JPH0642902Y2 - Slope start control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a hill start control device that is provided in a vehicle of a manual transmission and controls stop and start on a hill.

[Prior Art and its Problems] Conventionally, when stopping a vehicle with a manual transmission on a slope, normally, first step on the brake pedal,
Next, he depresses the clutch pedal and pulls the parking brake when the vehicle stops. When starting on a slope, first shift the gear to the first speed, then depress the accelerator pedal to release the clutch pedal, connect the clutch, and gradually return the parking brake. There is.

However, as described above, when starting a vehicle with a manual transmission on a slope, the accelerator pedal,
Since it is necessary to perform the three series of operations of the clutch pedal and the parking brake while matching them, it is difficult for a driver who is not familiar with driving to smoothly start the vehicle, which may cause the vehicle to retreat or stall. there were. Especially when the road is steep, even a skilled driver may retreat or stall.

Then, in order to solve such a problem, for example, a technique in which an air cushion is provided so as to loosen the force in the returning direction of the pedal (see Japanese Utility Model Laid-Open No. 56-28450) or the clutch pedal is depressed. An attempt was made to improve it by using a biasing technique (see Japanese Utility Model Laid-Open No. 58-167320), but the technique for easily starting on a slope was not reached.

The present invention is based on these techniques, and has further found out a structure for solving the above problems by further research.

[Means for Solving Problems] The present invention made to solve the above problems, as shown in FIG. 1, includes a clutch sensor M3 for detecting a disengaged state or a connected state of a clutch of a vehicle M1, An air cushion M4 that alleviates the return force of the clutch pedal M2, at least one or more vent holes M5 provided in the air cushion M4, and the opening of the vent hole M5 is adjusted to adjust the air cushion M4 from the air cushion M4. A control valve M6 for controlling the flow rate of the air flowing out or flowing into the air cushion M4, a driving state detecting means M7 for detecting at least the vehicle speed of the vehicle M1, the braking force of the brake and the slope of the slope, and the driving state detecting means. Condition determining means M8 for determining that the vehicle is in a stopped state when the vehicle speed is zero and the braking force of the brake and the slope of the slope are equal to or more than predetermined values by M7.
And a braking force retaining means for retaining the braking force when the condition determining means M8 determines that the vehicle is in a stopped state.
M9 and a hill start control device, wherein the clutch sensor M3 detects that the clutch is in the disengaged state, and the condition determination means M8 determines that the vehicle is in the stopped state. Is a valve control means M10 that drives the control valve M6 to reduce the opening of the vent hole, and the braking force holding means M9 when the clutch sensor M3 detects that the clutch is in an engaged state. A gist of a control device for starting a slope is that it includes a braking force releasing unit M11 that releases the holding of the braking force by the vehicle.

Here, the at least one vent hole M5 is, for example, a vent hole having a small diameter and a vent hole having a larger diameter than that. The control valve M6 is, for example, an electromagnetic valve that controls the opening of the large-diameter vent hole. The braking force of the brake detected by the operating state detecting means M7 is, for example, the hydraulic pressure of the brake, and the braking force holding means M9 is, for example, a valve that closes the hydraulic circuit of the brake. Further, the valve control means M10 is for, for example, driving the control valve M6 to instruct opening / closing of the large-diameter vent hole.

[Operation] According to the configuration of the present invention, at least the vehicle speed of the vehicle M1, the braking force of the brake, and the slope of the slope are detected by the driving state detecting means M7, and the vehicle speed is zero by the condition determining means M8. , It is determined whether or not the vehicle is in a stopped state in which the braking force of the brake and the slope of the slope are equal to or greater than predetermined values. As a result, when it is determined that the vehicle is in the stopped state, the braking force holding means M9 maintains the state in which the vehicle M1 is stopped on the slope by holding the braking force. And
By such a condition determination means M8, it is determined that the vehicle is in a stopped state, and by the clutch sensor M3,
If it is detected that the clutch is disengaged,
The control valve M6 is driven by the valve control means M10,
The opening degree of the vent hole M5 of the air cushion M4 for reducing the returning force of the clutch pedal M2 is reduced. Thereby,
By reducing the flow rate of the air flowing out of the air cushion M4 or flowing into the air cushion M4, the returning speed of the clutch pedal M2 is reduced to smoothly connect the clutch. Further, when the clutch sensor M3 detects that the clutch is in the connected state, the holding of the braking force is released, so that after the clutch is smoothly connected, the start on the slope is smoothly performed. It becomes possible. That is, according to the present invention, at the time of starting a slope,
This has the effect of reducing complicated starting operations and preventing the vehicle from retreating or stalling during starting.

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

FIG. 2 shows a control device 1 for starting a slope. As shown in the figure, a bush rod 6 for transmitting the pedaling force to the master ring 4 is provided above the clutch pedal 2, and a clutch detection switch for detecting the position of the clutch pedal 2 is provided on the opposite side of the bush rod 6. 8, rubber air cushion 10 and clutch pedal 2 in the return direction (arrow A
A return spring 12 that biases the (direction) is attached. The positioning rod 14 extending from the end of the air cushion 10 is fixed to a dogleg-shaped support member 16. The air cushion 10 is provided with a first vent hole 18 having a small diameter and a second vent hole 20 having a larger diameter. The second vent hole 20 is provided with a control valve 22 driven by a solenoid, and its opening is adjusted by a signal from a well-known electronic control unit (ECU) 24.

The ECU 24 includes a clutch detection switch 8, a gear position sensor 25 for detecting a gear position, a hydraulic sensor 26 for detecting a brake hydraulic pressure P transmitted to a front wheel cylinder (not shown), a vehicle inclination angle (inclination angle Q of a slope). The signals from the slope sensor 28 for detecting the vehicle speed, the wheel sensor 30 for detecting the vehicle speed V, and the like are input. Then, the operating state is determined according to the input signal, and the slope indicator 31 indicating that the vehicle is starting to drive on a slope, the brake hydraulic pressure hold valve 32 and the control valve 22 that hold or release the brake hydraulic pressure P are displayed. Output a signal.

As shown in FIG. 3 (a), the control valve 22 is normally urged by a spring 23 in the direction of arrow A so that the clutch pedal 2 can be depressed and returned quickly.
The second vent hole 20 is opened. In contrast, ECU2
When being excited by the signal from 4, the second vent hole 20 is closed so that the clutch pedal 2 is gently returned, as shown in FIGS. 3 (b) and 3 (c). Is.

The brake hydraulic pressure hold valve 32 is an electromagnetic valve provided in the proportioning valve 34 shown in FIG. The proportioning valve 34 is provided in a brake hydraulic circuit (not shown) and transmits the brake hydraulic pressure P transmitted from the brake master cylinder to the front wheel cylinder and the rear wheel cylinder. Then, the movement of the cylinder 36 reduces the distribution ratio of the brake hydraulic pressure transmitted to the rear wheel cylinders. The brake hydraulic pressure hold valve 32 is provided in the flow passage port 38 from the brake master cylinder to adjust the opening / closing of the flow passage, and normally the flow passage is opened by the urging force of the spring 40. When excited, the flow passage is closed to maintain the brake hydraulic pressure.

Next, the operation of the hill start control device 1 will be described with reference to FIG.

FIG. 5 is a flowchart showing the operation of the ECU 24. In the figure, first, in step 100, the signal from the slope sensor 28 is read, and the vehicle inclination angle, that is, the slope Q
Is determined to be greater than 1 °. This step
If a positive determination is made at 100, the routine proceeds to step 110. Step 11
At 0, the signal from the oil pressure sensor 26 is read and the brake oil pressure P is 20 kg, which is the pressure required to stop the vehicle on a slope.
It is determined whether or not it exceeds / cm ² . If an affirmative decision is made here, the routine proceeds to step 120. In step 120, the wheel sensor
The signal from 30 is read, and it is determined whether the vehicle speed V is zero. If an affirmative determination is made here, the routine proceeds to step 130. That is, it is determined by the above steps 100 to 120 whether or not the condition for stopping the vehicle on the slope is satisfied. In the following step 130, the signal from the gear position sensor 25 is read to determine whether or not the gear is in neutral. If an affirmative decision is made here, the routine proceeds to step 140. In step 140, the slope indicator 31 indicating that the hill start is being controlled is turned on (slope indicator is on). In the following step 150, in order to connect the stopped state of the vehicle on the slope, a signal for exciting the brake hydraulic pressure hold valve 32 is output to close the flow path through which the brake hydraulic pressure P is transmitted (brake hydraulic pressure hold valve ON), and Hold the brake oil pressure P. by this,
The vehicle can be stopped on a slope even if the brake pedal 4 is released. In the following step 160, the control valve 22
The output of the signal for exciting is stopped to open the second vent hole 20 (control valve off) as shown in FIG. 3 (a), and this routine is once ended. As a result, the first vent hole 18 and the second vent hole are provided as the passages through which the air flows.
Since 20 is opened, the air inflow and outflow of the air cushion 10 can be easily performed, so that the normal depression and return operations of the clutch pedal 2 can be performed.

On the other hand, if a negative determination is made in step 130, the process proceeds to step 170. In step 170, the signal from the clutch detection switch 8 is read, it is determined whether or not the clutch pedal 2 is depressed and the clutch is in the disengaged state,
If an affirmative decision is made here, the routine proceeds to step 180. The clutch detection switch 8 is turned on when the clutch is in the disengaged state, and is turned off when the clutch is in the engaged state. In the switch 180 and the subsequent step 190, the slope indicator 31 and the brake hydraulic pressure hold valve are turned on in the same manner as the steps 140 and 150. In the following step 200, a signal for exciting the control valve 22 is output to close the second vent hole 20 (control valve on) as shown in FIG. 3 (b), and this routine is once terminated. As a result, as the passage through which air flows out, only the first vent hole 18 with a small amount of air flowing out is opened. In this state, when the foot is released from the clutch pedal 2, the third vent hole 18 is opened. As shown in FIG. 3C, the clutch pedal 2 begins to slowly return in the direction of arrow A by the urging force of the return spring 12. As a result, the clutch can be connected smoothly.

On the other hand, when a negative determination is made in step 170, that is,
When it is determined that the clutch detection switch 8 is off and the clutch is in the connected state, the process proceeds to step 210. Step two
At 10, the slope indicator 31 is turned off (slope indicator off). In the following step 220, the output of the signal for exciting the brake oil pressure hold valve 32 is stopped, the flow path is opened (brake oil pressure hold valve is off), and the holding of the brake oil pressure P is stopped. Therefore, when the gear is engaged and the clutch is engaged when the vehicle starts on a slope, the holding state of the brake hydraulic pressure P is released and the brake is released, so that the vehicle can start moving. In the following step 230, the output of the signal for exciting the control valve 22 is stopped.

If a negative determination is made in steps 100 to 120, that is, if the condition for stopping the vehicle on the slope is not satisfied, the process proceeds to step 160, the present routine is once terminated, and the normal clutch pedal 2 operation is performed. To be able to do.

That is, when the condition for stopping the vehicle on the slope is not satisfied as in normal traveling, the second ventilation hole 20 is open as shown in FIG. 3 (a). On the other hand, when the conditions for starting a slope as described above are satisfied, FIG. 3 (b)
The second vent hole 20 is closed by a control valve 22 as shown in FIG. Then, when the clutch pedal 2 is loosened in this state, as shown in FIG. 3 (c), the air cushion 10 contracts according to the amount of air flowing out from the first vent hole 18 having a small diameter, and the clutch pedal 2 Returns slowly in the direction of arrow A. As a result, the clutch can be connected smoothly.

When the vehicle starts on such a slope, the brake oil pressure P is maintained, so that it is not necessary to apply the parking brake. When the gear is put into the first speed and the foot is released from the clutch pedal 2, the clutch is automatically engaged. Be seen. Accordingly, the braking force of the brake is released. Therefore, at the time of starting on a slope, it suffices to release the foot from the clutch pedal 2 and depress the accelerator pedal, and not only the operation of the parking brake but also the delicate matching operation of the clutch pedal 2 and the accelerator pedal is unnecessary. As a result, the operation is facilitated, and it is possible to prevent the vehicle from retreating or stalling on a slope.

As another embodiment, the air cushion 4 may be provided with only one vent hole, and the opening thereof may be adjusted by the control valve 22. Further, the air cushion 4 may be provided on the return side of the clutch pedal 2. Instead, it may be provided on the push rod 6 side.

[Advantages of the Invention] As described above, according to the present invention, the vehicle can be kept in a stopped state on a slope, so that it is not necessary to step on the brake pedal. Further, since the air cushion is provided in the air cushion so as to reduce the force in the returning direction of the clutch pedal, and the opening degree of the ventilation hole is controlled according to the operating state, the clutch pedal is used at the start of the slope. When you release your foot from, the clutch pedal will return gently, and the clutch will be engaged smoothly and automatically. Along with that,
The braking force of the brake is also released. Therefore, it is not necessary to operate the parking brake when starting on a slope,
All you have to do is take your foot off the clutch pedal and depress the accelerator pedal. As a result, there is no need for a complicated operation for starting up a slope, and it is possible to easily start up a slope without causing the vehicle to retreat or stall.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention, FIG. 2 is a schematic configuration diagram of a hill start control device, FIG. 3 is an explanatory diagram showing the operation of a control valve and an air cushion, and FIG. 4 is a proportioning valve. FIG. 5 is an explanatory view showing a part of the vehicle broken, and FIG. 5 is a flowchart showing the operation of the ECU. M1 …… Vehicle, M2 …… Clutch pedal M3 …… Clutch sensor, M4 …… Air cushion M5 …… Vent hole, M6 …… Control valve M7 …… Operating state detection means, M8 …… Condition determination means M9 …… Control Power holding means, M10 ... Valve control means, M11 ...
... Braking force releasing means 2 ... Clutch pedal 8 ... Clutch detection switch 10 ... Air cushion 18 ... First ventilation hole 20 ... Second ventilation hole 22 ... Control valve 24 ... Electronic control unit 32 ... ... Brake oil pressure hold valve

Claims (1)

[Scope of utility model registration request] 1. A clutch sensor for detecting a disengaged state or a connected state of a clutch of a vehicle, an air cushion for reducing a force in a returning direction of a clutch pedal, and at least one or more vent holes provided in the air cushion. A control valve that controls the flow rate of air that flows out of or inflows from the air cushion by adjusting the opening of the ventilation hole, and operation that detects at least the vehicle speed of the vehicle, the braking state of the brake, and the slope of the slope. The vehicle speed is zero by the state detecting means and the operating state detecting means,
Condition determining means for determining that the vehicle is in a stopped state when the braking force applied to the brake and the slope of the slope are equal to or more than a predetermined value, and when the condition determining means determines that the vehicle is in a stopped state, A hill-starting control device comprising braking force holding means for holding a braking force, wherein the clutch sensor detects that the clutch is in a disengaged state, and the condition determination means determines that the vehicle is in a stopped state. If it is determined that the clutch is connected by the clutch sensor after the valve control means that drives the control valve to reduce the opening degree of the vent hole and the valve control means is driven. When detected, a braking force releasing means for releasing the holding of the braking force by the braking force holding means, and a control device for starting a slope. .