JPH0712806B2 - Automatic transmission control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a control device for an automatic transmission, and more particularly to an automatic transmission even after the power switch (ignition switch) of the automatic transmission is switched to an OFF state. The present invention relates to a control device for an automatic transmission, which is configured to connect a drive shaft equipped with tires and the like to an engine to enable so-called gear parking.

[Problems to be solved by conventional technology and invention]

2. Description of the Related Art Conventionally, automatic transmissions used in automobiles and the like are activated by turning on an ignition switch (power switch) so that power is supplied from a battery and the gears can be operated, for example, from neutral to drive. Becomes Further, in the case of parking, generally, after turning off the ignition switch, the side brake is pulled to prevent the drive shaft of the automobile from rotating. However, if left in a cold state with the side brake pulled during parking in a cold region, the wire or the like for operating the side brake will be fixed by ice or the like the next morning, and the side brake cannot be returned to the open state. For this reason, the automatic transmission is operated to a drive state other than neutral, for example, to connect the drive shaft and the engine, and the braking force (engine / brake) of the engine is used to brake the vehicle so that it does not move. It is necessary to do so-called gear parking.

However, the conventional automatic transmission cannot be operated after the power switch is turned off.Therefore, in order to perform the gear parking, be sure to operate the selection lever to a position other than neutral before turning the power switch on. There was a problem that the operation became complicated because the rotary shaft and the drive shaft of the engine had to be cut off in the OFF state. Also, in a device that automatically controls the clutch, after turning off the power switch, the engine may stop rotating and the clutch is put in the connected state after the elapse of the first hand time. Was connected to and was in gear parking. Therefore, if the engine continues to rotate for some time due to some cause, for example, an abnormal phenomenon such as a diesel state, there is a risk that the vehicle may pop out due to the clutch connection.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention (a) energizes the power source of the automatic transmission for a predetermined time even after the power switch (ignition switch) of the automatic transmission is switched to the OFF state. ) And after confirming that the engine etc. has stopped rotating, connect the clutch to connect the engine's rotating shaft to the drive shaft on which the tires are mounted to perform gear parking, and the power switch Even after it is turned off, gear parking is possible with a simple operation, and even if the power switch is turned off after the selection lever has been operated to a position other than neutral, the clutch will be disengaged after the engine rotation has stopped. Connected to prevent cars from jumping out. Therefore, the control device for an automatic transmission according to the present invention is a stop control means for controlling to stop the rotation of an engine in a control system for an automatic transmission configured to connect a rotary shaft of an engine and a drive shaft for braking. A timer for energizing the automatic transmission for a predetermined time so that the automatic transmission can be controlled to shift when the stop control means controls the rotation of the engine; After controlling to stop the rotation of the engine by the control means, when the operation lever of the automatic transmission is operated, the shift operation of the automatic transmission is performed and the shift / reset means for resetting the timer, An engine for confirming that the rotation of the engine is stopped after controlling the rotation of the engine by the stop control means A braking torque generated by the engine, which includes a rotation stop confirmation means and a clutch that connects the rotation shaft and the drive shaft of the engine when the rotation of the engine is confirmed to be stopped by the engine rotation stop confirmation means. Is configured to brake the drive shaft.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention, and FIG. 2 is a flowchart illustrating the operation of the embodiment of the present invention shown in FIG.

In the figure, 1 is an in-vehicle electronic device, 1-1 is a power supply circuit, 1-2 is a timer, 1-3, 1-4, 1-6 is an input circuit, 1-
Reference numerals 5 and 1-7 are drive circuits, 1-8 is a NOR circuit, 2 is an ignition switch, and 3 is a relay.

In FIG. 1, the in-vehicle electronic device 1 in the figure relates to the present invention, and operates the automatic transmission for a predetermined time even after the ignition switch (power switch) 2 is turned off. It is for enabling and enabling the gear parking by connecting the clutch after confirming that the engine rotation has stopped. Input circuits 1-3, 1-4, 1-in the figure which constitute the vehicle-mounted electronic device 1.
Reference numeral 6 is for receiving a signal notified from the outside and converting it into a desired signal.
Reference numeral -7 is for outputting drive signals for controlling the automatic transmission and the clutch mechanism, respectively. Specifically, the input circuit 1-3 turns on the ignition switch 2.
It is for converting the / OFF state into an H level / L level signal and supplying it to the timer 1-2 and the NOR circuit 1-8. The input circuit 1-4 is operated by the operation lever of the automatic transmission from, for example, neutral. The input circuit 1-6 is for receiving the illustrated shift signal sent when the drive is moved to the drive and supplying, for example, an H level signal to the timer 1-2 and the drive circuit 1-5. When the rotation of the engine is stopped based on the engine speed signal,
It is for generating a level signal and supplying it to the NOR circuit 1-8. Further, the drive circuit 1-5 outputs a drive signal for shifting to the automatic transmission in a form corresponding to the notified shift signal when the shift signal is notified to the input circuit 1-4. The drive circuit 1-7 outputs the illustrated clutch drive signal in a form corresponding to the signal notified from the NOR circuit 1-8 when the ignition switch 2 is in the OFF state and the engine rotation is stopped. To drive the clutch to the connected state.

The ignition switch 2 in the figure is switched to an ON / OFF state by what is called a key switch of an automobile or the like, and a voltage from the battery 4 is applied to an ignition coil for applying a high voltage to an ignition plug of an engine. It is for applying.

The relay 3 in the figure is an ignition switch 2 as described later.
Is turned on, the contact of the relay 3 is closed by the voltage supplied from the battery 4 or the H level voltage supplied from the timer 1-2, and the voltage supplied from the battery 4 is supplied to the power supply circuit 1. -1 for supplying.

A predetermined voltage is supplied from the power supply circuit 1-1 to various circuits, timers, and the like that constitute the vehicle-mounted electronic device 1.

The operation of the configuration shown in FIG. 1 will be described in detail below with reference to the flowchart shown in FIG.

In Fig. 2, the ignition switch 2 is turned on.
Shows the state of switching to. As a result, a voltage is applied to the ignition coil that causes the spark plug mounted on the engine to generate a spark. If YES, execute in the figure. If NO, execute in the figure.

The figure shows a state in which normal control is performed. This is because it is determined that the ignition switch 2 is in the ON state in the figure, so the degree of depression of the accelerator pedal, the vehicle speed,
This means performing control necessary for normal driving for the automatic transmission, the clutch mechanism, etc. in response to the driver's operation.

The figure shows a state in which the timer 1-2 is started.
This is because the ignition switch 2 is turned off in the figure, so that the counting of the time to supply the voltage from the battery 4 to the power supply circuit 1-1 via the relay 3 in a self-holding manner is started. means.

The figure shows a state in which the timer 1-2 performs the coefficient (T = T + 1). This means that the timer 1-2 in FIG. 1 counts clocks.

The figure shows a state in which it is determined whether or not the value "T" counted in the figure is larger than a predetermined threshold value "T ₀ ". If YES, execute in the figure. If NO, execute in the figure.
The predetermined threshold value “T ₀ ” is set by the ignition switch 2 of OF
After being switched to the F state, for example, it is set to a value corresponding to the time required to perform gear parking.

The figure shows a state in which it is detected whether or not there is a shift command. This means that after the ignition switch 2 is turned off, it is detected whether or not a shift command is generated by operating the operation lever of the automatic transmission to shift gears to perform gear parking or the like. Accordingly, it is possible to take a measure to be described later such that the power of the automatic transmission is cut off during the switching of the operation lever and the operation does not end halfway or in a non-operating state. If YES, execute in the figure. If NO, execute in the figure.

The figure shows a state in which the shift operation is executed and the timer 1-2 is reset. This is the ignition switch 2
Since the operating lever of the automatic transmission in the figure was operated within a predetermined time after turning off the switch, switch the automatic transmission to a drive other than neutral, such as back, or the switching operation. This means that the timer 1-2 is reset (T = 0) so that the power source of the automatic transmission is not shut off based on the signal from the timer 1-2.

The figure shows a state in which it is confirmed whether or not the engine rotation has stopped. This is to prevent the vehicle from jumping out by connecting the clutch with the engine continuing to rotate due to an abnormal phenomenon such as dieseling after turning off the ignition switch 2 so that high voltage is not supplied to the spark plug, for example. In order to do so, it means checking whether the rotation of the engine has stopped completely. If YES, execute in the figure. In the case of NO, the following is repeated in the figure.

The figure shows the state in which the clutch is connected. This is because it was confirmed that the engine stopped completely in the figure,
This means connecting a clutch to connect a rotating shaft of an engine to a drive shaft equipped with a tire or the like and performing gear parking using the braking force of the engine.

In the figure, the voltage supplied to the relay 3 is cut off to open the contacts of the relay 3 and the battery 4 to the power supply circuit 1-1.
The state where no voltage is applied is shown.

With the configuration and operation as described above, the automatic transmission can be operated for a predetermined time even if the ignition switch 2 is in the OFF state, and after the engine rotation is completely stopped, the engine rotation shaft and the tire are connected. It is possible to mechanically connect the drive shaft to the driven drive shaft and use the braking force of the engine to cause the tire mounted on the drive shaft to perform the braking action (gear parking).

〔The invention's effect〕

As described above, according to the present invention, even after the power switch (ignition switch) of the automatic transmission is switched to the OFF state, the power of the automatic transmission is turned on for a predetermined time and the rotation of the engine or the like is prevented. After confirming that the vehicle has stopped, the clutch is connected to connect the rotating shaft of the engine to the drive shaft on which the tires are mounted, and the braking force of the engine is used to perform gear parking. It is possible to park the gear by a simple operation even after the switch (ignition switch) is in the OFF state, and after confirming that the engine rotation has stopped, connect the clutch and the vehicle pops out. You can choose not to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention, and FIG. 2 is a flowchart illustrating the operation of the embodiment of the present invention shown in FIG. In the figure, 1 is an in-vehicle electronic device, 1-1 is a power supply circuit, 1-2 is a timer, 1-3, 1-4, 1-6 is an input circuit, 1-
Reference numerals 5 and 1-7 are drive circuits, 1-8 is a NOR circuit, 2 is an ignition switch, and 3 is a relay.

Claims (1)

[Claims] 1. A control device for an automatic transmission configured to connect and control a rotary shaft and a drive shaft of an engine, and stop control means for controlling to stop the rotation of the engine; A timer that energizes the power source for a predetermined time to the automatic transmission so that shift control of the automatic transmission can be performed when control is performed to stop the rotation of the engine, and the rotation of the engine is stopped by the stop control means. After controlling to stop, when the operation lever of the automatic transmission is operated, the shift operation of the automatic transmission is performed and the shift / reset means for resetting the timer, and the stop control means of the engine. An engine rotation stop confirmation means for confirming that the rotation of the engine has stopped after controlling the rotation to stop the rotation of the engine; When the engine rotation stop confirmation means confirms that the engine rotation has stopped, a clutch that connects the rotation shaft of the engine and the drive shaft is provided, and the drive shaft is operated by using the braking torque generated by the engine. An automatic transmission control device characterized by being configured to brake.