JPS63251330A - Automatic speed change unit for gear type transmission - Google Patents

Abstract

PURPOSE:To make it possible to escape from a rail way crossing or the like upon emergency by providing such an arrangement that the gear position is automatically set to a running range when an emergency escape switch is turned, so as to enable an engine to be cranked by a starter while a clutch is left to be engaged. CONSTITUTION:If an emergency escape switch 12 is turned off, a CPU 5e in a control unit 5 turns on a starter circuit only when it judges such that the gear position is set at a neutral position and a clutch is disengaged so as to make it possible to start an engine, and accordingly, the engine can be normally started. Meanwhile, when the emergency escape switch 12 is turned on, a select lever 11 is set to a running range so that the clutch is engaged, and thereafter the starter can be energized. Thereby it is possible to move a vehicle by cranking upon emergency such as fuel shortage, an engine trouble or the like.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an automatic gear transmission device, and more specifically, when a gas shortage or engine trouble occurs, the vehicle can be moved by cranking the starter. This invention relates to an automatic transmission device for a gear transmission.

(Prior Art) Conventionally, an automatic transmission of a gear transmission is constructed as shown in FIG.
By setting the engine to the neutral range, when a clutch disengagement signal is output from the control unit 5 to the electromagnetic valve of the clutch actuator 8, the clutch is disengaged, and furthermore, the starter circuit is turned on and the engine can be started. After that, by putting the select lever 11 into lunge and depressing the accelerator pedal, the output signals of the accelerator switch 4 and accelerator opening sensor 3 are transmitted to the control unit 5.
A clutch connection signal from the control unit 5 is output to the solenoid valve of the clutch actuator 8, thereby connecting the clutch, connecting the gear transmission 1 and the engine E, and starting the vehicle.

(Problems to be Solved by the Invention) In the conventional gear transmission automatic transmission described above, the starter can only be started when the gear transmission is in neutral and the clutch is disengaged. Alternatively, if there is a gas shortage or engine failure within an intersection, there is a problem in that the vehicle cannot be started and it is extremely difficult to urgently escape the vehicle from the location.

Therefore, in the present invention, even if the range of the gear transmission is in the driving range, the vehicle can be moved by cranking with the starter by operating the emergency escape switch installed in the driver's seat in the event of engine trouble. The technical challenge is to solve the problem of

(Means for solving the problem) A technical means for solving the above problem is to use the output signal of an accelerator opening sensor that detects the amount of depression of the accelerator pedal and the output signal of a vehicle speed sensor that detects the vehicle speed. a control unit that outputs a drive signal to a shift actuator that selects the meshing position of the gear transmission based on the engine, a select actuator, and a clutch actuator that connects and disconnects a clutch interposed between the engine and the gear transmission. In an automatic transmission system using a gear transmission, an emergency escape switch is provided which forcibly connects the clutch and moves the vehicle by cranking the starter even if the range of the gear transmission is in the travel range in the event of an engine failure. The configuration is such that it is installed in the driver's seat.

(Function) According to the gear transmission automatic transmission with the above configuration, when engine trouble occurs at a railroad crossing, intersection, etc. and the vehicle cannot be started, when the emergency escape switch is turned ON, the control unit is activated. A signal is input, and even if the gear range of the gear transmission is in the travel range, a clutch connection signal for connecting the clutch is output from the control unit to the clutch actuator, and the engine and gear transmission are connected. In that state, move the vehicle by cranking the starter, take the vehicle off the railroad,
It acts to allow emergency escape from intersections, etc.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 shows a schematic diagram of the automatic transmission of a gear transmission, and Figure 2 shows the configuration of the control unit in the equipment.
FIG. 3 shows a control program within the control unit.

In the figure, a gear-type transmission 1 connected to an engine E
includes a shift actuator 6 and a select actuator 7, which are a set of hydraulic cylinders that can change the meshing of the gears in the gear transmission 1, and a hydraulic cylinder that can connect and disconnect the clutch interposed between the engine E and the gear transmission 1. A set of clutch actuators 8 are provided, and the engine E is further provided with a throttle actuator 10 that can adjust the opening degree of the throttle. The shift actuator 6 can change gears in the shift direction shown in FIG. 5, while the select actuator 7 can change gears in the select direction shown in FIG.

These shift actuator 6, select actuator 7, clutch actuator 8, and throttle actuator 10 are operated based on command signals from a control unit 5 composed of a microcomputer. ．． Accelerator opening sensor 3. Accelerator switch 4.
Select lever 11. It is configured to receive signals from an engine rotation sensor 9 and an emergency evacuation switch 12 which is turned on when an engine trouble occurs at a railroad crossing, intersection, etc. and the vehicle is to be evacuated in an emergency by cranking the starter. There is.

The emergency escape switch 12 is located at a position where it can be operated from the driver's seat, and the select lever 11 is installed inside the vehicle and can be set to D range (drive), reverse, 1st gear, 2nd gear, etc. based on the driver's intention. A contact switch is provided at each select position such as drive or reverse, and a select position signal from the contact switch is input to the control unit 5.

When the select lever 11 is set to the D range (drive), automatic gear shifting operation is performed, and at other positions, manual gear shifting operation is performed as in the past.

It will be done.

Further, the accelerator opening sensor 3 detects the amount of depression of the accelerator pedal by the driver, and is composed of a potentiometer or the like, and inputs an accelerator opening signal into the control unit 5. Further, an engine rotation sensor 9 is installed on the crankshaft of the engine E, and inputs the rotation speed of the crankshaft to the control unit 5.

Further, the vehicle speed sensor 2 is provided on the output shaft of the gear transmission 1, and inputs a vehicle speed signal to the control unit 5.

The accelerator switch 4 is installed below the accelerator pedal and consists of a normal ON/OFF switch, etc., and is turned ON when the driver's foot is on the accelerator pedal, and the foot is removed from the accelerator pedal. The ON/OFF state of the accelerator is input to the control unit 5.

Further, the throttle actuator 10 is constituted by a stepping motor and is connected to a throttle valve shaft, so that the throttle valve can be opened and closed by rotation of the stepping motor.

The shift actuator 6, select actuator 7, and clutch actuator 8 each include a hydraulic cylinder and a solenoid valve that drives the hydraulic cylinder, and each solenoid valve is activated based on a command signal from the control unit 5. Each hydraulic cylinder is operated by switching the hydraulic port between ON and OFFFL using a solenoid valve.

The control unit 5 has a configuration as shown in FIG. 2, and includes a pulse input circuit 5 that inputs pulse signals from the vehicle speed sensor 2 and the engine rotation sensor 9.
a, an analog input circuit 5b that inputs analog signals from the accelerator opening sensor 3, and a contact input that inputs position and status signals from the select lever 11 and accelerator switch 4, as well as the ON signal of the emergency escape switch 12. a circuit 5C, a CPU 5e composed of, for example, an 8-bit microcomputer, a step motor drive circuit 5f that outputs a drive command signal to the throttle actuator 10, the shift actuator 6,
Select actuator 7, clutch actuator 8
It is mainly composed of an electromagnetic valve drive circuit 5g that outputs an operation command signal to the analog input circuit 5b.
Then, the input signal is converted into a technical signal by the AD converter and inputted to the CPU 5e, and the liquid 8 one-point input circuit 5C is connected to the CPU 5e via the multiplexer 5d.
It has a structure that supplies signals to.

In such a configuration, the CPU 5e stores an automatic shift diagram that can determine shift points as shown in FIG. 4, for example, and when the select lever 11 is in the D range, Based on this stored automatic transmission diagram, automatic transmission control is performed by the control unit 5, and the actuator 6.7.8 is activated as appropriate.
An activation command signal is issued.

For example, when a shift command is issued based on an automatic shift diagram, a command is first issued to the throttle actuator 10 to operate the throttle of the engine E in the closing direction, and the operation of the throttle actuator 10 lowers the engine speed, causing the Immediately before the engine shifts from the acceleration state to the coasting state (determined by the input signal from the engine rotation sensor 9), a command signal to disengage the clutch is issued to the clutch actuator 8, and the clutch actuator 8 operates to disengage the clutch. disconnected.

After that, a shift command based on the automatic shift diagram is issued to the shift actuator 6 and select actuator 7, and the shift actuator 6 controls the shift direction and the select actuator 7 controls the select direction, and the gears are shifted to a predetermined gear position. and shift. After that, a connection command is issued to the clutch actuator 8, and the clutch actuator 8 operates to connect the clutch. At the same time, a command is issued to the throttle actuator 10 to open the throttle position to a position that matches the amount of depression of the accelerator pedal (according to the input signal from the accelerator opening sensor 3), and the throttle position is fully adjusted. Such an operation command is issued every time the gear is changed, and the gear shifting operation is performed in the same flow as the operation normally performed by a driver when changing gears.

Next, the operation of this embodiment will be explained based on FIG. FIG. 3 is a flowchart showing the control program of this embodiment built into the CPU 5e.

Step S1 of the same flowchart (hereinafter simply Sl...
・In S19), the CPU 5e inputs the signal from the select lever 11 and inputs the selector position SP, the current gear position GP, and the operating state KSS of the emergency escape switch 12, that is, ON or OFF. Read the data. Then in 82 GP=
It is determined whether the current gear position GP and selector position SP match.

As a result of the determination, if GP=SP, it is determined in S3 whether the emergency escape switch 12 is ON or OFF, and if it is determined that it is ON, the clutch is controlled to be connected in S4 and the emergency escape is possible. After issuing a sound from a warning sound generation device (not shown),
The process moves to 810, which will be described later.

On the other hand, as a result of the judgment in S2, the current gear position G
If it is determined that P does not match the selector position SP, the clutch is controlled to be disengaged in S5, and the transmission actuator is further controlled in S6 so that the gear becomes neutral.

Next, in step S7, the selector position SP
Determine whether the position is in the driving range or neutral range. As a result of the determination, if the vehicle is in the driving range, the gear is shifted and changed in the next step 88, and then the process returns to S1 and repeats S1 to S7. On the other hand, if it is determined in S3 that the emergency escape switch 12 is OFF, the process moves to S9 and it is determined whether the selector position Sr is in neutral. If the result of the determination is YES, clutch disengagement control is performed in S5 as described above.

If the determination in S9 is No, the process returns to S1.

If it is determined that the selector position is neutral in the determination of step S7, or
If the vehicle is controlled to a state where emergency evacuation is possible in step 4,
A starter circuit (not shown) is turned on in the SIO, allowing the starter to start.

Gear selection control is performed in Sll, and in 512 it is determined whether the target gear position and the current gear position are the same. If it is determined that the two positions are not the same, a shift command signal is output in S13, and then the process returns to Sll. On the other hand, when it is determined that the two positions are the same, it is determined in S14 whether the vehicle speed is less than or equal to a preset reference speed X/krn. If the judgment effect in S14 is No, after performing normal clutch and throttle control in S15, the above-mentioned S
Return to 11. On the other hand, if the determination result in S14 is YES,
That is, if it is determined that the vehicle speed is less than or equal to X/krn, it is determined in S16 whether or not the accelerator is depressed. If the determination result in S16 is YES, a start command is issued in S17 and the process returns to S11, while if the determination result in 316 is NO, a stop command is issued and the process proceeds to S19.

In S19, it is determined whether or not the engine rotation speed is Orpm, and if it is determined to be Orpm, the process returns to S1, while if it is determined to be equal to or higher than Orpm, the process returns to 311.

As described above, according to the control program, when the emergency escape switch 12 is OFF, the CP of the control unit 5 is
The U5e performs normal engine starting by turning on the starter circuit only when the gear position is new or tral and the clutch is determined to be disengaged, allowing the engine to start. On the other hand, when the emergency evacuation switch 12 is operated to ON, the select lever 11 is set to the travel range, which connects the clutch and enables the scooter to start. enable movement.

(Effects of the Invention) As described above, according to the present invention, by providing an emergency escape switch and turning this switch ON, the select lever is placed in the driving range even if the gear position is not neutral, and the clutch is in the engaged state. Since the engine can be cranked by the starter while the engine is running, it has the effect of allowing the vehicle to escape from a railroad crossing, intersection, etc. in an emergency in the event of a gas shortage or engine trouble.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram of an automatic transmission of a gear transmission, Fig. 2 is a block diagram of the configuration of the control unit in Fig. 1, and Fig. 3 is a block diagram of the control unit in Fig. 2. CP of
A flowchart diagram showing a control program in U,
Figure 4 is an automatic transmission diagram stored in advance in the CPU;
The figure is a shift direction diagram showing the shift direction and select direction.
The figure is a schematic diagram illustrating the configuration of a conventional automatic transmission device of a gear transmission. E...Engine 1...Gear transmission 2...
・Vehicle speed sensor 3...Accelerator opening sensor 4...Accelerator switch 5...Control unit 5e...CPU6
...Shift actuator 7...Select actuator 8...Clutch actuator 9...Engine rotation sensor 10...Throttle actuator 11...Select lever 12...Emergency escape switch Patent applicant Aichi Kikai Kogyo Co., Ltd. Company agent Patent attorney Yoshihisa Shimizu 1N opening aG
3-251330 (6)'F-Six-needle F* A-"-'?9 Ward

Claims (1)

[Claims] A shift actuator that selects a meshing position of a gear transmission based on an output signal of an accelerator opening sensor that detects the amount of depression of an accelerator pedal and an output signal of a vehicle speed sensor that detects vehicle speed, a select actuator, and an engine. In an automatic transmission device for a gear transmission that is equipped with a control unit that outputs a drive signal to a clutch actuator that connects and disconnects a clutch that is interposed between the gear transmissions, the automatic transmission device is connected to the control unit and is connected to the control unit to prevent gas shortage or engine failure. A gear transmission characterized in that an emergency escape switch is provided in the driver's seat for forcibly connecting the clutch and moving the vehicle by cranking by a starter even when the gear transmission is in a travel range. automatic transmission.