JPH0144893B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a diesel engine, and in particular, detects the loaded weight of a vehicle and optimally controls the engine maximum load and engine speed according to the loaded weight by a computer, The present invention relates to a control device that can obtain optimal power performance and low fuel consumption.

Conventionally, in vehicles equipped with diesel engines, the engine was controlled by simply detecting the engine speed and load and changing the positions of the speed control lever and load lever of the fuel injection pump governor, regardless of the vehicle's loading capacity. I was just doing it. As a result, excessive power performance is obtained when the vehicle is empty, resulting in poor fuel efficiency and the need to constantly pay attention to the detection results of the engine rotation speed and engine load, resulting in the disadvantage of being complicated.

The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to detect both the load capacity and engine speed of a vehicle using sensors, and to transmit the detection results to a computer. The purpose of this system is to input data into a computer and use a computer to select characteristic values that match the preset load capacity, thereby regulating the movable range of the speed control lever and load lever of the fuel injection pump. Therefore, the objective is to control the diesel engine so that optimal power performance can be obtained depending on the load capacity of the vehicle. Another purpose is to improve fuel efficiency by optimizing the power performance of the vehicle when the vehicle is empty, and to eliminate the need to pay attention to the detection results of engine speed and engine load.

In short, the present invention provides a vehicle load amount sensor, an engine rotation speed sensor, an electronic fixed storage device that stores characteristic values such as engine rotation speed and engine load limit values commensurate with the load weight of the vehicle, and a central information processing device that receives the output signals of the quantity sensor and the engine rotation speed sensor, selects an optimum value from the characteristic values of the electronic fixed storage device, and sends out a control signal regarding the maximum engine rotation speed and the maximum engine load; a first actuator to which a control signal relating to the maximum engine load is input from a central information processing unit; a second actuator to which a control signal relating to the maximum engine rotation speed is input; and a fuel injection pump connected to the first actuator. an engine maximum load regulating member that regulates the movable range of a load lever of the governor; and an engine maximum load regulating member that regulates the movable range of a speed control lever that is connected to the second actuator and is operated independently of the governor load lever. a rotation speed regulating member, in which the first actuator causes the engine maximum load regulating member to protrude relative to the load lever in accordance with the magnitude of the loaded weight of the vehicle; The actuator causes the maximum engine speed regulating member to protrude relative to the speed control lever in accordance with the size of the loaded weight, so that the maximum engine output or maximum engine speed commensurate with the loaded weight of the vehicle can be obtained. The invention is characterized in that it is configured to control.

The present invention will be explained below based on embodiments shown in the drawings. A diesel engine control device 1 according to the present invention includes a vehicle load sensor 2, an engine rotation speed sensor 3, an electronic fixed storage device ROM4, a central information processing device CPU5, and a servo motor which is an example of a first actuator. It includes a motor 6, a servo motor 7 which is an example of a second actuator, a maximum engine load regulating member 8, and a maximum engine speed regulating member 9.

The vehicle load sensor 2 is attached to the vehicle suspension (not shown), etc., and is configured to detect the total weight of the vehicle and input an output signal 2a to the CPU 8. , detects the engine speed and inputs an output signal 3a to the CPU 5. The ROM 4 electronically stores characteristic values such as engine speed and engine load limit values commensurate with the vehicle's loading capacity.
The CPU 5 can select and read out the highest value as necessary.

The CPU 5 receives output signals 2a and 3a from the load sensor 2 and the engine speed sensor 3, and
Optimum values are selected from the characteristic values of the ROM 4, and control signals 6a and 7a regarding the maximum engine load and maximum engine speed are sent out, respectively.
The servo motor 6 is configured to receive a control signal 6a related to the maximum engine load from the CPU 5, and the servo motor 7 is configured to receive a control signal 7a related to the maximum engine speed. The engine maximum load regulating member 8 is connected to the servo motor 6 and is adapted to regulate the movable range of the load lever 12 of the all-speed governor 11 of the fuel injection pump 10, and the threaded portion 8a is screwed into the fixed member 13. A groove 8b is formed at one end of the servo motor 6, and a flat plate portion 14a formed on the rotating shaft 14 of the servo motor 6 is slidably inserted into the groove. The engine maximum rotation speed regulating member 9 is connected to the servo motor 7 and is adapted to regulate the movable range of the speed control lever 15 of the governor 11. A groove 9b is formed in the groove, and a flat plate portion 17 formed on the rotating shaft 17 of the servo motor 7 is formed in the groove.
a is slidably inserted.

Further, the CPU 5 is configured so that a manual control release signal 20 can be inputted to the CPU 5 so that the conventional power performance independent of the vehicle's payload can be obtained as needed.

The present invention is configured as described above, and its operation will be explained below. When starting the engine, it is necessary to supply the maximum amount of fuel, but the engine speed sensor 3 detects that the engine speed is 0, and the output signal 3a is
Since the input is input to the CPU 5, the CPU reads out the characteristic value that should maximize the fuel injection amount from the ROM 4 and sends out a control signal 6a. It rotates counterclockwise when viewed from the right, the engine maximum load regulating member 8 moves back the maximum amount, and the governor load lever 1
2 can be rotated by the maximum amount in the direction of arrow B, the maximum amount of fuel is injected, and the engine starts smoothly.

When the engine starts, the engine rotation speed sensor 3 detects idling rotation and output signal 3a is output.
Input to CPU5. In this case, if the vehicle is empty, this fact is detected by the load sensor 2, and its output signal 2a is input to the CPU 5, so the servo motor 6 is activated by the control signal 6a from the CPU 5. In FIG. 2, the restricting member 8 rotates clockwise to appropriately protrude, restricting the movable range of the load lever 12, and saving fuel by preventing excessive power performance from being obtained during driving.

In this case, if the vehicle is loaded with the maximum load, the control signal 6a from the CPU 5 causes the regulating member 8 to remain retracted by the maximum amount, thereby achieving maximum power performance. In this case, while the vehicle is running, both output signals 2a and 3a are sequentially input to the CPU, so the CPU also sends out the control signal 7a, so that the maximum rotational speed of the engine according to the load capacity of the vehicle is controlled. Servo motor as obtained 7
is rotated to move the regulating member 9 forward or backward to regulate the movable range of the speed control lever 15 in the direction of arrow C. This results in an optimal maximum rotational speed.

That is, the servo motor 6 causes the engine maximum load regulating member 8 to protrude with respect to the load lever 12 in accordance with the size of the loaded weight of the vehicle, and independently from this, the servo motor 7 causes the engine maximum rotation speed regulating member 9 to protrude. is projected from the speed control lever 15 according to the size of the loaded weight, and is controlled so that the maximum engine output or the maximum engine rotation speed commensurate with the loaded weight of the vehicle is obtained.

Therefore, when the loaded weight is large and the vehicle speed is high, the protrusion amount of the maximum engine load regulating member 8 and the maximum engine rotation speed regulating member 9 are both minimized, and when the loaded weight is small and the vehicle speed is high, In this case, the amount of protrusion of the maximum engine load regulating member 8 is increased, and conversely, the amount of protrusion of the maximum engine speed regulating member 9 is controlled to be decreased.

Furthermore, when the loaded weight is large and the speed of the vehicle is low, the amount of protrusion of the maximum engine load regulating member 8 becomes small, and the amount of protrusion of the maximum engine speed regulating member 9 is determined by the torque required by the vehicle wheels, that is, the transmission. It will be changed as appropriate depending on the gear position of the transmission. Further, when the loaded weight is small and the speed of the vehicle is also low, the protrusion amounts of the maximum engine load regulating member 8 and the maximum engine speed regulating member 9 are both controlled to be maximum.

Further, 9c is a fixed stopper attached to the fixed member 16, and 8c is a fixed stopper attached to the fixed member 13, which are used to limit the maximum permissible positions of the speed control lever 15 and the load lever 12, respectively. Servo motor 6,
The structure is designed to ensure vehicle safety even if actuator 7 etc. fails.

When the vehicle is actually driven, for example, in order to keep the speed control lever 15 at maximum rotation at all times, the spring 18 is brought into contact with the threaded portion 9a of the stopper, and the lever is connected to an accelerator pedal (not shown). 19 and load lever 1
2 and run by controlling the load.

Conversely, it is also possible to travel by always setting the load lever 12 at the maximum load position and connecting the speed control lever 15 to the accelerator pedal. Whichever method is used, the maximum engine speed and maximum load can be maintained at optimal values.

Since the present invention is configured and operates as described above, it detects both the vehicle load amount and engine rotation speed using sensors, inputs the detection results into a computer, and sets a preset load amount. It is possible to control the movable range of the speed control lever and load lever of the fuel injection pump by selecting characteristic values commensurate with the vehicle load using a computer. It is possible to obtain effects that can be controlled. In addition, since the power performance of the vehicle when empty can be set to the optimal value, fuel efficiency can be improved, and there is no need to pay attention to the engine speed and engine load detection results as in the conventional case. This has the effect of reducing the burden on people.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention; FIG. 1 is a block circuit diagram of the device of the present invention, FIG. 2 is a schematic front view showing a device for regulating the movable range of the speed control lever and load lever of the fuel injection pump, and FIG. FIG. 3 is a partial front view showing the connection structure between the rotating shaft of the servo motor and the engine maximum load regulating member, and FIG. 4 is a vertical sectional view taken in the direction of the - arrow in FIG. 1 is a diesel engine control device, 2 is a vehicle load sensor, 2a is an output signal from the sensor, 3 is an engine rotation speed sensor, 3a is an output signal from the sensor, 4 is an electronic fixed storage device
ROM, 5 is a central information processing unit CPU, 6 is a servo motor which is an example of a first actuator, 6a is a control signal from the CPU to the servo motor,
7 is a servo motor which is an example of a second actuator, 7a is a control signal from the CPU to the servo motor, 8 is an engine maximum load regulating member, 9 is an engine maximum rotation speed regulating member, 10 is a fuel injection pump, 11 is an oar A speed type governor, 12 a load lever, and 15 a speed control lever.

Claims (1)

[Claims] 1. A vehicle load sensor, an engine rotation speed sensor, an electronic fixed storage device that stores characteristic values such as engine rotation speed and engine load limit values commensurate with the vehicle load weight, and the load sensor and engine. a central information processing device that receives an output signal from a rotational speed sensor, selects an optimal value from characteristic values of the electronic fixed storage device, and sends a control signal regarding a maximum engine rotational speed and a maximum engine load; and the central information processing device a first actuator that receives a control signal regarding the maximum engine load from the first actuator;
a second actuator to which a control signal related to the maximum engine speed is input; an engine maximum load regulating member connected to the first actuator and regulating the movable range of the load lever of the governor of the fuel injection pump; a maximum engine rotation speed regulating member that regulates a movable range of a speed control lever connected to an actuator and operated independently of a load lever of the governor; The actuator causes the engine maximum load regulating member to protrude relative to the load lever, and
Separately, the second actuator causes the maximum engine rotational speed regulating member to protrude relative to the speed control lever in accordance with the size of the loaded weight, thereby adjusting the maximum engine output commensurate with the loaded weight of the vehicle. Or a control device for a diesel engine, characterized in that it is configured to perform control so that the maximum engine speed is obtained.