JPH056184Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is used in an automatic transmission device of an automobile.
In particular, it relates to driving a starter motor when an automatic transmission controlled by an electronic control circuit becomes inoperable and an emergency operating means is used.

〔overview〕

The present invention provides an automatic transmission device equipped with an emergency operation means, which is provided with a separate emergency start switch means that supplies a driving current to the starter motor even when the emergency operation means is operated and control of the electronic control circuit is stopped. This allows the engine to start even if a failure occurs in the electronic control circuit.

[Conventional technology]

Automatic transmissions using mechanical clutches are constructed in such a way that the engine, clutch, and bias clearance are controlled by an electronic control circuit that includes a computer.

This automatic transmission is provided with an emergency operating means that is operated in the event that a failure occurs in its electronic control circuit, actuator, or the like. For example, the engine is configured to be equipped with an emergency engine stop button, a manual accelerator operation means, an emergency changeover switch, etc., so that the engine can be operated manually in an emergency.

Further, an emergency clutch control knob is provided, and means for manually engaging and disengaging the clutch is provided by operating the knob, and an emergency shift lever is further provided, and when this knob is operated, the transmission is activated. The structure is such that the vehicle can be operated with the transmission gear set at at least the first speed and reverse positions.

When an emergency operating means is provided in this way, when the emergency operating means is operated, the power to the electronic control circuit must be turned off so that automatic control from the electronic control circuit and manual operation by the emergency operating means do not conflict. It is necessary to provide a means to stop the control of the electronic control circuit, such as automatically shutting it off, and to give priority to the operation by the emergency operation means.

In a control device using an electronic control circuit as described above, control of the starting motor generally depends on the electronic control circuit. That is, in order to confirm that the transmission is in the neutral position and other safety conditions when rotating the starter motor, the key switch is not linked to the drive current switch of the starter motor. The starting motor operation command from the key switch is once input into this electronic control circuit, and after the electronic control circuit determines that the system is in a safe state, the driving current circuit for the starting motor is opened.

[Problem that the invention attempts to solve]

Therefore, when the emergency operation means is operated and the operation of the electronic control circuit is forcibly stopped, it becomes impossible to supply the driving current to the starter motor from the normal current supply circuit of the starter motor.

The present invention has a configuration in which the starting motor is controlled by an electronic control circuit, and an emergency operating device that can operate the starting motor even if the emergency operating means is operated and the control by the electronic control circuit is stopped. The purpose is to provide

[Means for solving problems]

The present invention provides an emergency start switch means, which is provided separately from the circuit controlled by the electronic control circuit, for supplying a driving current to the starting motor of the engine by manual operation even when the control by the electronic control circuit is stopped. It is characterized by:

Preferably, the emergency start switch means is automatically enabled in accordance with the detection output of a detection circuit that detects that the emergency operation means has been operated.

[Effect]

When the emergency operating means of the automatic transmission is operated,
In order to avoid conflict between the operation by the emergency operation means and the control by the electronic control circuit, the control operation of the electronic control circuit is automatically stopped by, for example, cutting off the power to the electronic control circuit. Therefore, even if the key switch is used to start the engine, the circuit that supplies drive current to the starter motor does not operate.

At this time, by manually operating the emergency start switch means, the starter motor can be operated in a state where the electronic control circuit is not operating.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

The figure is a block diagram showing an embodiment of the present invention.

A computer 1 is connected to a memory 2 and an interface circuit 3, and is connected to a power supply 5 via a switch circuit 4 to form an electronic control circuit.

A fuel injection timing control means and a fuel injection amount control means of the injection pump 7 of the engine 6 and a rotational speed sensor 8 for detecting the engine rotational speed are connected to the interface circuit 3.
The interface circuit 3 also includes solenoid valves 12 and 13 that control the amount of operation of the actuator 11 that controls the connection and disconnection of the clutch 9, and the transmission 1.
It is connected to a control mechanism 14 that controls the 0 transmission gear change. Furthermore, the interface circuit 3
It is connected to a vehicle speed detection sensor 16 that detects the rotational speed of the propeller shaft 15 as a vehicle speed detection means, an accelerator opening sensor 18 that detects the amount of depression of the accelerator pedal 17, a select lever operation panel 19, and a display 20. It is connected.

This automatic transmission is equipped with an accelerator volume 21, an emergency changeover switch 22, an engine control unit 23, and an emergency engine stop button 24 as an emergency engine control device in case the electronic control circuit fails. The engine is configured so that the engine can be controlled manually. Additionally, an emergency shift lever 25 for operating the transmission 8 is provided as an emergency operating means to be operated in the event of an emergency when the electronic control circuit does not operate. It is installed where there is no.
By operating this emergency operating lever 25, the transmission can be set to at least the first gear or reverse gear position. Further, the clutch 9 is configured to be connected and disconnected manually by operating an emergency clutch control knob 26 as an emergency operating means for operating the clutch 9.

The above-mentioned emergency shift lever 25 is provided with a detection circuit 27 that detects that the emergency shift lever 25 is operated.
The output of 7 is connected to the control input of a switch circuit 4 that connects the computer 1 and its power source 5. This detection circuit 27 is connected to the emergency shift lever 25.
The mechanical displacement of the sensor is detected using electrical contacts. In other words, when the emergency shift lever 25 is operated, the electrical contacts of the detection circuit 27 automatically close, cutting off the power to the computer 1, and a new control command is sent from the computer 1, allowing manual operation in an emergency. It is structured in such a way that there is no contradiction.

Here, the power supply system of the starting motor, which is the main part of the present invention, will be explained. In FIG. 1, the engine 6 is provided with a starter motor 38;
The operating current of 8 is connected to the power supply 5 through the contacts of the relay 39.
Supplied from. The winding current of this relay 39 is supplied via a switch 40 provided inside the interface circuit 3. This switch 40 is opened and closed under the control of the computer 1. More specifically, the key switch of this motor vehicle is connected to the interface circuit 3, and FIG. 1 specifically shows the contacts 42 of the key switch in the starting position. This contact 42 closes when the key is inserted into the automobile key switch and rotated to a starting position which drives the starting motor 38. When the computer 1 detects that the contact 42 is closed, it determines whether the transmission 10 is in neutral, and operates to close the switch 40 if the transmission 10 is in neutral. If the transmission 10 is not in neutral, the switch 40 is closed after controlling the transmission 10 to be set in neutral. In other words, this switch 40 is not closed when the computer 1 is not operating, and in the event of an emergency operation assuming that the computer 1 is not operating properly,
The relay 39 cannot be operated by the current passing through the switch 40.

For this reason, the present invention is provided with an emergency start switch 45 that can start the engine even in the event of an emergency operation. This emergency start switch 45 is inserted into a circuit that supplies power supply current to the winding of the relay 39. This emergency start switch 45 is connected by a wire 47 to an emergency start knob 46 which is arranged alongside the accelerator volume 21, emergency changeover switch 22, emergency engine stop button 24, etc., which are operated only in an emergency as described above. Concatenated.
This emergency start switch 45 is the emergency start knob 4.
It is closed by manually operating 6.

The power supply side circuit of this emergency start switch 45 is the switch circuit 4 for automatically stopping the power supply of the computer 1 in the event of an emergency operation as described above.
It is supplied via the break-side contact 4b provided at. That is, when the switch circuit 4 stops supplying power to the computer 1, the contact 4b on the break side of the switch circuit 4 is connected to the power supply by the detection circuit 27 that detects that an emergency operation has been performed. The power source 5 is connected to the power source side contact of the start switch 45.

Next, the operation of this embodiment will be explained.

The computer 1 connects the engine speed sensor 8 and the vehicle speed sensor 1 via the interface circuit 3.
6, information from the accelerator opening sensor 18 and select lever operation panel 19 is taken in, and the injection pump 7 and electromagnetic valves 12, 13 of the engine 6 and the control mechanism 14 of the transmission are controlled by a built-in program.

Now, it is assumed that a failure has occurred in one of the computer 1, the solenoid valves 12 and 13, or the transmission control mechanism 14. At this time, when the driving vehicle switches from automatic shift control to emergency operation and drives, the emergency shift lever 25 is operated. The detection circuit 2 detects that the emergency shift lever 25 is operated.
7 is detected, the output of this detection circuit 27 is sent to the switch circuit 4 that connects the computer 1 and the power supply 5.
cut off. Due to the operation of this switch circuit 4,
Since the computer 1 is powered off and no longer sends control signals, the solenoid valves 12 and 13 that control the clutch and the transmission control mechanism 14 no longer operate.

Next, the operation of supplying drive current to the starting motor of this embodiment will be explained in more detail.

Under normal conditions, when the starter motor 38 is used, the computer 1 detects whether the transmission 10 is in the neutral state when the contact 42 at the starting position of the key switch is closed. If the transmission 10 is not in the neutral state, the computer 1 controls the control mechanism 14 to control the transmission 1
0 to the neutral state and then closes the switch 40. This energizes the relay 39, so a drive current flows to the starter motor 38 through the contacts of the relay 39, causing the starter motor 38 to rotate and start the engine 6.

Next, driving of the starter motor 38 when a failure occurs in the computer 1 and control becomes impossible will be described. When the emergency shift lever 4 is operated as described above, the power supply current supplied to the computer 1 is cut off by the switch circuit 4 based on the detection output of the detection circuit 27, and the computer 1 stops its operation. control signals will no longer be sent.
Therefore, even if the turbulence contact 42 of the key switch is closed, the switch 40 will not operate and the starting operation will not be possible. At this time, since the power source 5 is connected to the break side contact 4b of the switch circuit 4, the emergency start switch 45 is closed by operating the emergency start knob 46, and the relay 39 can be energized. When the relay 39 is energized, a drive current flows through the contacts of the relay 39 to the starter motor 38, causing the starter motor 38 to rotate and start the engine 6. In this device, when the computer 1 is operating normally, the break side contact 4b of the switch circuit 4 is open, so even if the emergency start knob 46 is operated by mistake, current will flow through the emergency start switch 45. Safety is ensured.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

This embodiment shows another configuration example of the emergency switch means. That is, the emergency starting knob 46 is characterized in that it is connected by a wire 47 so as to displace the contacts of the relay 39.

According to this structure, even if the computer 1 does not operate and the contact 40 remains open and the relay 39 is no longer energized, the emergency start knob 4
By manually operating 6, the contacts of the relay 39 can be forcibly set to a conductive state.

The rest of the structure is the same as that of the apparatus of the first embodiment described in FIG.

The device of this second embodiment has the advantage that it can be used even when a failure occurs in the winding of the relay 39. Further, in the second embodiment, the position of the pinion gear of the starter motor is linked to a relay contact that cuts off and on the drive current of the starter motor, and at the same time the relay contact closes, the pinion gear meshes with a gear that is pivoted on the rotating shaft of the engine. This is advantageous when used in a device in which the pinion gear is disengaged when the relay contact opens.

Note that both of the above two embodiments are configured to stop the control of the electronic control circuit when the emergency shift lever is operated, but other emergency operation means such as the emergency clutch control knob or the emergency engine It may be configured to detect that a changeover switch or the like is operated and stop the control of the electronic control circuit.

In the above embodiment, a configuration has been described in which the control of the electronic control circuit is stopped by cutting off the power supply circuit that supplies the electronic control circuit. Although this configuration is certainly excellent in stopping the control of the electronic control circuit, there are various other methods for stopping the control of the electronic control circuit. For example, there are methods to cut off the output of the computer while supplying power to the electronic control circuit, methods to stop the clock signal given to the computer while the power is supplied to the computer, methods to disconnect the interface circuit from the computer, and others. . The present invention can be similarly implemented with a configuration in which control of the electronic control circuit is stopped using these methods.

[Effect of idea]

As described above, according to the present invention, in an automatic transmission in which the starting motor is controlled by an electronic control circuit, when the emergency operating means is operated, the control of the electronic control circuit that controls the automatic transmission stops. Even if the starting motor is activated, the engine can be started by operating the starter motor.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the first embodiment of the present invention. FIG. 2 is a block diagram of a second embodiment of the present invention. 1...Computer, 2...Memory, 3...Interface circuit, 4...Switch circuit, 5...
Power supply, 6...Engine, 7...Injection pump, 8...Engine speed sensor, 9...
Clutch, 10...Transmission, 11, 12...Solenoid valve, 14...Control mechanism, 15...Propeller shaft, 16...Vehicle speed sensor, 17...Accelerator,
18...Accelerator opening sensor, 19...Select lever operation panel, 20...Display, 21...
Accelerator volume, 22...Emergency changeover switch, 23...Engine control unit, 24...Emergency engine stop button, 25...Emergency shift lever, 26...Emergency clutch control knob, 27
...Detection circuit, 38...Starting motor, 39...Relay, 40...Switch, 42...Key switch starting contact, 46...Emergency starting knob, 47...
wire.

Claims (1)

[Claims for Utility Model Registration] (1) A control mechanism 14 that controls switching of a transmission, and electronic control circuits 1, 2, and 3 that provide control signals to this control mechanism and an engine connected to the input side of the transmission. An emergency operation means 25 is provided for manually switching and setting the transmission, a detection circuit 27 detects that the emergency operation means is operated, and an output of this detection circuit automatically switches the transmission An emergency operation device for an automatic transmission equipped with a switch circuit 4 for stopping the control of the control circuit, which applies a driving current to the starting motor of the engine by manual operation when the control of the electronic control circuit is stopped. An emergency operation device for an automatic transmission, characterized in that it is equipped with emergency start switch means 45, 46, and 47. (2) Utility model registration claim No. (1) that the emergency start switch means is configured to automatically become effective in accordance with the detection output of a mechanical displacement detection circuit that detects that the emergency operation means has been operated. An emergency operating device for automatic transmissions as described in paragraph 1.