KR20020015478A - An automotive brake system for emergency braking function - Google Patents

Abstract

PURPOSE: An emergency braking system of a vehicle is provided to stop the traveling vehicle safely by delaying release time of vacuum for generating brake operating force with atmospheric pressure in stopping an engine suddenly or wrong operation of a vacuum pump. CONSTITUTION: A brake system for a vehicle is composed of a brake(20) having a booster(22) doubling operational force in operating a pedal(21); a vacuum generating unit(10) supplying vacuum to the booster; a conducting unit(30) forming an electrical circuit by connecting to an alternator(2) and a key switch(1); a pressure input unit(40) connected to the conducting unit and the vacuum generating unit to supply atmospheric pressure and vacuum; and a delay unit(50) supplying vacuum to the booster of the brake with atmospheric pressure from the pressure input unit. An atmospheric pressure inflow line(42) is opened and a vacuum inflow line(41) is closed with supplying power to a control vale(42) of the pressure input unit in the engine stop or wrong operation of the alternator. Vacuum supply hours are increased with adding remaining vacuum pressure in the vacuum inflow line of the vacuum generating unit and a fourth chamber(53b) of a second cylinder(53). The vehicle is stopped safely with operating the brake by delaying vacuum release time in an emergency.

Description

An automobile brake system for emergency braking function

The present invention relates to a brake system of a vehicle having an emergency braking function, and more particularly, a vehicle having an emergency braking function that enables the vehicle to be safely stopped even when an engine stops during driving or a malfunction of the alternator as well as a failure of the brake hydraulic pressure. Of the brake system.

In general, except for trucks and buses, which are large vehicles, a brake system for stopping a running vehicle is used as a hydraulic brake system that exerts a braking force by using hydraulic pressure. It consists of a booster that doubles the operating force, a master cylinder, and a front and rear brake assembly that catches and stops the disk of the wheel.

When the driver presses the brake pedal to stop the vehicle, the master cylinder receives hydraulic pressure through the booster while the power is amplified by the pedal's kinematic structure. Will be converted to.

Then, the hydraulic pressure thus converted is transmitted to the brake assembly of each wheel through the brake tube and the proportional valve, and the hydraulic pressure transmitted to the brake assembly is then converted into a force again, that is, the disk of the wheel that rotates the brake friction material, that is, the rotor. Press to generate braking force.

However, such a hydraulic brake system does not amplify the operation force of the brake pedal through the negative pressure of the intake manifold caused by the operation of the engine due to the sudden stop of the engine, or the belt that rotates the alternator when the engine operates normally. Is broken or a breakdown of the vacuum pump itself is a serious problem that can not stop the running vehicle normally.

Of course, the booster of the brake system can decelerate the vehicle speed two to three times even when the engine is stopped while driving, but even in this case, the pedal will not move after the brake pedal is operated two or three times. Of course, the vehicle cannot be stopped normally.

Therefore, the present invention has been invented in view of the above-mentioned matters, and delays the release time of the vacuum that generates the brake operation force when the brake system is not normally used, such as sudden stop of the engine or failure of the alternator or vacuum pump. The purpose is to safely stop a running vehicle.

The present invention for achieving the above object, a brake consisting of a booster for doubling the operating force during pedal operation, the vacuum generating means for providing a vacuum to the booster of the brake, the alternator and the key switch to operate the vacuum generating means A power supply means connected to the IG terminal of the battery and an electric circuit, a pressure inflow means connected to the power supply means and the vacuum generating means to supply vacuum and external atmospheric pressure, and an atmospheric pressure introduced from the pressure inflow means; Characterized in that it comprises a delay means for providing a vacuum to the booster of the brake.

1 is a block diagram of a brake system of a vehicle having an emergency braking function according to the present invention

<Description of the symbols for the main parts of the drawings>

1: Keyswitch 2: Alternator

10: vacuum generating means 11: pump

12: supply line 13: check valve

20: brake 21: pedal

22: booster 30: power supply

31: warning lamp 32: relay

40: pressure inlet means 41: vacuum inlet line

42: air inlet line 43: control valve

44: air filter 50: delay means

51 housing 51 ': partition wall

52,53: 1st and 2nd cylinder

52a, 52b, 53a, 53b: 1, 2, 3, 4 chambers

54: moving member 54a: rod

54b, 54c: piston 55: elastic member

56,57: airtight member 58: air outlet

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a block diagram of a brake system of a vehicle having an emergency braking function according to the present invention, the present invention is a brake 20 made up of a booster 22 to double the operating force when operating the pedal 21, A battery connected to the IG terminal of the alternator 2 and the key switch 1 for operating the vacuum generating means 10 for providing a vacuum to the booster 22 of the brake 20 and the vacuum generating means 10. (B) and an electricity supply means constituting an electric circuit, a pressure inflow means 40 connected to the electricity supply means 30 and the vacuum generating means 10 to supply a vacuum and external atmospheric pressure and the pressure inflow means And a delay means (50) for providing a vacuum to the booster (22) of the brake (20) via the atmospheric pressure introduced from (40).

Here, the vacuum generating means (10) is a pump (11) operated by the alternator (2) connected to charge the battery (B) during the operation of the engine, and the vacuum generated by the pump 11 brakes (20) It consists of a supply line 12 to the booster 22 of the) and a check valve 13 for the one-way flow of the supply line (12).

In addition, the energizing means 30 is a warning lamp 31 connected to the IG terminal and the alternator 2 of the key switch 1 and the power of the battery (B) in accordance with the operation of the warning lamp 31. It consists of the relay 32 which energizes.

In addition, the pressure inflow means 40 for introducing an external atmospheric pressure by the presence or absence of power supply of the electricity supply means 30 is connected to the supply line 12 of the vacuum generating means 10 to the delay means 50. It is connected to the vacuum inlet line 41 for supplying a vacuum, and is connected to the vacuum inlet line 41 through an air inlet line 42 having an air filter 44 according to the power supply of the power supply means 30. It consists of a control valve 43 for introducing the atmospheric pressure of the delay means (50).

In addition, the delay means 50 for introducing the vacuum generated by the pump 11 of the vacuum generating means 10 through the pressure inlet means 40 is a first cylinder for introducing atmospheric pressure through the partition wall 51 '. The housing 51 which consists of the 52 and the 2nd cylinder 53 which introduces a vacuum, and the 1st and 2nd cylinders 52 and 53 of this housing 51 are respectively the 1st and 2nd chambers 52a and 52b. And the first and second cylinders 52 and 53 of the housing 51 and the movable member 54 which are moved according to the introduced pressure so as to change the area while separating into the third and fourth chambers 53a and 53b. Each communication is made of an air outlet 58 for discharging the introduced air.

At this time, the atmospheric input line 42 of the pressure inlet means 40 is connected to the second chamber 52b of the first cylinder 52 and the vacuum input line 41 is the fourth chamber of the second cylinder 53. While connected to the 53b, the air outlet 58 is in communication with the first chamber 52a and the third chamber 53a of the first and second cylinders 52 and 53, of course.

In addition, the movable member 54 is provided with a rod 54a which is moved through an airtight member 57 fixed to the partition wall 51 'of the housing 51 and at both ends of the rod 54a. Pistons 54b and 54c and the first cylinder 52 which separate the two cylinders 52 and 53 into the first and second chambers 52a and 52b and the third and fourth chambers 53a and 53b, respectively. It consists of an elastic member 55 that is compressed and pulled.

At this time, it is a matter of course that the airtight member 57 is provided at both ends of the pistons 54b and 54c which are in contact with and moved to the first and second cylinders 52 and 53.

In addition, the elastic member 55 is of course made of a spring having an elastic force provided in the first chamber (52a) while wrapping the rod (54a) located in the first cylinder (52).

Hereinafter, the operation of the present invention will be described in detail.

When the vehicle is normally operated, the vacuum generated by the pump 11 of the vacuum generating means 10 operated by the alternator 2 is introduced into the booster 22 of the brake 20 via the supply line 912. The vehicle is normally braked according to the operation of the brake pedal 21.

That is, in normal operation, the first and second cylinders 52 and 53 of the delay means 50 are formed along the vacuum inlet line 41 of the pressure inlet means 40. Inflow into the second chamber 52b of the first cylinder 52 and the fourth chamber 53b of the second cylinder 53 so that the movable member 54 maintains an equilibrium state so that the brake 20 This will not affect the operation of the).

At this time, the control valve 42, which is a three-way valve provided in the vacuum inlet line 41 and the atmospheric inlet line 42 of the pressure inlet means 40, the power supply of the power supply means 30 is not energized Of course, the air inlet line 42 is closed to block the inflow of external air.

However, when the engine stops or the alternator 2 does not operate normally, the warning lamp 31 of the energization means 30 connected to the IG terminal of the alternator 2 and the key switch 1 is turned on. The power of the battery B is supplied to the control valve 42 of the pressure inlet means 40 through the relay 32 to open the air inlet line 42 and close the vacuum inlet line 41.

Subsequently, outside air passes through the air filter 44 provided in the air inlet line 42 of the pressure inlet means 40 to the second chamber 52b of the first cylinder 52 of the delay means 50. Since the atmospheric pressure introduced into the second chamber 52b increases the pressure in the second chamber 52b, the piston 54b of the movable member 54 compresses the elastic member 55. While being moved to the first chamber 52a of the first cylinder 52.

As a result, the piston 54c of the movable member 54 located in the second cylinder 53 is moved to the third chamber 53c of the second cylinder 53 to widen the space of the fourth chamber 53b. And finally, the vacuum pressure is introduced into the space of the expanded fourth chamber 53b through the vacuum supply line 41 of the pressure inflow means 40 connected to the supply line 10 of the vacuum generating means 10. .

That is, the fourth chamber 53b of the second cylinder 53 is expanded to be narrowed by the atmospheric pressure into which the first chamber 52a of the first cylinder 52 flows so that the supply line of the vacuum generating means 10 is expanded. The vacuum region existing on (12) is enlarged into the vacuum inlet line 41 of the pressure inlet means 40 and into the fourth chamber 53b of the second cylinder 53 of the delay means 50.

Therefore, when the driver operates the pedal 21 of the brake 20, the second vacuum of the vacuum inlet line 41 and the delay means 50 of the pressure inlet means 40 together with the remaining vacuum pressure of the vacuum generating means 10. The remaining vacuum pressure in the fourth chamber 53b of the cylinder 53 is added to increase the supply time of the vacuum which provides the normal function of the brake 20 and the operation frequency of the brake pedal 21 as compared with the above-described conventional art. This will allow sufficient time to safely stop the vehicle.

At this time, the initial vacuum pressure filled in the first chamber 52a and the third chamber 53a of the first and second cylinders 52 and 53 is transferred to the air outlet 58 by the moving member 54. Of course it is released through.

On the other hand, when the vehicle is normally operated again after stopping the vehicle, that is, when the alternator 2 is normally operated, the warning lamp 31 of the energization means 30 is turned off while the power is cut off. As the atmospheric pressure of the air inlet line 42 is removed, the elastic member 55 of the first cylinder 52 is restored, and the piston 54b of the movable member 54 is pushed toward the second chamber 52b. As the fourth chamber 53b of the cylinder 53 is narrowed, the vacuum pressure of the vacuum generating means 10 continuously introduced in the cylinder 53 keeps the delay means 50 in an equilibrium state and thus does not affect the operation of the brake 20 at all. Of course not.

As described above, according to the present invention, when the brake system is not normally used, such as sudden stop of the engine or failure of the alternator or vacuum pump, the release time of the vacuum required for the brake operation by introducing air having atmospheric pressure from the outside By delaying the operation, the vehicle can be safely stopped by only operating the brakes.

Claims (9)

A check valve 13 connected to the pump 11 which is operated by the alternator 2 to generate a vacuum to the booster 22 of the brake 20 which doubles the operating force when operating the pedal 21 is generated. A vacuum generating means (10) consisting of a supply line (12), an energizing means (30) forming an electric circuit between the alternator (2) and the battery (B), the energizing means (30) and the vacuum generating means Pressure inlet means (40) connected to (10) for supplying a vacuum and external atmospheric pressure and for providing a vacuum to the booster (22) of the brake (20) via the atmospheric pressure introduced from the pressure inlet means (40) Brake system of a vehicle having an emergency braking function composed of a delay means (50). According to claim 1, wherein the power supply means 30 is connected to the IG terminal and the alternator (IG) of the key switch 1 to energize the power of the battery (B) to the pressure inlet means 40 in the event of failure of the alternator (2) 2) and the brake system of the vehicle having an emergency braking function, characterized in that consisting of a relay (32) connected to the battery (B). According to claim 2, wherein the power supply means 30 is provided with a warning lamp 31 is connected between the IG terminal of the key switch (1) and the alternator (2) is turned on when the alternator (2) is broken A brake system of a vehicle having an emergency braking function. The vacuum inlet line (41) of claim 1, wherein the pressure inlet means (40) is connected to a supply line (12) of the vacuum generating means (10) and supplies a vacuum to the delay means (50). The control valve 43 is connected to the line 41 to introduce the external atmospheric pressure into the delay means 50 through the air inlet line 42 provided with the air filter 44 in accordance with the power supply of the power supply means 30 Brake system of a vehicle having an emergency braking function, characterized in that consisting of. The method of claim 1, wherein the retardation means 50 is a housing 51 consisting of a first cylinder 52 for introducing atmospheric pressure through the partition wall 51 'and a second cylinder 53 for introducing the vacuum; The first and second cylinders 52 and 53 of the housing 51 are separated into the first and second chambers 52a and 52b and the third and fourth chambers 53a and 53b, respectively. Emergency braking, characterized in that consisting of the air discharge port 58 for discharging the introduced air in communication with the moving member 54 and the first and second cylinders 52 and 53 of the housing 51, respectively, moved according to the pressure. Brake system of the vehicle with the function. 6. The air input line (42) of the pressure inlet means (40) is connected to the second chamber (52b) of the first cylinder (52) and the vacuum input line (41) is connected to the second cylinder (53). The air outlet 58 is connected to the first chamber 52a and the third chamber 53a of the first and second cylinders 52 and 53, respectively. Brake system of vehicle with emergency braking function. The movable member 54 is provided with a rod 54a which is moved by a partition 51 'of the housing 51, and is provided at both ends of the rod 54a, so that the first and second cylinders ( The pistons 54b and 54c separating the 52 and 53 into the first and second chambers 52a and 52b and the third and fourth chambers 53a and 53b respectively and the first cylinder 52 are compressed and pulled. Brake system of a vehicle having an emergency braking function, characterized in that made of an elastic member (55). The airtight member 57 is provided at both ends of the piston 54b, 54c which contacts the said rod 54a, the partition 51 ', and the 1st, 2nd cylinders 52, 53, and moves. Brake system of a vehicle having an emergency braking function, characterized in that. 8. The emergency member as set forth in claim 7, wherein the elastic member (55) is made of a spring having elastic force provided in the first chamber (52a) in addition to wrapping the rod (54a) positioned in the first cylinder (52). Brake system of vehicle with braking function.