive high output generator (ALT2) 44 on the basis of these pieces of information. 30 is controlled. Further, the GCU 60 directly controls the DC motor 30 by controlling the field current flowing through the field winding 31 of the DC motor 30, and controls the DC motor 30 by the high-output generator 44. It is trying to improve the response drop by.

  A driving generator output voltage control circuit (GCU) 60 includes an I / O circuit 61, an A / D converter 62, a microprocessor (MPU) 63, an I / O circuit 64, an H bridge driver 65, And an H-bridge circuit 66. The gear position information detected by the gear position detection sensor 25 is taken into the MPU 63 via the I / O circuit 61. Further, the rotational speed and rotational direction information of the wheels 26A, 26B, 36A, and 36B detected by the rotation sensors 56A, 56B, 58A, and 58B, and the accelerator opening information detected by the accelerator opening sensor 54 are A / The data is taken into the MPU 63 via the D converter 62. The MPU 63 includes a CPU and a memory for storing a motor control program and data. Based on the input information, the MPU 63 calculates the vehicle speed, calculates the output voltage value of the drive high-output generator 44, The output voltage value which is supplied from the O circuit 64 to the driving high output generator (ALT2) 44 and is generated is controlled. In addition, the MPU 63 causes the H bridge circuit 66 to flow the field winding 31 of the DC motor 30 via the I / O circuit 64 and the H bridge driver 65 so that the characteristics of the DC motor 30 meet the required values. Adjust the field current. When the vehicle moves backward, the H bridge circuit 66 allows a field current to flow in the direction opposite to the normal rotation, thereby obtaining the same backward driving force as when the vehicle is moving forward. Further, the MPU 63 generates an on / off signal for the clutch 32 and supplies it to the clutch 32 from the I / O circuit 64.

  In the above description, each sensor signal is directly input to the drive generator output voltage control circuit 60, but the sensor amount is measured by another control unit (for example, the ECU 50 or the ABS control unit 55). ) Through an in-vehicle LAN (CAN) bus.

  The auxiliary battery 42 is a 12V battery, and constitutes a normal charge / discharge system between the auxiliary generator 40 and various electric loads for the 12V power source. The field-side power of the DC motor 30 and the driving high-output generator 44 is supplied from the auxiliary generator 40 and the auxiliary battery 42. By providing two power supply systems, control is possible by two methods: a method of controlling the field current of the driving high-output generator 44 and a method of controlling the field current of the DC motor 30. For example, when the required rotational speed of the electric motor is low and the required torque is high, such as when starting the vehicle, the electric current of the high output generator 44 for driving is set to a value that increases so that the electric motor has a low rotation and high torque. Output. Further, when the vehicle is traveling, if the required rotational speed of the electric motor is high and the required torque is low, it can be handled by setting the output electric voltage value of the driving high-output generator 44 to a value that increases. Furthermore, by reducing the field current of the DC motor 30, it is possible to increase the rotation speed of the motor while improving the responsiveness during vehicle travel. Further, when the torque distribution request value is higher for the front wheel 26 than for the rear wheel 36, the field current value of the driving high-output generator 44 can be lowered to make the torque distribution between the front wheel 26 and the rear wheel 36 variable. .

  Further, the power line of the clutch 32 is connected to the auxiliary battery 42 and is controlled by the MPU 63 to control the engagement / disengagement of the clutch 32, thereby depending on the power generation of the driving high-output generator 44 whose power generation constantly changes. Without this, when the four-wheel drive function is not necessary, the mechanical connection between the rear wheels 36A and 36B and the DC motor 30 can be forcibly disconnected. For example, when the vehicle speed reaches 20 km / h, the brush 32 of the DC motor 30 can be reduced as compared with a system operating in the entire vehicle speed region by turning off the clutch 32 and using only the front wheel drive system. In addition, since the DC motor 30 is not used in the state where the clutch 32 is disengaged, the driving high-output generator 44 can be switched with a switch and used as a power source for a charging device or other auxiliary machines.

  Further, by using the motor 30 as a generator at high speeds or downhills, and providing a facility for charging or consuming power generated by the motor 30 in the vehicle, a braking force such as regenerative braking and power generation braking can be obtained. .

  Next, the operation of the vehicle drive apparatus according to the present embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a system block diagram of a control system for a vehicle drive device according to an embodiment of the present invention, and FIG. 4 is a characteristic diagram of a high-power generator used in the vehicle drive device according to an embodiment of the present invention. In FIG. 3, the same reference numerals as those in FIGS. 1 and 2 indicate the same parts.

  As shown in FIG. 3, a wheel driven through the transmission 22 by the driving force of the engine 20 is, for example, a front wheel 26, and a wheel driven by the DC motor 30 is a rear wheel 36.

  Here, the content of control processing of the GCU 60 will be described. In step s10, the GCU 60 calculates the vehicle speed by performing processing such as setting the vehicle speed on the low speed side based on the rotational speed information of the front and rear axles input from the rotation sensors 56A, 56B, 58A, and 58B.

  Next, in step s20, the GCU 60 calculates the motor driving torque that is required in accordance with the traveling state determined in step s10. Next, in step s30, the GCU 60 calculates a voltage command value to the drive generator 44 so as to obtain the calculated electric motor drive torque, and outputs the voltage command value to the drive generator 44. The driving generator 44 internally performs feedback control so that the output voltage becomes a command value, and outputs the output voltage V to the DC motor 30. With this voltage V, the actual torque of the DC motor 30 is input to the rear wheel 36, and the actual wheel speed is generated, and feedback control of the entire system is performed.

  Next, the characteristics of the high-power generator will be described with reference to FIG. In FIG. 4, the output voltage is the output voltage of the high-power generator 44 and can be considered as the input voltage of the DC motor 30 except for the wiring resistance.

  When the required torque is high and the vehicle speed is low, such as when starting the vehicle or escaping from the saddle, use the points of V2 and I2 where the current value to the motor 30 is high and the voltage value is relatively low in FIG. The output of the generator 44 is controlled. Further, when the vehicle speed is low, for example, at 15 to 20 km / h, a certain amount of torque is transmitted to the rear wheel 36, and the motor 30 is synchronized with the rotational speed of the rear wheel 36 via the speed reducer. The output of the generator 44 is controlled so that the points V1 and I1 having a relatively low voltage value and a relatively high voltage value are used.

  Further, when there is a required power value higher than the characteristics of FIG. 4, by controlling the field currents of the generator 44 and the motor 30 within the allowable range of the generator 44 and the motor 30, and the battery 42, It is possible to drive the electric motor 30 in a range of further high output and low output.

As described above, according to the present embodiment, since a sufficient driving force can be secured by directly driving the electric motor with the dedicated generator, a driving force performance comparable to that of the so-called mechanical 4WD can be secured. . In addition, the advantages of the original electric four-wheel drive (no propeller shaft required, the vehicle floor shape can be made flat, etc.) can be provided. Furthermore, since a battery is not required, a simpler, more efficient and sufficient performance drive device is realized, such as lower costs, more advantageous layout in the vehicle, and no need to replace battery maintenance. Can do.

1 is a system configuration diagram showing an overall configuration of a four-wheel drive vehicle using a vehicle drive device according to an embodiment of the present invention. It is a block diagram which shows the structure of the vehicle drive device by one Embodiment of this invention. It is a system block diagram of the control system of the vehicle drive device by one Embodiment of this invention. It is a characteristic view of the high output generator used for the vehicle drive device by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Four-wheel drive vehicle 20 ... Engine 25 ... Gear position detector 26 ... Front wheel 28, 38 ... Brake 30 ... DC motor 31 ... Electric motor field winding 32 ... Clutch 36 ... Rear wheel 40 ... Auxiliary generator 42 ... Auxiliary battery 44 ... high power generator 50 for driving ... engine control unit 54 ... accelerator opening sensor 55 ... ABS control unit 56, 58 ... rotation sensor 60 ... generator output voltage control circuit for driving

Claims (4)

One of the front and rear wheels of the vehicle is driven by an internal combustion engine that drives an auxiliary generator for generating electric power to be supplied to the auxiliary device of the vehicle, and the other wheel is moved from the start of the vehicle to the internal combustion engine. A vehicle drive device that is driven by an electric motor until the speed of vehicle travel by only the engine is reached,
A high-output generator for driving that is driven by the internal combustion engine to generate electric power and is capable of supplying a higher power output than the auxiliary generator;
The motor that is directly driven by the power generation output supplied from the driving high-power generator, with the power generation output supplied from the driving high-power generator as an input,
Based on the information detected by various sensors of the vehicle, the field output supplied to the high-power generator for driving is controlled to control the power generation output of the high-power generator for driving, and the electric motor Control means for controlling the driving force to be generated,
The high-output generator for driving is a dedicated machine for receiving supply of a field current controlled based on information detected by various sensors of the vehicle, changing the generated output and supplying the electric motor to the electric motor. ,
The motor is
Only the power generation output from the high-power generator for driving is the input,
From the start of the vehicle to the time when the vehicle travels only by the internal combustion engine, the power output of the high-power generator for driving is directly received to generate driving force,
The control means for controlling the field current supplied to the high-power generator for driving is configured such that the output voltage of the high-power generator for driving when the vehicle starts is running in a vehicle whose vehicle speed is higher than that when starting the vehicle. The drive when the vehicle is traveling, the output voltage of the high-power generator for driving is lower than the output voltage of the high-power generator for driving at the time, and the output current of the high-output power generator for driving when the vehicle starts is faster than the time of starting the vehicle So that the driving force of the electric motor when the vehicle starts is larger than the driving force of the electric motor when the vehicle travels at a higher vehicle speed than when the vehicle starts. In addition, the vehicle drive device controls the field current supplied to the high-power generator for driving. One of the front and rear wheels of the vehicle is driven by an internal combustion engine that drives an auxiliary generator for generating electric power to be supplied to the auxiliary device of the vehicle, and the other wheel is moved from the start of the vehicle to the internal combustion engine. A vehicle drive device that is driven by an electric motor until the speed of vehicle travel by only the engine is reached,
A high-output generator for driving that is driven by the internal combustion engine to generate electric power and is capable of supplying a higher power output than the auxiliary generator;
The motor that is directly driven by the power generation output supplied from the driving high-power generator, with the power generation output supplied from the driving high-power generator as an input,
Based on the information detected by various sensors of the vehicle, the field output supplied to the high-power generator for driving is controlled to control the power generation output of the high-power generator for driving, and the electric motor Control means for controlling the driving force to be generated;
A clutch capable of intermittently transmitting the driving force from the electric motor to the other wheel,
The high-output generator for driving is a dedicated machine for receiving supply of a field current controlled based on information detected by various sensors of the vehicle, changing the generated output and supplying the electric motor to the electric motor. ,
The motor is
Only the power generation output from the high-power generator for driving is the input,
From the start of the vehicle to the time when the vehicle travels only by the internal combustion engine, the power output of the high-power generator for driving is directly received to generate driving force,
The control means for controlling the field current supplied to the high-power generator for driving is configured such that the output voltage of the high-power generator for driving when the vehicle starts is running in a vehicle whose vehicle speed is higher than that when starting the vehicle. The drive when the vehicle is traveling, the output voltage of the high-power generator for driving is lower than the output voltage of the high-power generator for driving at the time, and the output current of the high-output power generator for driving when the vehicle starts is faster than the time of starting the vehicle So that the driving force of the electric motor when the vehicle starts is larger than the driving force of the electric motor when the vehicle travels at a higher vehicle speed than when the vehicle starts. To control the field current supplied to the high-power generator for driving,
The vehicle drive device characterized in that the clutch is turned off when the vehicle power reaches the speed of vehicle travel by only the internal combustion engine. One of the front and rear wheels of the vehicle is driven by an internal combustion engine that drives an auxiliary generator for generating electric power to be supplied to the auxiliary device of the vehicle, and the other wheel is moved from the start of the vehicle to the internal combustion engine. A vehicle drive device that is driven by an electric motor until the speed of vehicle travel by only the engine is reached,
A high-output generator for driving that is driven by the internal combustion engine to generate electric power and is capable of supplying a higher power output than the auxiliary generator;
The motor that is directly driven by the power generation output supplied from the driving high-power generator, with the power generation output supplied from the driving high-power generator as an input,
Based on the information detected by various sensors of the vehicle, the field output supplied to the high-power generator for driving is controlled to control the power generation output of the high-power generator for driving, and the electric motor Control means for controlling the driving force to be generated,
The high-output generator for driving is a dedicated machine for receiving supply of a field current controlled based on information detected by various sensors of the vehicle, changing the generated output and supplying the electric motor to the electric motor. ,
The motor is
Only the power generation output from the high-power generator for driving is the input,
From the start of the vehicle to the time when the vehicle travels only by the internal combustion engine, the power output of the high-power generator for driving is directly received to generate driving force,
The control means for controlling the field current supplied to the high-power generator for driving is configured such that the output voltage of the high-power generator for driving when the vehicle starts is running in a vehicle whose vehicle speed is higher than that when starting the vehicle. The driving when the vehicle is traveling, the output voltage of the driving high-output generator is lower than the output voltage of the driving high-output generator at the time, and the output current of the driving high-output generator at the time of starting of the vehicle is higher than the speed of starting of the vehicle The driving force of the electric motor when the vehicle starts is greater than the driving force of the electric motor when the vehicle travels at a higher vehicle speed than when the vehicle starts, Thereafter, the vehicle current is controlled by controlling the field current supplied to the high-output generator for driving so that the output voltage is increased and the output current is decreased to reduce the driving force of the motor. Location. One of the front and rear wheels of the vehicle is driven by an internal combustion engine that drives an auxiliary generator for generating electric power to be supplied to the auxiliary device of the vehicle, and the other wheel is moved from the start of the vehicle to the internal combustion engine. A vehicle drive device that is driven by an electric motor until the speed of vehicle travel by only the engine is reached,
A high-output generator for driving that is driven by the internal combustion engine to generate electric power and is capable of supplying a higher power output than the auxiliary generator;
The motor that is directly driven by the power generation output supplied from the driving high-power generator, with the power generation output supplied from the driving high-power generator as an input,
Based on the information detected by various sensors of the vehicle, the field output supplied to the high-power generator for driving is controlled to control the power generation output of the high-power generator for driving, and the electric motor Control means for controlling the driving force to be generated;
A clutch capable of intermittently transmitting the driving force from the electric motor to the other wheel,
The high-output generator for driving is a dedicated machine for receiving supply of a field current controlled based on information detected by various sensors of the vehicle, changing the generated output and supplying the electric motor to the electric motor. ,
The motor is
Only the power generation output from the high-power generator for driving is the input,
From the start of the vehicle to the time when the vehicle travels only by the internal combustion engine, the power output of the high-power generator for driving is directly received to generate driving force,
The control means for controlling the field current supplied to the high-power generator for driving is configured such that the output voltage of the high-power generator for driving when the vehicle starts is running in a vehicle whose vehicle speed is higher than that when starting the vehicle. The drive when the vehicle is traveling, the output voltage of the high-power generator for driving is lower than the output voltage of the high-power generator for driving at the time, and the output current of the high-output power generator for driving when the vehicle starts is faster than the time of starting the vehicle The driving force of the electric motor when the vehicle starts is greater than the driving force of the electric motor when the vehicle is traveling at a higher vehicle speed than when the vehicle starts, Thereafter, the field voltage supplied to the high-output generator for driving is controlled so that the output voltage is increased and the output current is reduced, so that the driving force of the electric motor is reduced.
The vehicle drive device characterized in that the clutch is turned off when the vehicle power reaches the speed of vehicle travel by only the internal combustion engine.

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