JPS6071331A - Wheel controlling device of car - Google Patents

Abstract

PURPOSE:To ensure safety of driving and simplify construction by eliminating a hand brake lever while carrying out the release of a parking brake on starting a car only when a driving force necessary for starting is obtained. CONSTITUTION:When a foot brake pedal is depressed on a slope, etc., and brake calipers 2 operate, braking a brake disk 1, to stop a car, a foot brake switch 13 and a car speed switch 14 are turned on, closing a B circuit. Then, a current flows in the coil 21 of a vacuum switching valve 17, which, in turn, is opened sending vacuum to a vacuum actuator 18, to pull a hand brake wire 19. Thereby, a parking brake is also applied in addition to the operation of the foot brake.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a wheel control device for an automobile, and in particular, it eliminates the use of a handbrake lever and automatically activates, holds, and releases the parking brake, which was previously done by operating the handbrake lever. The present invention relates to a wheel control device capable of controlling a vehicle.

[Technical Background of the Invention] In general, the brake system of an automobile consists of a hydraulic brake system that works with the brake pedal and a parking brake system that works with the handbrake lever. It is designed to operate disc brakes. The oil LII brake system is used for speed control and stopping, and the parking brake system 1 is used for parking assistance. In addition to parking, the parking brake is also used when starting on a hill.

When starting on a hill, the parking brake is used to start the car while gradually releasing the parking brake by operating the handbrake lever. The judgment is
It was not easy to make a judgment because it relied on human intuition.
The engine often stalls, making it difficult to start on a slope.
Kui Iko.

By the way, if it were possible to start on a hill without operating the handbrake lever, it would not only simplify driving operations but also improve safe driving.

Therefore, in the past, a system was developed in which the rotation of the propeller seat 71 was detected to determine whether the vehicle had stopped running, and based on the result of that determination, the vehicle was automatically kept at a stop, and when the accelerator was operated, the stop was automatically released. (Japanese Unexamined Patent Publication No. 51-43526), a piezoelectric element is provided in the brake member () and the actuator of the brake system is controlled in response to the output of the element (!l!j) −
No. 53423), in history, there is a system in which the brakes are activated by detecting discrepancies between the direction of travel of the vehicle and the shift position of the transmission.
Publication No. 2) has been announced. In all of these, the handbrake was removed so that the brakes are applied when the vehicle is stopped and the brake is released when the vehicle is started.

[Problems with the Background Art I However, in any of the prior art techniques in which the handbrake is abolished and the brake is automatically activated and released, the required circuit and structure are complicated. Moreover, there is a problem in that the brake operation state is released before sufficient driving force is obtained to enable the vehicle to start. Rinawara, the one published in Japanese Patent Application Laid-open No. 51-43526
Since the stop is immediately released when the accelerator is operated, there is a risk that the engine will start and stall before the driving force is obtained. Although the driving force varies depending on the load, the brakes are controlled in response to a constant output from the piezoelectric element, which has the disadvantage that it is impossible to start the vehicle in an appropriate manner commensurate with the load.

[Purpose of the invention] This invention was made in view of the above circumstances, and its purpose is to eliminate the handbrake: 1 lever, and to release the parking brake before starting the car when the driving force necessary for starting the car is obtained. An object of the present invention is to obtain an automatic vehicle wheel control device with a simple structure that enables safe driving for the first time.

[Summary of the Invention] In order to achieve the above object, the present invention provides a wheel that is movable within a minute range along the wheel, and that is driven by the outer wheel by a short distance due to braking friction. A braking i element for permissible wheel braking, a detection means for detecting forward rotation of the wheel or backward movement of the wheel due to the movement of the braking element due to the driven action, and a detection means for detecting rotation of the wheel in the forward direction or backward movement of the wheel, and The present invention is characterized by comprising a brake 611 means for releasing wheel braking by the braking element in response to a rotation signal and maintaining wheel braking by the braking element in response to a return signal from the detection means. This allows the brakes to be applied automatically until just before the car actually starts moving, and prevents the car from backing up or stalling due to lack of driving force when starting on a slope. This is Shishino.

[Embodiments of the Invention] Hereinafter, a preferred embodiment of the automobile middle wheel control device according to the present invention will be described, taking as an example a case where a disc brake is adopted.
(Explain.

As shown in FIGS. 1 and 2, there is provided a brake 4, a brake 4, and a brake 2, which straddles the disc 1 and constitutes the disk brake 0. As shown in FIGS. The brake lever 11 lever 2 is provided on the fixed side caliber bracket 3 so as to be movable along the circumferential direction of the brake disc 1 of the wheel 4 (within a very small range). In the illustrated example, the brake caliber 2 is provided with an arc-shaped elongated hole 5, and a pin 6 protruding from the fixed side caliber bracket 3 is engaged with the elongated hole 5. .

Therefore, C1 According to this, the braking force 1 within the range of the long diameter of the long hole 5? The river 2 moves by a small distance 1i111 both in the forward rotational direction of the wheel 4 (in the direction of the arrow in the figure) and in the opposite backward rotational direction l\. Therefore, the oil pressure in the brake 1 near lever 2 cylinder is low and pre m: 1: ki 1?
When the river 2 brakes the brake disc 1, the braking friction allows the brake caliper 2 to follow the wheel 4 by a short distance in the same direction.

Such a movable brake caliper 2 may cause rattling when it is not in a braking state, but in order to prevent this, it is desirable to apply a spring to the clearance part. Stopper rubbers 7 are arranged on both sides of the direction.

The brake main 1 flipper 2 constitutes a braking element for wheel braking.

As shown in FIG. 2, a fixed side caliber bracket six ring switch 8 is provided. In the illustrated example, this parking switch 8 is of the brake caliper 2.
It is provided within the moving distance of the middle wheel in the forward rotational direction. When the brake caliper 2 moves away from the parking switch 8 due to movement in the backward rotational direction, the parking switch 8 is turned ON.The parking switch 8 is set to 0N10FFL by the movement of the brake caliper 2, and the brake caliper 2 turns on when the brake caliper 2 moves away from the parking switch 8. When overriding the driven, its 0N10FF
This constitutes a detection means for detecting the rotation of the wheel 4 in the forward direction or the backward movement of the wheel 4. This parking switch 8 is incorporated into a wheel control circuit of an automobile, which will be explained later.

In addition, in Figure 1, 9 out of 12 fangs are Denoarensitrugya, 1
0 (You can get d with the wheel.

Figure 3 is a diagram of the wheel control circuit of an automobile, with reference numeral 11 located inside the transmission 12 and used when backing up.
]OF l: Donaru 1 ~ Ransmitsuyonsuizuji, 1
34; L knot l A brake switch that is linked to the rake pedal and turns on when the foot 1-play-1 pedal is pressed; 14 is a continuous speed switch that is linked to a medium-speed sensor, such as a speedometer, and turns on when the vehicle speed is 10. , 15 is an accelerator switch that is linked to the accelerator pedal and turns OFF when the accelerator pedal is depressed, and 16 is an accelerator switch that is attached to, for example, a shift lever, steering wheel, etc., and has a manual operation automatic return contact that turns ON when operated. It's the brake switch. In addition, 17 sends vacuum from the vacuum pump to the vacuum actuator 18 by its ON operation, and pulls one handle brake wire X7 connected to the brake caliber 2 from the vacuum actuator 18 against the spring in the actuator 18. There is a vacuum switching valve that operates the brake key I7 ripper 2 and holds the brake disc 1 in the braking state.

Next, regarding the wiring, four circuits A, [3, C, and D are connected in parallel between the battery 20 and the above-mentioned bar 1, unit 1, running valve 1741', and powered coil 2'1. Yes, the circuit goes to parking switch 8,
It consists of a series circuit with a relay contact 23, such as the l-transmission switch 11, which is turned on by a self-holding electromagnetic relay coil 22. The circuit No. 13 consists of a series circuit of the Watt brake switch 13 and the vehicle speed switch '14. Further, the C and 0 circuits share an accelerator switch 15, and from this, a first relay contact 25 which is switched and operated by an electromagnetic relay coil 24 for self-protection 1 is also used.
and the parking brake switch 16 are connected in series to form a C circuit, and the second relay contact 2
The one connected from 6 to the electromagnetic relay 21 constitutes a 0 circuit, that is, a self-holding circuit 4S'r. The above handbrake X719.

B: 1. From the vacuum pump 18 and the vacuum switching valve 17, the brake caliber 2 is operated to release or maintain wheel braking (constituting 1 means).

In t, prem in Figure 3: 1 Niki 17 Ripper 2,
Although it is omitted, the oil pipe of the hydraulic braking system that is linked to the foot brake pedal is connected.

The operation of this embodiment having the above configuration will be explained.

FIG. 4 is a rewritten and simplified version of the circuit in FIG. 3 for convenience of explanation. Based on this, the circuit of FIG. We will explain the case of driving in the following four modes.

When the car is stopped during a pitch, the brake pedal is activated via the hydraulic brake system when the foot brake pedal is depressed.
11 River 2 operates and prem: 1: Brakes disc 1 J
As a result, when the automatic vehicle stops on the road, the foot brake switch 13 and vehicle speed switch 14 are both ONI.
8 circuits are closed. By opening these eight circuits, current flows through the coil 21 of the vacuum switching valve 17,
The vacuum switching valve 17 is activated, and the vacuum is sent to the vacuum switch 18, which pulls the handbrake X719 against the force of the spring.

Therefore, in addition to the operation of the brake gear, the parking brake is also in the ON 1/S state. (l-11,,
Even if the foot brake pedal is pressed while the car is running and the foot brake switches 1 to 13 are turned on, the vehicle speed switch 14 is turned off while the car is running.
The circuit is not closed, and the brake and parking brake are not applied to the two cars. It is very dangerous if the parking brake is suddenly applied in such a case.'' (There is a vehicle speed switch 14 in series with the 8 circuits to prevent this risk.)
I'm going to put it in.

When the 8 circuit is opened, no current flows through the C9]] circuit and the electromagnetic relay coils 22 and 24 of the circuit.

When current flows through the electromagnetic relay coil 24 of the 21,Z,C,0 circuit, the electromagnetic relay 30 operates, and its switching contact is switched to the first
Switching from relay contact 25 to second relay contact 26 closes the 0 circuit. The opening of this 0 circuit is self ('A
Since it forms a 46 circuit, it is held until the accelerator switch 15 is turned OFF when the 7/accelerator pedal is pressed, and current is applied to the coil 21 of the vacuum switch valve 17 via the 7/accelerator pedal and the 0 circuit, and the bar is turned off. 1-Turn on the brake.

However, the parking brake is turned on by both the 8 circuit and the 0 circuit, 1:. Therefore, even if you release the footbrake pedal after depressing it by -1α and set the C foot 1 - brake f ts 13 to
Since the circuit continuity is ensured, the parking brake maintains the ONU state.

Next, when current flows through the electromagnetic relay coil 22 of the circuit, the electromagnetic relay 31 is activated, turning on the relay contact 23. When this relay contact 23 is turned on, it turns on (=
When the J-position stud, that is, the parking switch 8 and the transmission switch 1'1 are both turned on, the circuit is closed. Conversely, relay contact 2
3 is ON, even if parking switch 8 and 1 to transmission switch 11/J1 are ON.
) is not opened, and the circuit at that time (parking switch 8 will not turn ON.) This means that if the parking switch 8 is ON L ('
This is because it is extremely dangerous if the A circuit is closed and the parking brake is suddenly applied, so in order to prevent this risk,
7 When the brake switch '15 is ON and the accelerator pedal is released, or when the brake switch '13 is ON (when the brake pedal is pressed from '1 to '1) and the medium speed switch '14 is ON, the car stops. An electromagnetic relay 31, which operates only when the vehicle is running, is inserted in one row in the circuit. In short, the circuit to B, for safety,
Either one of the C or 0 circuits is opened (if it is, it will not be opened.
As shown in the figure, the brake: t: 1r river 2 is pressed in the forward direction of the wheels 4 when the car is stopped, and the parking switch 8 is turned OFF to open a circuit.The brake caliper 2 is pressed. This is because the brake lever 2 is driven by the small wheel 4 and moves in the forward direction of the wheel 4 within the range of its correction.

In this way, cars stop on the road! In case 1, once the foot brake pedal is pressed, the parking brake remains ON even if the brake pedal is released later unless the accelerator pedal is pressed.
The effect of this will become clear as will be explained later, and the circuit becomes energized.

As shown in FIG. By attempting to go back, the brake gear lever 2 moves in the opposite direction and moves away from the parking switch 8, which is interlocked with this and turns on the parking switch 8.The brake gear lever 2 moves in the opposite direction because When the car is stopped, the brake is still in operation (knot brake or parking brake is in operation), and brake-1-17
This is because the river 2 is movable within a permissible range, so when the car tries to lower itself due to its own weight, the wheels 4 follow within the permissible range. Parking switch 8 is ON
Then, since the to circuit is in the energized state, the to circuit is opened and self-maintained by the electromagnetic relay 31 unless gear \7 is put into reverse (if it is set to bank gear, the transmission switch 1 to 11 is turned off). . By opening this circuit, the coil 21 of the vacuum switching valve 17
In addition to the current from the 0 circuit, current is also secured from the UA circuit, and both the Δ and D circuits keep the parking brake in the 0NIA state. The parking brake is applied at the 0 circuit and the vehicle comes to a complete stop.

As shown in Figure 7, when starting a car on the boarding road,
When you press the accelerator pedal, the wheels rotate in the forward direction. When the wheel rotates, the brake disc 1 rotates,
The brake caliper 2 acting on this brake also moves in the same direction within its permissible range, contacts the parking switch 8, and sets it to O[1:. When the parking switch 8 is turned off, the circuit is opened and the parking brake is automatically released. In this case, J3 is)
7 When the accelerator pedal is depressed, the accelerator switch 15 that is linked to it is immediately turned off, so a 0 circuit is formed, and from this the coil 21/ of the vacuum switching valve 17 is
Stop energizing ＼ and cover it. However, when the middle wheel 4 actually moves forward, the brake caliper 2 turns off the parking switch 8.
′? The parking brake is in an operating state until the parking brake is turned on because the parking brake is in a self-holding state and continues to be energized to the pump switching valve 17.

In other words, even if the accelerator pedal is depressed, the parking brake is not immediately released, and the car is only slightly advanced by 6i+1 before the parking brake is released. Therefore, the parking brake is released when the vehicle is started on a slope, and the parking brake is released when the vehicle actually moves and the driving force necessary for the vehicle to start is obtained. Furthermore, when starting the vehicle, the parking brake is automatically released by simply stepping on the brake pedal, so there is no need to operate the foot brake or use the hand brake lever.

In this way, there were people driving cars on the road.
Full-Plegi pedal operation 1' [car still inside]?
The parking brake is used to ensure proper braking in the hydraulic brake system and also to ensure that the parking brake is turned off for safety.
It is possible to prevent this from happening, and it is also possible to automatically turn on the parking brake when the vehicle is stopped.
Furthermore, when restarting from 1 to 1, the parking brake can be automatically released and covered when sufficient starting driving force is obtained.

Therefore, driving during pitching can be carried out extremely smoothly and friendly.

When the automatic vehicle stops on a flat road, it may operate in the same manner as on the above-mentioned uphill road, or there may be other conditions in which the parking brake may not be activated automatically. That is, when the circuit to is closed, of course, the circuit to is closed and - ([3,0 If the circuit is closed, the parking brake [, 1.
It turns on, but then the brake switch 13 turns off.
When the electromagnetic relay 30 is not activated at F and its contact is switched to the first relay contact 25, the parking brake is not ONL because all of the Δ, B, C, and 0 circuits are open. In this case, the bark brake is ON.
The driver of J2 confirms by using an appropriate display means that the vehicle is not in use, and presses the parking brake switch 16 installed in the circuit C. This parking brake switch '1G automatically returns after being pressed. The C circuit is opened at 7 points when J-ru presses Il, and the vacuum switching valve 170 is opened.
): energize +il 21 and turn on the parking brake. Then, instead of the C circuit, the 0 circuit ensures the above-mentioned energization and maintains the operation of the parking brake.

When the vehicle starts, when the accelerator pedal is depressed, the accelerator pedal depression 15 linked therewith is turned off, thereby opening a 0 circuit. By opening this 0 circuit, if the road is uphill, after the wheels 4 have advanced slightly by 11η, and in other cases, the parking play 42 is automatically released.
The car becomes OJ function.

In the case of a car garage located on a flat road like this, it is possible to avoid turning on the parking brake automatically when stopping or by turning the parking prem:1-switch 16 to 1111-if, and then starting again. Automatically turns OFF by pressing the accelerator pedal.・It is possible to override the brake lever operation.

When the car stops on the exit road, the car tries to roll forward due to its own weight, so the brake lever 2 is pushed in the forward direction of the car and always turns the parking switch 8 OFF. , the to circuit is never opened. Therefore, the parking brake is not turned on when the to circuit is turned on, so the parking play 4 is not activated.
- When the driver cannot confirm the operation of the vehicle, the driver presses the parking brake switch 8 to turn on the parking brake, as in the case of the flat road described above. The smell on the way down
C, the driver may put the gear in reverse for safety, but this may cause the transmission light to
) 11 is turned off (>, there is no problem because the parking pre m:1 is not activated by circuit A.

Automatic small valve lt 11. When the accelerator pedal is depressed, the accelerator switch 15 is turned OFF, the 0 circuit is formed, and the parking brake is automatically released, just as in the case of driving on a flat road.

In this way, when driving a vehicle on a drop-off road, the parking brake can be operated, held, and released as easily as on a flat road.

When shifting from the parking brake activated state to reverse, the parking brake is activated under any of the conditions described above, and the activated state is maintained by the A or 0 circuit. 0 circuit, then i' 9 t
The barking brake is immediately released by stepping on the pedal. On the other hand, if it is held by the to circuit,
When the gear is put in reverse, it is linked to this] Herans Mission Ridge 11 becomes OL = F and opens a circuit, and when this circuit is opened, the parking brake is automatically released, and the vehicle can resume reversing. . The reason why the transmission switch 11 is interposed in the six circuits is that when the vehicle is moving backwards, the brake lever 2 moves away from the parking switch 8 as the middle wheel rolls backwards, and the six circuits continue to hold the brake switch 8. This is to prevent +L from this.

In this way, a3 is useful for driving a car when reversing.
The parking brake cannot be automatically released by pressing the accelerator pedal or changing the gear to the reverse position, which inevitably occurs when reversing.

The table below shows the above-mentioned parking operating conditions.

In addition, when stopping the car between length 11 and 1, in this embodiment, the hunt brake wire 719 is not mechanical, but
Since the parking brake is activated and operated by pulling with vacuum pressure, leakage of the vacuum 1:L becomes a problem, but if a highly airtight vacuum switching valve 17 is used, there is no problem.

As described above, according to the above embodiment, the Fregi caliber 2 of the automobile is made movable, its position is detected by a microswitch, and the parking brake is held or released based on the detection result. Particularly when stopping on a boarding road -11,'l l6, there is no need for any device on the driver's car, and the parking brake can be automatically activated until the car actually starts moving the next time, so when the car starts moving. can be carried out in a lively and smooth manner. In addition, by operating the parking brake until the vehicle actually starts moving, it is possible to start the vehicle reliably, regardless of the amount of load it carries.

In addition, in the above embodiment, the brake main flipper of the disc plate 2 was used as an example of the braking element.
This invention is not limited to this, but can also be applied to drum brakes. The brake shoe may be movably supported by the brake shoe.

In addition, Haki 1 is used as the working fluid of )l quaduator '18.
Although an example of a hydraulic pressure system is given above, it is also possible to use compressed air or hydraulic pressure instead.

[Effects of the Invention Above all else, the present invention provides the following excellent effects.

(1) With a simple structure in which the braking element for braking the wheels is movably mounted, it is possible to start the car smoothly on a slope.

(2) Since it is possible to automatically start the car on a slope, the hand rake lever can be eliminated and the space inside the car can be used more effectively.

(3) Since the braking element described in 1.1 of Starting the Car on Slope C is released only when the driving force necessary for the automatic car to start is obtained, it is always reliable regardless of the size of the payload. It is possible to make a quick start.

[Brief explanation of drawings]

The figures are views showing a preferred embodiment of the vehicle's middle wheel brake system 911 according to the present invention, in which Figure 1 is a sectional view of the wheel braking mechanism, Figure 2 is a front view, and Figure 3 is a wheel control system. FIG. 4 is an electric circuit diagram extracted from FIG. 3, and FIGS. 5 to 7 are operational diagrams. In addition, 2 in the figure is an example of a braking element. River, 3 is caliber bracket, 4 is wheel, 5 is slotted hole,
6 is a bottle, 8 is an example of a detection means, and 17, 18 and 19 are examples of a control means, 17 is a vacuum switching valve, 18 is a vacuum actuator, and 19 is a vacuum actuator. Hunt brake wire. Patent 8'1 applicant Nobuo Kinutani, patent attorney representing Isuzu Motors Co., Ltd.

Claims (4)

[Claims] (1) A braking element for wheel braking, such as a braking element for wheel braking, which is movable within a minute range along the wheel and is intended to be driven by a small distance or the wheel due to braking friction. a first stage of detection for detecting the rotation of the wheel in the forward direction or the backward movement of the wheel due to the movement based on the driven movement of the wheel; A small wheel side 911 device for an automobile, characterized by comprising a control means for releasing or maintaining wheel braking. (2) The braking element is a disc brake, and the brake caliper is movable by engaging a pin protruding from the fixed side key 11 lever bracket 1 to one hole in the brake lever m:1. A wheel control device for an automobile according to claim 1, characterized in that the device supports: (3) The braking element is a drum brake, and a long hole is provided on the fixed side thereof, and a hinge pin of the brake shoe is engaged with the long hole to movably support the brake shoe. A small wheel side n11 device for an automobile according to claim 1. (4) contact of the braking element by which the detection means follows the wheel; li. l[Micro switch C that opens and closes by turning
Claims 1 and 2 are characterized in that:
3. The vehicle wheel control device according to item 1 or 3. +51 Special claim 1, characterized in that the control means comprises an actuator that operates the braking element with a working fluid, and a controllable control valve that controls the working fluid of the acticoator. 2nd Jf
j. The vehicle wheel control device according to item 3 or item 4.