JPS62122826A - Vehicle control device - Google Patents

Abstract

PURPOSE:To make it possible to start an engine only by means of a selector lever alone, by providing a switch on the selector lever so that a clutch is disengaged or a speed change gear is set to a neutral position when no engine rotational speed detection signal is issued in accordance with the detection signal of the switch. CONSTITUTION:During starting of an engine 1 a selector lever 7 is set to a position other than a turn-off position, a turn-on switch is turned on so that an electronic control device 9 issues signal for disengaging a clutch 2 and setting a speed change gear 6 to a neutral position. Thereby, the respective actuators are operated to control the clutch 2 and the speed change gear 6. Further, a throttle valve is controlled to a suitable opening degree, and a starter relay is turned on to start an engine. Accordingly, the engine may be started only by the manipulation of the selector lever 7 without using a key switch.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention automatically starts the engine by simply operating the selector lever of a vehicle equipped with an automatic transmission. The present invention relates to a vehicle control device that can sufficiently prevent such problems.

(Prior Art) In recent years, vehicles have been developed in which the operation of a transmission and a clutch is controlled using an electronically controlled automatic transmission. In vehicles equipped with this type of automatic transmission, if the transmission is in a position other than neutral when the engine is started, that is, if the selector lever is in the driving range, the vehicle may run out of control.
To prevent this type of accident, an interlock circuit is installed to prevent the starter from operating unless the selector lever is in the neutral or parking position.

For example, Japanese Patent Application No. 58-116147 proposes a control lever device for a transmission that is arranged on a switch board and selectively closes the contacts. Japanese Patent Application No. 58-115414 proposes a starter activation device for a vehicle equipped with an automatic transmission that closes the starter circuit by detecting that the lever is in the neutral position and the transmission actuator is in the neutral position. , is considered a safety device circuit.

(Problems to be Solved by the Invention) When driving the vehicle equipped with the automatic transmission described above, the neutral position of the seven-wheel lever is used extremely infrequently. Parking is often done.

In this case, to start the engine, the engine cannot be started when the selector lever is in the driving range due to the interlock circuit mentioned above, so first select the selector lever in the neutral range or parking range, and then move the key switch to the start position. and start the engine. Then, after starting the engine, it is necessary to select the selector lever to the driving range again and start the vehicle, which may confuse an inexperienced driver with the above operation.

The purpose of the present invention is to simplify the operation when starting the engine,
The engine can be started simply by operating the selector lever without using a key switch.

Moreover, it is an object of the present invention to provide a vehicle control device that can sufficiently prevent unexpected vehicle runaway.

(Means for solving the problem) In the present invention, in a vehicle equipped with an automatic transmission that controls the transmission based on the operation of a selector lever, the selector lever is provided with an on/off switch, and the operation of the switch is controlled. and means of detection.

means for detecting engine rotation, means for disengaging the clutch, means for placing the transmission in neutral, and disengaging the clutch or neutralizing the transmission when the off detection signal of the switch is input and there is no engine rotation detection signal; There is provided a vehicle control device comprising means for starting an engine by operating the vehicle.

(Function) In the present invention, when the off/on switch provided on the selector lever is in the on state and the stoppage of the engine is detected,
The clutch, transmission, etc. are controlled by the above-mentioned means so as to be suitable for starting the engine, and the starter relay is energized to start the engine.

Furthermore, when the selector lever is selected to the OFF position and the OFF of the OFF/ON switch is detected, if any actuator is in operation, the operation of that actuator is terminated, and the preset timer is activated. After a predetermined period of time has elapsed, the main relay is turned off and the power is turned off.

(Example) Next, the present invention will be explained in detail using the drawings.

FIG. 1 is a block diagram showing an embodiment of a vehicle control device according to the present invention, and FIG. 2 is a block diagram showing an example of an automatic transmission system for explaining this embodiment.

In the figure, l is an engine having a flywheel 1a, and a clutch 2 composed of a friction clutch allows
It engages with the transmission 6 to drive the transmission 6.

Then, the release lever 2a is driven via the piston rod 3a by the operation of the clutch actuator 3,
The amount of engagement of clutch 2 is controlled. A clutch switch 3b detects the engaged state of the clutch 2 and sends a signal to the electronic control unit 9, and serves as means for detecting clutch disengagement, and issues an ON signal when clutch disengagement is detected. Reference numeral 4 denotes a hydraulic mechanism that sends hydraulic pressure to the clutch actuator 3 and the transmission actuator 5 to perform a predetermined operation, and the transmission actuator controls the gear change between the input shaft 6a and the output shaft 6b of the transmission a6. This is done by controlling the oil pressure supplied to 5. Then, the gear position is detected by the gear switch 6c provided on the transmission actuator 5, and a signal corresponding to the detected gear position is sent to the electronic control unit 9. Note that when the shift a6 is in the neutral position, the detection signal is ON, and the gear switch 6C serves as a means for detecting the neutral position of the transmission. Reference numeral 7 designates a selector lever that is operated by the driver. For example, as shown in FIG. , D3 range (automatic shift from 1st to 3rd speed), D5 range (automatic shift from 1st to 5th speed), R range (reverse), and OFF range are selected, respectively. The OFF range is a position where the vehicle's power is turned off and the engine is stopped, similar to the OFF position of a conventional vehicle key switch. Note that each selection position is detected by the selector switch 7a, and the electronic control unit 9 sends the selection signal as a selection signal.
sent to. 8a is a rotation sensor that detects the rotation speed of the input shaft 6a, 8b is a vehicle speed sensor that detects the vehicle speed from the rotation speed of the output shaft 6b, and 10 is an engine rotation sensor that is a means for detecting the rotation of the engine 1. Each sensor sends a signal to the electronic control unit 9 based on the detected rotational speed. Further, 11 is an accelerator pedal having an accelerator sensor lla, and 12 is a brake sensor having a brake sensor 12a. Signals based on the amount of pedal depression detected by these sensors are input to the electronic control unit 9. 13 is a throttle actuator that controls the opening degree of a throttle valve 13a that controls the amount of fuel supplied to the engine 1;
As a means for detecting the opening degree of a, a signal corresponding to the throttle opening degree is sent to the electronic control unit 9.

The electronic control device 9 is composed of a microcomputer, and includes a processor 9a that performs arithmetic processing, a read-only memory (R
OM) 9b, output port 9c, input port 9d, random access memory (RAM) for storing calculation results, etc.
9e, and an address/data bus 9f connecting these. From the output boat 9c, the clutch actuator 3. A control signal is sent to the hydraulic device 4, transmission actuator 5, throttle actuator 13, etc., and each of them performs a predetermined operation based on the control signal.

Next, in FIG. 1, 71 is an ON switch that constitutes a part of the circuit of the selector switch 7a, and serves as a means for detecting the operation of the OFF/ON switch provided on the selector lever. When the microwave is operated, the ON switch 71 turns OFF.
It turns ON when the switch is operated in a position other than the range, for example, in the driving range or in the neutral position.

This situation is illustrated in FIG. 3, which is a circuit explanatory diagram of the main parts of the selector switch 7a. In FIG. Four sets of switches, the speed change switch 73 and the E switch 74, are interlocked. A lead wire 75 connects the ON switch 71 and the B switch 72, and a lead wire 76 connects the speed change switch 73 and the E switch 74. Also, B
The switch 72 connects the battery 16 to the ON switch 71 and E.
Each contact of the switch 74 and the speed change switch 73 is connected to the electronic control device 9. Therefore, in the OFF range selection position, the four sets of switches described above are not connected to the electronic control device 9 at all as shown in FIG.
It is in F state. Next, when the driving range is set to, for example, the D3 range, a signal is input through the path of battery 16→B switch 72→lead wire 75→ON switch 75→electronic control unit 9, and the signal is turned ON. On the other hand, since the D3 contact of the speed change switch 73 is selected, the E switch 7
A signal indicating that D3 is selected is input to the electronic control unit 9 via the D3 contact point of the gear shift switch 73.

In FIG. 1, reference numeral 17 is a control relay having an excitation coil 17a and a contact 17b. When the ON switch 71 is turned on, the contact 17b is turned ON when a current is passed through the excitation coil 17a according to a command from the electronic control bag M9. When the contact tab of the starter relay 18 is ON, the engine 1 is started by passing current from the battery 16 to the starter 19. Note that one end of the excitation coil 18a of the starter relay 18 is connected to the battery 16, and the other end is connected to the electronic control bag a!
19, and when both the clutch switch 3b and gear switch 6C are ON, the electronic control device 9 issues a command to energize the excitation coil 18a.

Reference numeral 20 denotes a main relay, which has contacts 20b for supplying power to, for example, various 7-actuator units and on-vehicle electrical equipment, and has an excitation coil 2 which is activated by commands from the electronic control unit 9.
The contact 20b is opened and closed under the control of 0a.

Next, regarding the operation of this embodiment configured as described above,
An example of the process will be described with reference to the process flow diagram shown in FIG.

When starting the engine 1, if the selector lever 7 is set to the travel range and the ON switch 71 is set to the ON position,
Current is passed through the excitation coil 17a of the control relay 17 to the electronic control circuit 9, the processor 9a etc. are put into an initial state, the delay timer is cleared and initialization is performed, and then signals from various sensors and switches are input. be done (S
t, S2), when it is determined at 53 that the ON switch 71 is in the ON position, the process proceeds to 34, where the engine l
The signal from the engine rotation sensor 10 that detects the rotation of the engine is checked, and if the signal corresponds to stopping the engine, the process proceeds to S5, and if the signal indicates that the engine is rotating, the process proceeds to S6. Then, in S5, the signal from the clutch switch 3b that detects the engaged state of the clutch 2 is checked, and if the signal of the clutch switch 3b is ON, that is, the clutch is disengaged, the process proceeds to S7. Otherwise, the clutch 2 is determined to be engaged, and the clutch 2 is operated to disengage at S8. Also, starter relay 18
The electronic control unit 9 does not issue a command to energize, and the starter relay 18 is in the OFF state (S8, S9).
, S7, the signal from the gear switch 6C, which is a means for detecting the neutral position of the transmission 6, is checked.
If the signal is ON, it is determined that the transmission is in the neutral position and the process proceeds to S10; however, if it is not ON, the electronic control unit 9 instructs the transmission actuator 5 to change the speed v&
6 as the neutral position and proceed to step S9.

At 510, the signal of the throttle sensor 13b that detects 13RJf of the throttle valve 13a is checked, and if the signal is at a predetermined opening suitable for starting the engine l, the electronic control unit 9 controls the control relay 17 and the starter. A command is issued to conduct current to relay 18. Current is supplied from the battery 16 to the excitation coils 17a and 18a.

Both contacts 17b and 18b are turned ON to operate the starter 19 and start the engine 1 (Sll).
If the signal from the throttle sensor 13b indicates an opening degree inappropriate for engine starting in S10, the throttle valve 13
A command is issued to the throttle actuator 13 to make the opening of the valve a a predetermined opening, and the actuator 13 operates to make the throttle valve 13a a predetermined opening (
S12), then proceeds to St3 from 512 and returns to S2, where, as mentioned above, the ON switch 71 is in the ON position (53), the engine 1 is stopped (S4), and the clutch is disengaged (S12).
5) Since the gear is in neutral (S7) and the throttle valve opening is at the predetermined value (S10), the starter relay is turned on, the starter 19 is activated, and the engine 1 is started. .

Note that if NO is determined in S5 or S7 above, S9
The flow that has progressed to 313 returns to 32 and returns to O again.
N switch 71 ON (S3).

When the engine is stopped (34), the clutch is disengaged (S5), and the gear is shifted to neutral (S7), the throttle opening is determined by the SLO, and if the opening is a predetermined value, the engine is started by the SLI.

In addition, if it is determined in S4 that the engine l is rotating based on the signal from the engine rotation sensor 10, the starter relay 18 is not energized (S6), and electronic control is performed based on signals from various sensors and switches depending on the driving situation. According to the instructions of the device 9,
Each actuator is operated to continue operation.

Next, when it is determined that the ON switch 71 is in the OFF position during operation 33, various sensors are activated at the time of determination.
Step S1 proceeds to step 315 where it is determined whether or not the operation of the actuator being operated has ended based on the signal from the switch.
If it is determined in step 5 that the operation of the actuator has ended, the program timer provided in the electronic control device 9 is cleared in step S16, and the process proceeds to step S18, and it is determined whether the timer is, for example, 10 seconds or more. is determined at 818, and 1
If the value is 0 seconds or more, the electronic control unit 9 issues a command to turn off the main relay 20 and turns off the power (S l
9) Furthermore, when a signal indicating that any actuator is in operation is inputted from the related sensor in S15, the timer increases the timer value to TIMER+1 and reaches 518.
→Proceed to S20 and repeat the flow while keeping the main relay 20 ON.

After the operation of the actuator is completed as described above, for example, 10 seconds later, the electronic control unit 9 commands to turn off the main relay 20 and turn off the power.

As mentioned above, when the ON switch 71 is in the ON position,
When the engine 1 is stopped, the clutch 2, transmission 6, and throttle opening are adjusted to conditions suitable for starting the engine, and the ON switch 71 is set to OFF.
When the actuator is operated to the FF position, the power is turned off after a set predetermined time has elapsed after the operation of the actuator in operation is completed.

Although the present invention has been described with reference to the above embodiment, various modifications can be made within the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As explained above in detail, one aspect of the present invention is that when the selector lever is selected to a position other than the OFF position when starting the engine, the OFF switch is activated.
The on switch is turned on, and the electronic control unit issues a command to disengage the clutch and place the transmission in neutral, actuating the respective actuators to control the clutch and transmission, and then properly starting the engine. Since the engine is started by controlling the throttle valve to the appropriate throttle opening and turning on the starter relay, the conventional process of setting the key switch to the ST position can be omitted, and it also prevents unexpected runaway accidents when starting the engine.・Also, to stop the engine, turn the selector lever OFF.
Since the engine will stop after a predetermined period of time simply by operating to the F position, it is possible to save the effort of performing other operations.

[Brief explanation of drawings]

Fig. 1 is a configuration block diagram showing one embodiment of a vehicle control device according to the present invention, Fig. 2 is a block diagram showing an example of an automatic transmission system for explaining this embodiment, and Fig. 3 is a selector switch. FIG. 4 is a process flow diagram showing an example of the process of this embodiment. ■...Engine, 2...Clutch, 3b...Clutch switch, 6...Transmission, 6c...Gear switch, 7...Selector lever, 9...Electronic control unit,
10... Engine rotation sensor, 17... Control relay, 71... ON switch.

Claims (1)

[Claims] In a vehicle equipped with an automatic transmission that controls the transmission based on the operation of a selector lever, the selector lever is set to off and on.
An on switch is provided, and means for detecting the operation of the switch, means for detecting rotation of the engine, means for disengaging the clutch, means for setting the transmission in neutral, and an off detection signal of the switch is inputted. A vehicle control device comprising means for disengaging a clutch or operating a transmission in neutral to start an engine when there is no engine rotation detection signal.