WO2003039928A1

WO2003039928A1 - One wheel brake system of automobile

Info

Publication number: WO2003039928A1
Application number: PCT/KR2002/002060
Authority: WO
Inventors: Byung-Kug Lee
Original assignee: Byung-Kug Lee
Priority date: 2001-11-05
Filing date: 2002-11-05
Publication date: 2003-05-15
Also published as: KR100420199B1; KR20030037961A

Abstract

In the typical vehicle's systems, when the vehicle stops, a driver must push the brake pedal or repeat the pull and push of the hand brake. This invention for convenient driving is the compensating apparatus of the function of the one wheel brake system. It operates automatically the actuator of the one wheel brake system when the vehicle stops, so a driver doesn't need to bother himself to push the brake pedal or to pull the hand brake. As the mean for practicing above function, this invention supplements several apparatus into the existing one wheel brake system which I invented. That is, by attaching the locomotive sensor perceiving the vehicle's stop, the actuator of the existing one wheel brake system operates automatically. In addition, by installing the accelerator contact switch when the vehicle starts or is in the movement, the power source to the actuator is cut, so the driver doesn't need to push the brake pedal or to pull the hand brake.

Description

ONE WHEEL BRAKE SYSTEM OF AUTOMOBILE

TECHNICAL FIELD

This invention is the compensating apparatus of the function of the one wheel brake system (International application No. PCT/KROO/

00745) which I invented previously. It is the apparatus for convenient driving. It operates automatically the actuator of the one wheel brake system when the vehicle is waiting for a green light or it stops and a driver doesn't need to bother himself to push the brake pedal or to pull the hand brake.

BACKGROUND ART

In the typical vehicles' systems, when the vehicle is waiting for a green light, stops for a little while, or repeats stops and slow move, a driver must push the brake pedal or repeat the pull and push of the hand brake, and if the road is steep sloping ground, the foot brake should be pushed down to compensate the insufficient breaking power of the hand brake. It is necessary measures for safety but it is very troublesome work for the driver to do so. Its reason is, as we know, that if any thing

1 between both the foot brake and the hand brake isn't operated, there is a

I possibility of danger that the vehicle could move. In addition, when the hand-operated transmission vehicle start after stop, there are a number of a minor collision because the vehicle slides backwardly for the lacks of

I experience and driving skill of the driver. Although various methods have

1 been designed to solve this problem, they have not yet been put to practical use because of the various difficulties. Recently after the popularization of the automatic transmission vehicle, the great part of this problem was solved but still the start on the sloping ground requires attentions to drivers of the hand-operated transmission car.

DISCLOSURE OF INVENTION ,

As the mean for solving above problem, the one wheel brake system (International application No. PCT/KROO/ 00745) which I invented previously could solve the great part of this problem. But there are some problems in the existing one wheel brake system of automobile. First, when stop, as FIG. 1 is showing, the driver should connect with the select switch(a5) by pushing the switch which is attached on the dashboard in order to operate the actuator(C) of the one wheel brake system. By doing that, it happened the same effect with driver's pushing the foot brake without the effort of pulling the hand brake but this is also troublesome work to drivers. Second, in case of the hand-operated transmission vehicle, the driver should operate the clutch and the accelerator pedal and cut the select switch (a5) at the same time for the vehicle not to be pushed backwardly for the start of sloping ground.

There - are also considerable problems because four action including the steering wheel should be performed simultaneously.

In this invention, I cleared such inconvenience of drivers by improving and supplementing several apparatus into the existing one wheel brake system (International¹ application No. PCT/KROO/ 00745) which I invented previously to solve those problems. That is, by attaching the locomotive sensor perceiving the vehicle' stop, the actuator of the existing one wheel brake system operates automatically without the driver's handling, so it gives the perfect braking state such as driver' s pushing the foot brake firmly. In addition, by installing the accelerator contact switch when the vehicle starts or is in the movement, the power source to the actuator is cut, so the driver could drive the vehicle as usual. Moreover, in case of the hand-operated transmission vehicle, if the driver pushes the accelerator for the start of sloping ground, the function of the actuator is halted and the function of brake goes away and the vehicle can start safely without being pushed backwardly only with the operation of the clutch and the accelerator pedal. Therefore, the driver could drive the vehicle as he start it on the even ground. So, this invention is the epoch-making apparatus in which the driver could drive conveniently without operating the hand brake when driving. Because when the vehicle is stopped by being pushed the brake, it maintains perfect braking though the driver takes away the foot on the brake without pulling the hand brake, when the driver stepped on the accelerator for locomotion, the braking function is released automatically. Additionally with the new function, there is no trouble with the function of the existing one wheel brake system to minimize the turning radius of a vehicle.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 is a view of the electronic circuit of the existing one wheel brake system; and

Figure 2 is a view of the electronic circuit of the present invention;

■ ^Explanation of the Individual part in the Drawings al ~a4 : select switches A1 — A4 : fluid line cut-off units OR1 - OR5 : OR gates ' AND1 -AND2 : AND gates

1 brake lamp contact switch 2 speed sensor contact switch

I

3 brake pedal contact switch 4 locomotive sensor contact switch 5 accelerator contact switch

BEST MODE FOR CARRYING OUT THE INVENTION

This invention is to solve the technical problem previously

1 described. The detail explanation with the attached figures is as follows. The difference between the circuit FIG. 1 of the existing one wheel brake system and the circuit FIG. 2 which is the figure of this invention is not so much. According to the circuit FIG. 2, the circuit which is from the select switch al ~a4 to the AND gate(AND 1) power-source to actuator(C) is made simple greatly, the brake pedal contact switch(3) instead of the brake lamp contact switch(l) is installed. The brake lamp contact switch(l) in FIG. 1 instead of brake pedal contact switch(3) is used and there is no difference when used the inverter(NOT⁾ and the OR gate(OR 6). But the circuit is safer when simpler because the more complex circuit is, the more risky the fault is. There is no difference in the place that the brake pedal contact switch is placed from the brake pedal to the front of the booster. But there should be a prescribed gap in the brake pedal contact switch in order to maintain the regular remained hydraulic pressure in the master cylinder when the actuator(C) is operated. The reason will be explained later. The brake pedal contact switch(2) of FIG. 2 is designed to allow power of low to the AND gate(AND 1) when the brake pedal is pushed. Therefore, the one-sided output power which ^' is connected to battery (B) allows power of high to the AND gate(AND 1) when the driver steps down more than the prescribed gap of brake pedal contact switch from the brake pedal. And the other- sided output connected from the battery

1 allows- power of high to the AND gate(AND 1) through the speed sensor contact switch(2) in the only • case which is under the certain speed (selected about 20 Km/h). Then AND gate(AND 1) supplies power

I of high to the select switches al ~a4 and the actuator(C) only when the two conditions that the driver basically steps down from the brake pedal

I and the speed should be under the set speed which is set around 20km/h

I are met. When the driver is going to brake one wheel out of four wheels, he could select one(eχ: al) out of four select switches(al ~a4), the allowed power of high provides power to actuator(C) through OR5 and creates hydraulic pressure. And at the same time provided power to

OR2 — OR4 operates the fluid line cut-off units(A2 ~A4)₇ it makes the hydraulic pressure selectively only to the connected to the wheel Al and accomplishes the original purpose of the one wheel brake system. And when the driver does not select the select switch, the allowed output of high in AND gate(AND 1) and the locomotive sensor contact switch(4) that if the speed is zero, makes the power on and if the speed is more than zero, makes the power off and the accelerator contact switch(5) that if the driver doesn't step on the accelerator, makes the power on and if the driver step on the accelerator, makes the power off, are connected parallel to AND gate(AND 2). AND gate(AND 2) supplies electric power of high only when the two conditions are satisfied that the speed is zero and the driver doesn't step up the accelerator and the supplied electric power operates the actuator through OR 5 and creates hydraulic pressure. Therefore when the vehicle is in the locomotive state, at any time except the situation that the driver connects the select switch to operate the one wheel brake system, the actuator doesn't operate.

In conclusion, except the case that the driver selects the select switch to operate the one wheel brake system, the actuator creates hydraulic pressure only when the four conditions are met. First, the driver should not step on the brake pedal. Second, the speed should not exceed previously set speed. Third, the speed should be zero. Fourth, the driver should not step on the accelerator pedal. The case that the four conditions are met has only one case. That is when the driver steps down from the brake pedal conveniently for the stop of vehicle such as waiting for a green light. So the driver is released from the troublesome of pulling and pushing the hand brake during stop.

Among above the contact switch, the locomotive sensor contact switch has no functional defect where it is installed speedometer, a telemeter, drive line or any other place. Only there is no problem if it perceives the motion of vehicle. Equally, if the accelerator contact switch could perceive that the driver step on the pedal, the place that it is installed is no difference in functional defect.

On the other side, the reason that there should be prescribed gap is that the vehicle should not be pushed from the stop on the sloping ground to the operation of the actuator by putting a regular remained pressure. And because, in case of the automatic transmission vehicle, when the transmission is put on the driving position, the vehicle could move with the basic RPM. When stop of the vehicle and selection of the one wheel braking, the vehicle could maintain semi-braking state in order not to move by only the basic RPM.

The vehicle which is installed with this invention gives convenience for the driver because the driver does not need to step on the foot brake or push and pull the hand brake when stop for waiting the green light and so on beside giving the original function of the one wheel brake system minimizing the turning radius of the vehicle. At the same time in case of hand -operating transmission vehicle, it gives the more convenient driving condition by preventing being pushed backwardly on the sloping ground. Thus'

Claims

WHAT IS CLAIMED IS:

1. An one- wheel brake system ^■• for a vehicle comprising: an one-sided output of battery(B) is inputted to the AND gate(AND 1) through the brake pedal contact switch(3), the other-sided output of battery is inputted to the AND gate(AND 1) through the speed sensor contact switch(2); the output of AND gate(AND 1) is inputted to the select switches(al ~a4), the locomotive sensor contact switch(4) and the accelerator contact switch (5);

^■ a locomotive sensor contact switch(4) and the accelerator contact switch(5) is inputted parallel to the AND gate(AND 2); one-sided output of the select switches(al ~a4) and the output of the AND gate(AND 2) is inputted to the OR gate(OR 5), so the output of it is inputted to the actuator(C); an other-sided output of the select switch is inputted to the OR gates(OR l ~ OR 4); and ^' the output of the OR gates(OR l ~ OR 4) is inputted to the fluid line cut-off units(Al ^~~A4), so that the hydraulic pressure created in the master cylinder generated from the actuator(C) is sent to the selected wheel or all wheels via the fluid line cut-off units.