JPS6223829A - Controller for vehicle - Google Patents

Abstract

PURPOSE:To make starting operation ever so easy, by letting a transmission operate in a neutral position in spite of an operation position of a selector lever, disengaging a clutch, and making a starter so as to be drivable. CONSTITUTION:At the time of engine starting, if a key switch 15 is set to an on-position, a main relay 18 is excited and a contact 18b is turned on, whereby current-energization to various devices and apparatuses is started. Next, when the key switch 15 is set to an ST position, in case where a clutch in a power transmission system is engaged, a clutch-off command is given to a clutch actuator 3 by an electronic control unit 9. And, when a transmission is not in a neutral position, such a command that makes a gear neutral is given to a transmission actuator 5. And, when the clutch is off, the transmission exists in the natural position and a clutch sensor 3b and a gear switch 6c both are closed, a starter relay 14 is excited whereby a starter 17 is so designed as to be driven.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention eliminates the need for the trouble of correcting the position of the selector lever when starting the engine of a vehicle equipped with an automatic transmission, and also sufficiently prevents unexpected vehicle ejection accidents. The present invention relates to a vehicle control device that can prevent such problems.

(Prior Art) In recent years, vehicles have been developed in which an electronically controlled automatic transmission operates a transmission and a clutch.

In this type of vehicle, when the engine is started with the selector lever in the driving range and the transmission in a position other than the neutral position, the selector lever is set in the neutral position or An interlock circuit was installed to prevent the starter motor from operating unless the vehicle was in the parking position.

(Problem to be solved by the invention) However, when driving a vehicle equipped with an automatic transmission or a vehicle equipped with an automatic clutch device, the neutral position is used extremely infrequently, and even when stopped, the driving range, for example the drive range, is There are many cases where the engine is stopped and the vehicle is parked with the vehicle selected. In this case, when starting a parked vehicle, if the selector lever is left in the drive range, the engine will not start, which may confuse an inexperienced driver. Then, once you have started the engine, put it in the neutral position or the parking position.
It takes time to set the drive range again] and start.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle control device that eliminates the above-mentioned interval for selecting a selector lever when starting an engine, and that can sufficiently prevent vehicle ejection accidents.

(Means for Solving the Problems) The present invention provides means for detecting an engine start command, and a command from the means for detecting the engine start command regardless of the operating position of a selector lever, so that at least a clutch disengagement operation can be performed. A vehicle control device comprising: execution means for forcibly executing one of the z ty operations to a neutral position n; and means for starting an engine upon completion of the execution from the execution means.

(Function) When starting the engine, the present invention detects a starting command, confirms that the clutch is disengaged and the transmission is in the neutral position, and then energizes the starter relay to start the engine. The engine can be started with ++f regardless of the position of the selector lever.

(Example) Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a configuration 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 la, and a clutch 2 composed of a friction clutch allows
It drives the transmission 6. Then, the release 1/bar 2a is driven by the operation of the clutch actuator 3 via the piston rod 3a, and the engagement of the clutch 2 is controlled. 3b is the warranty for clutch 2! This is a clutch sensor that serves as the first stage for detecting flange disengagement by detecting the river and sending a signal to the electronic control unit 9. When the engagement of the flange 2 is disengaged, the clutch sensor outputs an ON signal. 4 is a hydraulic mechanism that sends hydraulic pressure to the clutch actuator 3 and the transmission actuator 5, and the operation of the transmission actuator 5 controls the gear stage between the input shaft 6a and the output shaft 6b ff7f. Then, the gear position is detected by the gear switch 6C provided on the transmission actuator 5, and a signal corresponding to the gear position is sent to the electronic control unit 9. Note that when the gear position is neutral, the gear switch 6C, which serves as means for detecting the neutral position of the transmission, transmits an ON signal.

7 is a selector lever operated by the driver, and includes, for example, N range (medium-γ), D range (automatic shift), ■ range (l speed), II range (second speed), ■ range (3
Each range such as high speed) and R range (reverse) can be selected by the lever position, and the selected position is sent as a selection signal to the electronic control unit 9 by the selector switch 7a. 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 lO is an engine rotation sensor that detects the engine rotation speed. A signal based on the detection signal is sent to the electronic control device 9. In addition,
11 is an accelerator pedal that controls the accelerator sensor 1.1a, and 12 is a brake pedal that has a brake switch 12a.

The electronic control device 9 is composed of a microcomputer,
A processor 9a that performs arithmetic processing, a read-only memory 9b that stores control programs for the transmission 6 and clutch 2, an output boat 9c, an input port 9d, and a random access memory 9e that stores arithmetic results etc. are connected. address φ data bus 9f. Control signals are then sent from the output boat 9c to the clutch actuator 3, hydraulic system 4, and transmission actuator 5 to perform predetermined driving.

Next, in FIG. 1, Tr is a transistor controlled by an AND circuit 13 which inputs a clutch sensor 3b, a gear switch 6c, and a starter relay i\J control signal from an electronic control unit 9. The transistor Tr is configured to be OFF when at least one input is OFF, and to be ON when all three inputs are ON. When the key switch 15, which is a means for detecting an engine starting command, is in the ST position and the transistor Tr is turned on, the starter relay 1
Current from the battery 16 passes through the excitation coil 14a of No. 4, which closes the contact 14b and drives the starter 17. Note that starter relay 14 and starter 17 constitute means for starting the engine. 18 is a main relay having an excitation coil 18a and a contact 18b, and when the key switch 15 is turned on, the excitation coil 18a is turned on.
A current is passed through the contact point 18b and the contact point 18b is turned on to supply power to the clutch actuator 3, transmission actuator 5, and other in-vehicle electrical equipment 19.

Next, the operation of this embodiment having the configuration described above will be explained in the third section.
An example of the process will be explained with reference to the process flow diagram in the figure.

When starting the engine 1, when the key is inserted into the key switch 15 and rotated to the ON contact, current flows from the battery 16 to the excitation coil 18a of the main relay 18, and the contact 18b
is turned ON, various electric devices including the electronic control unit 9 are turned on, and predetermined initialization is performed (step St.
), signals from each sensor are input. Next, when the key switch 15 is set to the ST position, if the clutch 2 is engaged in step S3, the process advances to step S4, where the electronic control unit 9 issues a command to the clutch actuator 3 to disengage the clutch 2, and the starter relay is turned off. (Step S5). Further, if the clutch 2 is disengaged in step S3, the process proceeds to step S6, but if the signal from the gear switch 6c is not neutral, the starter relay is switched to OFF with an instruction to shift the gear to new I/N in step S7.
It remains FF. If the gear is in neutral in step S6, the clutch is disengaged and the gear is held in neutral in step S8, starter relay 14 is activated, and contact 4b is turned on to drive starter 17 and start the engine. .

Note that step S2 of -1-. S3. S4. S6, S
7 is an execution means for disengaging the clutch or switching the transmission to the neutral position.

Note that after starting the engine or when the key switch is in the ON position in step S2, each actuator performs a predetermined control cycle according to instructions from the electronic control device 9 based on detection signals from various sensors. .

- As mentioned above, in this embodiment, the key switch is used as a detection means for the engine start command, and the engine is started by operating the key switch to the ST position. Various modifications can be made within the scope of the present invention, such as enabling the engine to be started by detecting the movement of shaking from side to side, and these are not excluded from the scope of the present invention.

Further, in this embodiment, the condition is that the clutch is disengaged and the transmission is neutral, but jumping out of the vehicle when the starter is activated can be sufficiently prevented by either disengaging the clutch or neutralizing the transmission.

In addition, as a starting device for an internal combustion engine,
Proposal No. 9 has been made, and this proposal is to omit the operation of reciprocating the throttle valve to the fully open position at the time of startup, but in the control logic of this control device, it is necessary to add the throttle valve to the clutch neutral condition. It is also extremely easy to improve starting performance by turning on the starter relay after the starter has reached the set position.

(Effects of the Invention) According to the present invention, when starting the engine of a vehicle equipped with an automatic transmission, the transmission is operated in neutral and the clutch is disengaged to drive the starter, regardless of the operating position of the selector lever. The engine can be started without the need to move the selector lever to the neutral or parking position.Furthermore, since the clutch is disengaged and the transmission is also in the neutral position at the time of starting, it has the effect of preventing unexpected vehicle thrust.

In addition, by configuring the switch circuit using the Tr in FIG. 1 as an AND circuit of the starter relay drive signal of the electronic control unit in step S5 in FIG. This is a safety circuit that prevents the device from jumping out even in the event of a malfunction.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an 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 block diagram showing an example of an automatic transmission system. is a process flow diagram showing an example of the process of this embodiment. DESCRIPTION OF SYMBOLS 1... Engine, 2... Clutch, 3 b... Clutch sensor, 6... Transmission, 6C... Gear switch, 7... Selector lever, 9... Electronic control device,
14...Starter relay, 15...Key switch,
17...Starter. Patent applicant: Isuze Jidosha Co., Ltd. Agent: Minoru Tsuji, patent attorney
Itohashi Neyama 1E Book (Spontaneous) November 28, 1985
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Claims (1)

[Scope of Claims] a) means for detecting an engine start command; b) at least a clutch disengagement operation or a switching operation to a neutral position according to a command from the means for detecting the engine start command regardless of the operating position of the selector lever. A vehicle control device comprising: an execution means for forcibly executing one of the operations; c) means for starting an engine upon receiving an execution end signal from the execution means.