JPS60244658A - Braking device for vehicles - Google Patents

Abstract

PURPOSE:To raise reliability yet higher as well as to improve safety for people aboard ever so better, by keeping up a solenoid locking device of a power transmission system in an operating state even if holding operation of a brake operating device is released in time of car stoppage, while making the operating state get released in time of starting operation. CONSTITUTION:During car driving, if braking operation takes place, a switch S3 closes, and when a car stops, a switch S2 closes as well. Therefore, an output point Q of a flip-flop comes to H, and a coil 25 is energized with current whereby a solenoid locking device 2 is set in motion, thus a car is kept up in a state of being stopped. And, when a driver's foot comes off a brake pedal 6, the switch S3 comes to open but the output point Q of the flip-flop keepts the H so that the solenoid locking device 2 maintains the operating state. In time of starting, if an accelerator pedal 4 is operated, a switch S4 closes, and the output point Q comes to L. Accordingly, a continuous rating current for the coil 25 is suspended and thereby the solenoid locking device 2 comes to a state of being nonoperable. Therefore, the car comes possible to start.

Description

[Detailed Description of the Invention] (Purpose of the Invention) Industrial Application Field The present invention automatically maintains braking force when a passenger car, truck, bus, two-wheeled vehicle, or other vehicle is stopped and releases it when the vehicle starts. This invention relates to a braking device for a vehicle.

Conventional technology In conventional vehicle braking systems, when the vehicle temporarily stops at an intersection or the like while the vehicle is driving, the brake pedal must be continuously depressed to maintain the service brake force, which reduces safety from rear-end collisions while the vehicle is stopped. (braking force) was not automatically ensured. Additionally, vehicles equipped with an automatic transmission such as a torque converter have the disadvantage that if you take your foot off the brake pedal without changing the shift lever of the transmission to the neutral or parking position, the vehicle will move forward due to a so-called creep phenomenon. was there. In order to solve this problem, an electromagnetic force locking device was placed on the brake pedal (for example, Japanese Patent Laid-Open No. 58-20'214
However, in this case, the electromagnetic force is controlled by a computer, which is expensive, and furthermore, the computer may malfunction due to electronic noise or is unreliable, and is a critical safety component. As a braking device, it had the disadvantage of low safety.

Problems to be Solved by the Invention The present invention has been made in view of the above points, and its purpose is to automatically control the brake even when the holding operation of the brake operation device is released when the vehicle is stopped. power is retained,
Furthermore, the braking force is automatically released when starting the vehicle.
To provide a braking device for a vehicle that can automatically secure braking force during stopping to improve the safety of personnel, has excellent vibration resistance, has a simple structure, is inexpensive, and has high reliability.

(Structure of the Invention) Means for Solving the Problems The present invention provides a power transmission system that transmits power to the drive wheels of a vehicle, and includes a stone bar gear 1, which is disposed so as to be freely engageable and detachable in correspondence with the strike bar gear. An electromagnetic locking device 2 is provided, and the electromagnetic locking device has a fail-safe structure that disengages from the stopper gear when not energized and engages when energized,
A non-contact keep switch device 5 is arranged to maintain the power supply state to the electromagnetic lock device when the holding operation of the brake operation device 6 is released while the vehicle is stopped, and to release the power supply to the electromagnetic lock device when the vehicle is started. are doing.

Function The non-contact keep switch device 5 of the present invention automatically maintains power supply to the electromagnetic lock device even when the holding operation of the brake operation device 6 is released while the vehicle is stopped, and automatically maintains the power supply state when the vehicle is started. This is to automatically release the power supply to the electromagnetic lock device.

Embodiment One embodiment of the present invention will be described with reference to FIGS. 1 to 3. An input shaft 12 connected to an internal combustion engine 10 via an electromagnetic clutch 11 and an output shaft 14 connected to wheels 13 are connected to each other by a steel belt. 15 shows a case in which the present invention is applied to a hydraulic continuously variable automatic transmission capable of transmitting power and continuously changing the gear ratio. (However, the present invention can also be applied to a manual transmission or an automatic transmission that employs a torque converter.) Between the primary pulley 16 and the input shaft 12, which are arranged to be movable left and right with respect to the input shaft 12, A secondary hydraulic chamber 19 is formed between the output shaft 14 and a secondary pulley 18 which is formed outside the primary hydraulic chamber 17 and is arranged to be movable left and right with respect to the output shaft 14 . Then, the oil transported from the oil chamber 20 by the oil pump 21 and fully controlled by the hydraulic control valve system 22 is diverted to the primary oil pressure chamber 17 and the secondary oil pressure chamber 19, and the oil is transferred to the primary pulley 16 and the secondary oil pressure chamber 19. The position of the pulley 18 is controlled and the gear ratio is varied.

In this case, the electromagnetic clutch 11 is controlled by the clutch control computer 23, but the computer is unreliable due to malfunctions such as electronic noise, and the electromagnetic clutch 11 is accidentally connected while the vehicle is stopped. If this happens, there is a danger that the vehicle will run out of control.

In the embodiment, in order to solve this problem, a stopper gear 1 is arranged on the outer periphery of the output shaft 14, and an electromagnetic locking device 2 is arranged in correspondence with the stopper gear so as to be freely engaged and detached, and the electromagnetic locking device is de-energized. It has a fail-safe structure that disengages from the stopper gear when the vehicle is turned on and engages it when the power is applied. It has a high composition.

The electromagnetic locking device 2 includes an electromagnetic coil 25 fixed to the body 24 of the vehicle, a coil case 26, and is always pressed in the direction of the coil case 26 by a spring 27, and is engaged with the stopper gear 1 when R1 and the coil are excited. Plunger 28
It consists of

The electromagnetic coil 25 is connected to the power source V, and the non-contact key switch device 5, which is one of the features of the present invention, is arranged in the power supply circuit. The non-contact keep switch device maintains the power supply state to the electromagnetic locking device even when the vehicle speed detection device 3 that detects the braking operation signal from the brake operation bag W6 and the traveling speed of the vehicle is released, and also maintains the power supply state to the electromagnetic locking device. Sometimes the power supply to the electromagnetic locking device is released, and it is not limited to the examples, but various combinations and design changes of IC circuits, LSI circuits, transistor circuits, diode circuits, fixed resistance circuits, etc. are possible. be. In particular, since the switch is non-contact, switch performance can be ensured sufficiently against vibrations of the vehicle, and vibration resistance can be guaranteed. In FIG. 1, the non-contact keep switch device 5 includes two fixed resistors R1 and R2.
and an RS flip-flop circuit. The R87 reset buffer circuit is a negative logic NAND game) Nl, N2
It can be obtained by connecting Q as shown in FIG. R8
A buffer 34 as a power amplification circuit and a transistor 35 as a driving element are connected between the output point Q of the 79777071 circuit and the coil 25. Fixed resistance R1
That is, normally open switches S1, S2, and S3 are connected in series to the ground line on the side of the set input point S of the flip-flop circuit. The switch S1 is closed in conjunction with the operation key switch 36, and is a closed circuit only during operation. switch S
2 becomes a closed circuit in response to a vehicle stop signal from the vehicle speed detection device 3. In the embodiment, the circuit is configured to close when the vehicle speed becomes lower than the set vehicle speed on the vehicle speedometer, but the circuit is not limited to the embodiment. The detection device 3 can be replaced by a vehicle running wind pressure detection device (such as a switch operated by a wind pressure detection diaphragm), a rotation speed detection device of a wheel axle, or a rotation device that rotates depending on the running wind pressure. In particular, the vehicle speed detection device is configured to detect the wind pressure (including the wind speed) when the vehicle is running.When driving in the rain, a film of water (hydroplaning phenomenon) forms between the wheels of the vehicle and the road surface, and the vehicle brakes immediately. This has the unique effect of not maintaining braking force when the wheels are locked (the wheel rotation speed is almost zero) but the actual traveling speed is high. The switch S3 is a switch that is closed by a braking operation of a brake pedal serving as a braking operating device. On the other hand, a normally open switch S4 is connected to the fixed resistor R2, that is, the ground wire on the side of the reset input point R of the flip-flop circuit, and the switch S4 is closed by acceleration operation of the accelerator pedal as the acceleration operation device 4. .

To explain the operation of the embodiment, at the start of driving, the driver takes his/her foot off the brake pedal to open the switch S3, and depresses the accelerator pedal (switch S4 closes) to close the switch S1. In condition, flip 7
At 0, the human power point s is at the H level, the human power point R is at the H level, and the output point Q is at the H level, so power is not supplied to the coil 25 and the braking of the vehicle is released. And while driving (
When not braking, that is, switch S3 is open, operate the accelerator pedal to open and close switch S4 ((a) and (a) in Figure 3).
The state of (c) is repeated alternately), but the output point Q is at the level in both cases, so power is not supplied to the coil 25. Next, a braking operation is performed (switch S3 is closed), and when the vehicle speed falls below the set vehicle speed (stopped), switch S2 is also closed, and the state shown in FIG.
The output point Q of the knob becomes H level, power is supplied to the coil 25, the electromagnetic locking device is activated, and the vehicle is braked. Then, when stopped, take your foot off the brake pedal and switch S.
3 is open), the state shifts from (b) to (a) in Fig. 3, so the output point Q of the flip-flop maintains the original state a (H level), and the power supply to the coil 25 continues. is being braked.

Next, when you depress the accelerator pedal to restart while stopped, the switch S4 closes and becomes the state shown in ()1) in Figure 3, so the output point Q of the flip 70 knob becomes L level and the coil 25 The power supply to the vehicle is stopped and the brakes of the vehicle are released. Even if you take your foot off the accelerator pedal (switch S4 is open) while driving, the state transitions from state (c) to state (a) in Figure 3, so the output point Q of the flip-flop is LL; Bell, and coil 25. No power is supplied to the vehicle and the vehicle is not controlled.

In this manner, while the vehicle is stopped, the power supply to the coil 25 is automatically maintained by the non-contact keep switch device 5 even if the foot is removed from the brake pedal. Even if the shift lever is in the auto drive position, the vehicle does not move forward (creep phenomenon is prevented), making it safe and making driving easier as there is no need to shift at intersections. Furthermore, even in a vehicle equipped with a manual transmission, the braking force at an intersection can be automatically maintained, and the safety of personnel in the event of a rear-end vehicle collision can be ensured by providing sufficient braking force even when the foot is released from the brake pedal.

In addition, the stopper gear 1 can be replaced with a power transmission gear of a manual transmission or another gear arranged on the power transmission shaft, or a drive gear of an automatic transmission or another gear arranged on the power transmission shaft, and is an electromagnetic locking device. The structure of the embodiment can be modified.

(Effects of the Invention) As described in detail above, the present invention allows the braking force to be automatically maintained without the need to maintain the operation of the brake operation device when the vehicle is stopped while driving, and that the braking force is automatically maintained by operating the acceleration operation device. The retained braking force is automatically released, which has the unique effect of ensuring sufficient braking force while the vehicle is stopped, improving personnel safety and operability, and achieving inch function. It was possible to provide a braking device for vehicles.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the vehicle braking device of the present invention, FIG. 2 is a partial explanatory diagram supplementing FIG. 1, and FIG.
The figure is an explanatory diagram showing different operating states of FIG. 1. 1... Stopper gear 2... Electromagnetic locking device 3... Vehicle speed detection device 4... Acceleration operating device 5... Non-contact keep switch Device 6...
・Brake operating device patent applicant Keihin Seiki Co., Ltd. Representative Watahiki Shibu

Claims (1)

[Scope of Claims] (Li) A stopper gear 1 is provided in a power transmission system that transmits power to drive wheels of a vehicle, and an electromagnetic locking device 2 is provided that is detachably disposed corresponding to the stopper gear. The lock device disengages from the stopper gear when de-energized,
It has a fail-safe structure that is engaged when electricity is applied, and when the holding operation of the brake operating device 6 is released while the vehicle is stopped, the power supply state to the electromagnetic lock device is maintained, and when the vehicle is started, the power is supplied to the electromagnetic lock device. (2) The non-contact keep switch device 5 has a brake operation signal from a brake operation device 6 and a vehicle speed that detects the traveling speed of the vehicle. Claim 1, in which the power supply to the electromagnetic lock device is started when the vehicle stop signal from the detection device 3 is input together, and the power supply to the electromagnetic lock device is canceled by the acceleration operation signal from the acceleration operation device 4. A braking device for a vehicle according to item 1. (3) The braking device for a vehicle according to claim 2, wherein the non-contact key switch device 5 includes at least a transistor. (4) The braking device for a vehicle according to claim 2, wherein the non-contact keep switch device 5 includes at least a flip-flop circuit. (5) The braking device for a vehicle according to claim 4, wherein the non-contact keep switch device 5 includes at least two fixed resistors. (6) The braking device for a vehicle according to claim 2, wherein the vehicle speed detection device 3 detects the wind pressure when the vehicle is running.