JPH048024Y2 - - Google Patents

Description

[Detailed explanation of the idea] <Industrial application field> The present invention relates to an automatic transmission device for a vehicle.

<Conventional technology> In recent years, more and more vehicles are equipped with automatic transmissions that automatically shift gears to reduce driver fatigue. A mechanism has been proposed in which a mechanical clutch is used in place of a torque converter for connection to the clutch (for example, see Utility Model Application No. 80214/1983).

By the way, in such an automatic transmission device, the shift operation of the shift selector by the driver is converted into an electric signal, and the control unit drives and controls the fluid pressure actuator based on this electric signal, so that the gear position of the transmission can be adjusted according to the driver's specification. It is designed to automatically shift to the next gear.

<Problems to be solved by the invention> However, for example, on an uphill road, there are cases where a gear is shifted to a position other than neutral to stop the vehicle, and in such cases, the electrical signal system between the shift selector and the control unit If an abnormality occurs and the shift designation signal cannot be determined, the gear shift operation to neutral is not performed even if a neutral command is issued to start the engine, and if the engine is started using the key switch, the transmission will Since the vehicle is in a shifted state, there is a risk of sudden start.

This idea was made in view of the above circumstances.
To provide an automatic transmission device for a vehicle that can safely start an engine even when a shift designation from a shift selector becomes undetectable.

<Means for Solving the Problems> Therefore, in the present invention, as shown in FIG. 1, when the shift designation signal from the shift designation means is abnormal, it is detected and an activation signal is sent to the alarm means and the operation of the starter motor is stopped. means for outputting a signal; a manual switch for instructing a speed change operation in the event of an abnormality in order to deal with the abnormal state when the alarm means is activated; a command signal from the manual switch; an on signal for a key switch; Based on the detection signal of the accelerator opening detection means, the clutch is forcibly disengaged, the transmission is shifted to a low gear, and the starter motor is started, regardless of the shift position specified by the shift specifying means, and the accelerator is further accelerated. An auxiliary control means is provided to connect and operate the clutch when the accelerator opening reaches a position that allows the vehicle to start after the opening returns to zero.

<Function> As a result, when the shift designation signal of the shift designation means is abnormal, this is detected and an alarm is issued to notify the driver, and after locking the starter motor to a stopped state, the abnormality of the shift designation means is notified by the alarm. When a manual switch is operated by a driver to command a gear shift operation in the event of an abnormality, based on the ON signal of the key switch and the detection signal of the accelerator opening detection means, the signal is determined regardless of the shift specified position of the shift specifying means. The clutch is forcibly disengaged, the transmission is shifted to a low gear, the starter motor is started, and after the accelerator opening has returned to zero, it is detected that the opening is ready for starting. The auxiliary control means performs a gear change operation for when an abnormality occurs, in which the connection control is performed.

<Example> Examples of the present invention will be described below.

FIGS. 2 and 3 show the hardware configuration and main part block diagram of an embodiment of the present invention.

In the figure, engine 1 is equipped with mechanical clutch 2.
For example, a transmission 3 is attached via the propeller shaft 4, and its output shaft is connected to a rear axle (not shown) via a propeller shaft 4. Also,
A fuel injection pump (not shown) of the engine 1 is provided with a governor control device that drives a governor to control the engine speed.

The clutch 2 is equipped with a clutch stroke sensor 6 that detects whether the clutch is engaged or disengaged based on its stroke amount, and a clutch drive actuator 7.

The transmission 3 also includes a countershaft rotational speed sensor 8 that detects the rotational speed of the countershaft, vehicle speed sensors 9 and 10 that detect the vehicle speed from the rotational speed of the output shaft of the transmission 3, and a transmis- sion 3. A shift change actuator 11 that uses air pressure to shift the transmission and a shift position sensor 12 that detects the shift position are installed. 13 is clutch pedal 1
Clutch pedal position sensor that detects the position of 4;
15 is an accelerator opening sensor that detects the accelerator opening based on the position of the accelerator pedal 16.

17 is a shift selector provided in the driver's cab for specifying the shift stage when changing the shift;
N range (neutral range), D range (drive range) and R range (reverse range)
etc. 18 is an engine rotation speed sensor that detects the rotation speed of the engine output shaft; 19 is an error lamp that indicates when the shift designation signal from the shift selector 17 cannot be detected; 20 is a key switch; and 21 is an engine rotation speed sensor that detects the rotation speed of the engine output shaft. 22 is a starter motor, and 23 is a battery, which is a manual pass switch for instructing a speed change operation in the event of an abnormality in order to deal with such an abnormal state when the light is turned on.

On the other hand, the control unit 30 includes a shift change control circuit 31 that issues a shift change command based on an electrical shift position designation signal from the shift selector 17;
A transmission control circuit 32 receives a command signal from the shift change actuator 1 and issues a drive signal to a predetermined shift change actuator 11, and controls the drive of the clutch actuator 7 based on a command signal from the shift change control circuit 31. It includes a clutch engagement control circuit 33 and a shift designation signal determination circuit 34 that determines whether an electric signal for designating a shift position of the shift selector 17 is abnormal. When the determination circuit 34 detects an abnormality in the shift designation signal, it outputs an activation signal to the error lamp 19 and instructs the starter motor 22 to stop operating. and,
When the driver becomes aware of an abnormality in the electrical signal for specifying the shift position due to the lighting of the error lamp 19 and operates the pass switch 21 to generate a command signal for shifting operation in the event of an abnormality, the shift change control circuit 31 generates a command signal for shifting the gear in the event of an abnormality. The starter motor 2
The starter motor 22 is made operable by canceling the operation stop signal No. 2. Furthermore, when a starting operation signal is input to the key switch 20, the clutch is forcibly disengaged, the transmission is shifted to a low gear (for example, 1st position), and the starter motor is started, regardless of the range position of the shift selector 17. Based on the signal from the accelerator opening sensor 15, the clutch is connected when the accelerator pedal 16 returns to zero and reaches an accelerator opening that allows the vehicle to start.

Next, the effect will be explained.

First, the normal shift change operation of the device of this embodiment will be briefly explained.

When a shift position is designated by the shift selector 17, a shift change command is issued from the shift change control circuit 31 of the control unit 30 to the transmission control circuit 32 and clutch engagement control circuit 33 in response to this designation signal.
Then, first, the clutch actuator 7 is driven by the clutch disengagement control circuit 33 to disengage the clutch 2, and after confirming that the clutch 2 has been disengaged by the signal from the clutch stroke sensor 6,
The transmission control circuit 32 drives the shift change actuator 11 to shift the gear to the shift position designated by the shift selector 17. Then, the shift position sensor 12 detects that the gear is engaged.
When confirmed, the clutch 2 is connected again by the clutch actuator 7 via the clutch disengagement control circuit 33, and the clutch stroke sensor 6
Confirm by. In this way, the gear is changed to the shift position designated by the shift selector 17.

Next, control when the shift designation signal cannot be detected will be explained based on the flowchart of FIG. 4.

In S1, it is determined whether the shift designation signal of the shift selector 17 is abnormal or not, and if it is normal, the process advances to S2 and shift change control is performed as usual to the shift position designated by the shift selector 17. On the other hand, when an abnormality occurs, a command to disable the starter motor 22 and a command to turn on the error lamp 19 are issued in S3 and S4, respectively. Next, in S5 and S6, the signals from the pass switch 21 and the key switch 20 are judged, and when the pass switch 21 is turned on and the key switch 20 is in the starter position, the clutch is disengaged in S7, and the transmission gear is set in S8. 1st
Shift set to position. Further, in S9, the starter motor is started, and in S10 it is determined whether the engine has started. Here, if the engine does not start, the starter motor is restarted. If the engine start judgment becomes YES in S10,
Proceeding to S11, it is determined whether the accelerator opening degree θ is θ=0 or not, and the process waits until θ=0. When θ=0 in S11, the next step is to wait until the accelerator opening θ becomes larger than the accelerator opening θ ₁ that allows the vehicle to start.
> θ ₁ , the clutch is connected in S13 and the vehicle is started.

In this way, if an engine starting operation is performed when the shift designation signal of the shift selector 17 cannot be detected, the error lamp will light up, so that the driver can be notified of this. Further, at this time, the starter motor cannot be started unless the pass switch 21 is turned on and the key switch is set to the starter position, so there is no risk of the vehicle running out of control and it is safe. Furthermore, the vehicle can be started by operating the accelerator, and the vehicle can be evacuated to a place where it will not become an obstruction to traffic.

<Effects of the invention> As described above, according to the invention, when a situation in which the shift designation signal cannot be detected occurs, a warning is issued and engine starting is locked, and the lock can be released at the driver's will and by operating the accelerator. This makes it possible to notify the driver of the occurrence of such an abnormality, and in the event of such an abnormality, the engine cannot be started or the vehicle can be started unless operated by the driver, resulting in high safety. Furthermore, it is highly effective as a traffic safety measure because it allows people to evacuate to a place where they will not be an obstacle to traffic.

[Brief explanation of drawings]

Figure 1 is a block configuration diagram showing the configuration of the present invention.
Fig. 2 is a hardware configuration diagram of an embodiment of the present invention, Fig. 3 is a block diagram of essential parts of the same embodiment, and Fig. 4 is a block diagram of the main parts of the same embodiment.
The figure is a control flowchart of the same embodiment. DESCRIPTION OF SYMBOLS 1... Engine, 2... Clutch, 3... Transmission, 6... Clutch stroke sensor, 7... Clutch actuator, 11... Shift change actuator, 12... Shift position sensor, 15... ...Accelerator opening sensor, 17...
...Shift selector, 19...Error lamp, 20
...Key switch, 21...Pass switch, 22
... Starter motor, 30 ... Control unit, 31 ... Shift change control circuit, 32 ...
...Transmission control circuit, 33...Clutch discontinuation control circuit, 34...Shift designation signal determination circuit.

Claims (1)

[Scope of utility model registration request] The automatic transmission for a vehicle includes a control means for automatically controlling the disengagement and engagement of a mechanical clutch and the gear shift operation of a transmission based on a designation signal from a shift designation means that designates a shift position to be used. means for detecting an abnormality in the designated signal of the shift specifying means and outputting an activation signal for the alarm means and an operation stop signal for the starter motor; A manual switch for instructing a gear change operation, and a command signal from the manual switch, an ON signal of the key switch, and a detection signal of the accelerator opening detection means, forcibly regardless of the shift designated position of the shift designation means. Auxiliary control means that disengages the clutch, shifts the transmission to a low gear, starts the starter motor, and connects the clutch when the accelerator opening returns to zero and reaches an accelerator opening that allows the vehicle to start. An automatic transmission device for a vehicle, characterized in that it is provided with the following.