KR20010077766A - Vacuum generation device of brake booster for vehicle - Google Patents

Vacuum generation device of brake booster for vehicle Download PDF

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Publication number
KR20010077766A
KR20010077766A KR1020000005804A KR20000005804A KR20010077766A KR 20010077766 A KR20010077766 A KR 20010077766A KR 1020000005804 A KR1020000005804 A KR 1020000005804A KR 20000005804 A KR20000005804 A KR 20000005804A KR 20010077766 A KR20010077766 A KR 20010077766A
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KR
South Korea
Prior art keywords
negative pressure
engine
vehicle
brake
pipe
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KR1020000005804A
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Korean (ko)
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김정성
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밍 루
주식회사 만도
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Priority to KR1020000005804A priority Critical patent/KR20010077766A/en
Publication of KR20010077766A publication Critical patent/KR20010077766A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

PURPOSE: A vacuum generating device of a brake servo system is provided to brake a vehicle at sudden acceleration by generating negative pressure sufficiently despite suddenly increasing RPM(Revolutions Per Minute) of an engine at initial start of the engine. CONSTITUTION: Negative pressure is generated in an intake manifold(11) with sucking air by a cylinder of an engine in starting the engine. An inlet of a negative pressure pipe(22) is connected to a bore contraction unit(30) of a suction pipe(12), and the negative pressure in generated in a servo system(20) to brake. The suction force of the negative pressure pipe is increased with connecting the inlet of the negative pressure pipe to the bore contraction unit. Pressure is reduced with increasing flow rate by passing air from the suction pipe through the middle of the bore contraction unit. High negative pressure of the servo system connected to the negative pressure pipe is formed with doubling suction force of the negative pressure pipe through the bore contraction unit in starting the engine to brake efficiently. The vacuum generating apparatus brakes efficiently at sudden acceleration.

Description

차량용 브레이크 배력장치의 진공발생장치{VACUUM GENERATION DEVICE OF BRAKE BOOSTER FOR VEHICLE}VACUUM GENERATION DEVICE OF BRAKE BOOSTER FOR VEHICLE}

본 발명은 차량용 브레이크배력장치의 진공발생장치에 관한 것으로, 더욱 상세하게는 브레이크 배력장치의 진공 발생력이 커져서 제동효과를 더욱 높여주는 차량용 브레이크배력장치의 진공발생장치에 관한 것이다.The present invention relates to a vacuum generator of a vehicle brake power booster, and more particularly to a vacuum generator of a vehicle brake power booster to increase the braking effect by increasing the vacuum generating force of the brake power booster.

일반적으로 차량용 브레이크의 배력장치는 차량 엔진의 흡입행정시에 발생되는 부압(Negative pressure)과 외부압력(Atmospheric pressure)의 차이를 이용하여, 브레이크 페달에 가해진 힘보다 훨씬 큰 힘을 발생시키고, 이 힘을 브레이크 마스터실린더로 전달하여 큰 제동력이 발생되게 하는 장치이다. 따라서 차량에는 이러한 브레이크 배력장치의 동작을 위해, 엔진의 흡기매니폴드와 배력장치의 내부가 연통되는 부압관이 연결된다.In general, the brake booster of the vehicle generates a force much larger than the force applied to the brake pedal by using a difference between negative pressure and atmospheric pressure generated at the intake stroke of the vehicle engine. To the brake master cylinder to generate a large braking force. Therefore, the vehicle is connected to the negative pressure pipe in which the intake manifold of the engine communicates with the inside of the power booster for the operation of the brake power booster.

도 1을 참조하여 설명하면, 차량의 엔진(1) 일측에는 엔진(1) 내부의 다수의 실린더(미도시)로 연소공기를 공급해주도록 다수의 분기관(2a)과 서지탱크(2b)로 이루어진 흡기매니폴드(2)가 결합되고, 이 흡기매니폴드(2)의 일측에는 공기정화장치(3)에서 정화된 외부공기를 흡기매니폴드(2)로 안내하는 흡입관(4)이 설치된다. 또한 흡입관(4)의 중도에는 공기의 흐름량을 제어하는 스로틀밸브(5)가 설치된다. 그리고 흡기매니폴드(2)의 서지탱크(2b) 일측에는 브레이크 배력장치(6)의 내부와 연통되는 부압관(7)이 연결된다. 부호 8은 엔진(1)의 배기구에 연결된 배기매니폴드이다.Referring to FIG. 1, one side of an engine 1 of a vehicle includes a plurality of branch pipes 2a and a surge tank 2b to supply combustion air to a plurality of cylinders (not shown) inside the engine 1. The intake manifold 2 is coupled, and one side of the intake manifold 2 is provided with a suction pipe 4 for guiding the outside air purified by the air purifier 3 to the intake manifold 2. In the middle of the suction pipe 4, a throttle valve 5 for controlling the flow amount of air is provided. One side of the surge tank 2b of the intake manifold 2 is connected to a negative pressure tube 7 which communicates with the inside of the brake booster 6. Reference numeral 8 denotes an exhaust manifold connected to the exhaust port of the engine 1.

이와 같이 구성된 차량은 엔진(1)이 구동될 때, 실린더(미도시)의 내부에서 외기를 흡입하기 때문에 흡기매니폴드(2)의 내부에 부압이 발생되고, 이 부압으로 외기의 흡입이 이루어진다. 또한 이때 배력장치(6)는 부압관(7)을 통해 흡기매니폴드(2)와 연통되어 있기 때문에, 일측 내부에 부압이 발생되어서 브레이크의 제동을위한 배력을 생성할 수 있게 된다.Since the vehicle configured as described above sucks the outside air inside the cylinder (not shown) when the engine 1 is driven, a negative pressure is generated inside the intake manifold 2, and the outside air is sucked in by the negative pressure. In addition, since the power supply device 6 is in communication with the intake manifold 2 through the negative pressure pipe 7, negative pressure is generated inside one side to generate the power for braking of the brake.

그러나 이와 같은 구성을 갖는 차량은 엔진(1)이 정지상태에서 기동된 후 엔진회전수가 급격히 상승할 경우, 흡기매니폴드(2)의 서지탱크(2b)와 배력장치(6)를 연결하는 부압관(7)의 통로저항 등으로 일시적이지만 배력장치(6) 내부에 부압이 생성되지 않는 문제가 있었다. 즉, 배력장치(6) 내부에 부압이 생성되는데는 소정의 시간이 요구되었다. 이로 인해 차량의 급발진 사고가 발생될 경우, 초기에 일시적으로 충분한 제동력이 생성되지 않아, 운전자가 브레이크페달(9)을 밟더라도 차량을 멈출 수 없게 되어 큰 사고의 원인이 되는 문제가 있었다.However, a vehicle having such a configuration has a negative pressure pipe connecting the surge tank 2b of the intake manifold 2 and the power supply device 6 when the engine speed increases rapidly after the engine 1 is started in the stopped state. There was a problem that the negative pressure was not generated inside the power distribution apparatus 6 although it was temporary due to passage resistance or the like of (7). In other words, a predetermined time is required for the negative pressure to be generated inside the power distribution apparatus 6. As a result, when a sudden accident of the vehicle occurs, a sufficient braking force is not temporarily generated initially, so that even if the driver presses the brake pedal 9, the vehicle cannot be stopped, causing a large accident.

본 발명은 이와 같은 문제점을 해결하기 위한 것으로, 본 발명의 목적은 엔진의 초기기동시 엔진회전수가 급상승하는 경우에도 배력장치의 내부에 충분한 부압이 생성되어서 차량의 급발진시 충분한 제동력을 부여할 수 있도록 하는 차량용 브레이크배력장치의 진공발생장치를 제공하는 것이다.The present invention is to solve such a problem, an object of the present invention is to generate a sufficient negative pressure inside the power unit even when the engine speed is rapidly increased during the initial startup of the engine to give a sufficient braking force during sudden start of the vehicle It is to provide a vacuum generating device for a vehicle brake power supply.

도 1은 종래 차량의 엔진 흡기계에 연결되는 배력장치의 개략적인 구성을 보인 도면이다.1 is a view showing a schematic configuration of a power booster connected to the engine intake of a conventional vehicle.

도 2는 본 발명에 따른 차량의 엔진 흡기계에 연결되는 배력장치의 개략적인 구성을 보인 도면이다.2 is a view showing a schematic configuration of a power booster connected to the engine intake of the vehicle according to the present invention.

도 3은 도 2의 "A"부 상세도로, 진공발생장치의 구성을 보인 도면이다.FIG. 3 is a detailed view of part “A” of FIG. 2 and shows a configuration of a vacuum generator.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

10: 엔진, 11: 흡기매니폴드,10: engine, 11: intake manifold,

12: 흡입관, 13: 공기정화장치,12: suction pipe, 13: air purifier,

14: 스로틀밸브, 20: 배력장치,14: throttle valve, 20: hydraulic power unit,

21: 브레이크페달, 22: 부압관,21: brake pedal, 22: negative pressure pipe,

30: 내경축소부.30: Internal reduction part.

상기의 목적을 달성하기 위한 본 발명에 따른 차량용 브레이크 배력장치의 진공발생장치는, 엔진의 흡입구측과 연결되는 흡입유로의 부압(Negative pressure)을 이용하여 배력을 발생시키도록 그 내부공간과 상기 흡입유로를 연통시키는 부압관이 구비된 차량용 브레이크배력장치에 있어서, 상기 흡입유로의 중도에는 벤츄리관 형태의 내경축소부가 마련되고, 상기 부압관의 입구가 상기 내경축소부의 내부와 연통하도록 연결된 것을 특징으로 한다.In order to achieve the above object, a vacuum generating device for a vehicle brake power booster according to the present invention includes the internal space and the suction so as to generate a force using negative pressure of a suction flow path connected to an intake port side of an engine. In the brake booster for a vehicle provided with a negative pressure pipe for communicating a flow path, wherein the suction flow path is provided with an inner diameter reducing portion in the form of a venturi tube, the inlet of the negative pressure tube is connected to communicate with the inside of the inner diameter reducing portion. do.

또한, 상기 부압관의 입구가 유속이 가장 빠른 상기 내경축소부의 내측 중앙에 위치하도록 한 것을 특징으로 한다.In addition, the inlet of the negative pressure pipe is characterized in that it is located in the inner center of the inner diameter reduction portion of the fastest flow rate.

또한, 상기 내경축소부가 상기 흡입유로 상의 스로틀밸브 하류측에 인접하여 배치된 것을 특징으로 한다.Further, the inner diameter reducing portion is disposed adjacent to the throttle valve downstream side on the suction passage.

이하에서는 본 발명에 따른 바람직한 실시 예를 첨부도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the present invention will be described in detail.

본 발명이 적용되는 차량 엔진의 흡기계에는 도 2에 도시된 바와 같이, 엔진(10) 내부의 다수 실린더(미도시)로 연소공기를 공급해주도록 엔진(10)의 흡입구측에 다수의 분기관(11a)과 서지탱크(11b)로 이루어진 흡기매니폴드(11)가 결합되고, 흡기매니폴드(11)의 일측에는 외부의 공기를 서지탱크(11b)의 내부로 안내하는 흡입관(12)이 연결된다. 또 흡입관(12)의 중도에는 외부에서 공급되는 공기를 정화하도록 내부에 필터(13a)가 설치된 공기정화장치(13)가 마련되고, 공기정화장치(13)의 하류측에 공기의 흐름량을 조절하는 스로틀밸브(14)가 설치된다. 미설명부호 15는 엔진(10)의 배기구측에 연결된 배기매니폴드이다.As shown in FIG. 2, the intake system of the vehicle engine to which the present invention is applied includes a plurality of branch pipes on the inlet side of the engine 10 to supply combustion air to a plurality of cylinders (not shown) inside the engine 10. 11a) and an intake manifold 11 composed of the surge tank 11b are coupled, and one side of the intake manifold 11 is connected with a suction pipe 12 for guiding outside air into the surge tank 11b. . In the middle of the suction pipe 12, an air purifier 13 having a filter 13a provided therein is provided to purify the air supplied from the outside, and the flow rate of the air downstream of the air purifier 13 is adjusted. Throttle valve 14 is installed. Reference numeral 15 is an exhaust manifold connected to the exhaust port side of the engine 10.

한편, 차량의 브레이크계에는 차량 엔진(10)의 흡입력에 의한 부압을 이용하여 브레이크페달(21)의 가압력을 증대시킴으로써 큰 제동력을 발생시키는 배력장치(20)가 구비되는데, 이 배력장치(20)의 일측에는 배력장치(20)의 내부공간을 엔진(10)의 흡입유로 내부와 연통시키는 부압관(22)이 설치된다. 즉, 배력장치(20)는 엔진(10)의 흡입력을 통해 발생되는 부압과 대기압의 압력차를 이용하여 배력이 발생되도록 한다. 이때, 본 발명은 부압관(22)이 연결되는흡입관(12)의 중도에 배력장치(20)의 진공 발생력을 더욱 높여주는 진공발생장치가 마련된 것이 특징이다.On the other hand, the brake system of the vehicle is provided with a power booster 20 for generating a large braking force by increasing the pressing force of the brake pedal 21 by using the negative pressure caused by the suction force of the vehicle engine 10, the power booster 20 One side of the negative pressure pipe 22 is installed to communicate with the interior of the suction space of the engine 10, the internal space of the power unit 20. That is, the power booster 20 causes the power boost to be generated using the pressure difference between the negative pressure and the atmospheric pressure generated through the suction force of the engine 10. At this time, the present invention is characterized in that the vacuum generating device is further provided to increase the vacuum generating force of the power unit 20 in the middle of the suction pipe 12 is connected to the negative pressure pipe (22).

도 3을 참조하면, 흡입관의 중도에 마련되는 진공발생장치는 흡입관(12)을 통해 유입되는 외기의 유속이 빨라질 수 있도록 내경이 축소되는 벤츄리관 형태의 내경축소부(30)가 마련되고, 이 내경축소부(30)의 중심부에 부압관(22)의 입구(22a)가 위치하도록 된 것이다. 이때, 내경축소부(30)는 양단의 내경이 흡입관(12)의 내경과 일치하도록 구성되고, 중앙부의 내경이 작아지도록 구성되어 외기가 내경축소부(30)의 중앙부를 통과할 때 유속이 빨라지도록 한 것이다.Referring to Figure 3, the vacuum generating device provided in the middle of the suction pipe is provided with an inner diameter reducing portion 30 of the venturi tube type is reduced in diameter so that the flow rate of the outside air introduced through the suction pipe 12, this, The inlet 22a of the negative pressure pipe 22 is positioned at the center of the inner diameter reducing part 30. At this time, the inner diameter reducing portion 30 is configured so that the inner diameter of both ends and the inner diameter of the suction pipe 12, the inner diameter of the central portion is configured to be smaller so that the flow rate is faster when the outside air passes through the central portion of the inner diameter reducing portion 30 It is to be.

여기서, 내경축소부(30)에 연결되는 부압관(22)의 입구(22a)는 내경축소부(30)의 중앙부 일측을 관통하여 유로의 내부로 연장되며, 그 단부가 내경축소부(30)의 유로 중심에 위치하도록 배치된다. 이는 유속이 가장 빠르고 압력이 낮은 중앙부분에 부압관의 입구(22a)가 위치됨으로써 부압관(22)의 흡입력이 커지도록 한 것이고, 이로써 배력장치(20) 내의 부압이 커지도록 한 것이다.Here, the inlet 22a of the negative pressure pipe 22 connected to the inner diameter reducing part 30 passes through one side of the central portion of the inner diameter reducing part 30 and extends into the passage, and the end portion thereof has an inner diameter reducing part 30. It is arranged to be located in the center of the flow path. This is the inlet 22a of the negative pressure pipe is located in the central portion with the highest flow rate and the low pressure to increase the suction force of the negative pressure pipe 22, thereby increasing the negative pressure in the power unit 20.

다음은 이와 같이 구성된 브레이크배력장치의 진공발생장치 동작을 설명한다.The following describes the operation of the vacuum generator of the brake power booster configured as described above.

차량은 엔진(10)이 구동되면 엔진(10)의 실린더의 내부에서 외기를 흡입하기 때문에 흡기매니폴드(11)의 내부에 부압이 발생되고, 이 부압으로 외기의 흡입이 이루어진다. 그리고 배력장치(20)는 부압관의 입구(22a)가 흡입관(12)의 중도에 마련된 벤츄리관 형태의 내경축소부(30)에 연결되기 때문에, 배력장치(20) 내부에 부압이 발생되어 브레이크의 제동을 위한 배력을 생성할 수 있게 된다.When the vehicle 10 is driven, the vehicle inhales outside air from the inside of the cylinder of the engine 10, so that a negative pressure is generated inside the intake manifold 11, and the outside air is sucked by the negative pressure. And since the inlet 22a of the negative pressure pipe is connected to the internal diameter reduction part 30 of the venturi tube type provided in the middle of the suction pipe 12, the negative pressure is generated inside the power supply device 20, and the brake is carried out. Can generate power for braking.

이때, 본 발명에 따른 배력장치(20)는 부압관(22)의 입구(22a)가 내경축소부(30)의 중앙에 연결되기 때문에 부압관(22)의 흡입력이 커지게 된다. 즉, 흡입관(12)을 통해 유입되는 외기가 내경축소부(30)의 중앙부를 통과하면서 유속이 빨라져 압력이 떨어지게 되므로, 부압관(22)의 흡입력이 커지게 된다. 따라서, 부압관(22)과 연결된 배력장치(20) 내부에는 큰 부압이 걸려 브레이크의 제동을 위한 배력이 종래보다 훨씬 커지게 된다.At this time, since the inlet 22a of the negative pressure pipe 22 is connected to the center of the inner diameter reduction part 30, the suction power of the negative pressure pipe 22 is increased according to the present invention. That is, since the outside air flowing through the suction pipe 12 passes through the center portion of the inner diameter reducing portion 30 and the flow velocity becomes faster and the pressure drops, the suction force of the negative pressure pipe 22 is increased. Therefore, a large negative pressure is applied to the inside of the power supply device 20 connected to the negative pressure pipe 22, so that the power for braking of the brake is much larger than before.

특히, 차량의 엔진(10)이 정지상태에서 기동된 후 엔진회전수가 급격히 상승할 경우, 종래에는 일시적으로 배력장치(20) 내부에 부압이 생성되지 않는 문제가 있었지만, 본 발명은 내경축소부(30)를 통해 부압관(22)의 흡입력이 배가됨으로써, 엔진(10)의 초기 기동시 배력장치(20) 내부에 큰 부압이 생성될 수 있게 된다. 따라서 본 발명이 적용된 차량은 급발진 사고가 발생하는 경우에도 효과적인 제동을 수행할 수 있게 된다.In particular, when the engine speed is rapidly increased after the engine 10 of the vehicle is started in the stationary state, conventionally, there was a problem in that negative pressure was not temporarily generated inside the power supply apparatus 20. However, the present invention provides an inner diameter reduction unit ( As the suction force of the negative pressure pipe 22 is doubled through 30, a large negative pressure can be generated inside the power booster 20 at the initial start of the engine 10. Therefore, the vehicle to which the present invention is applied can perform effective braking even in the case of a sudden rash accident.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 차량용 브레이크배력장치의 진공발생장치는 흡입관의 중도에 벤츄리관 형태의 내경축소부가 마련되고, 이 내경축소부의 중앙부에 배력장치의 부압관이 연결됨으로써, 엔진의 초기 기동시 엔진회전수가 급상승하는 경우에도 최단시간에 배력장치의 부압이 생성되고, 이로써 차량의 급발진시 충분한 제동력을 부여할 수 있는 효과가 있다.As described above in detail, the vacuum generator of the vehicle brake power unit according to the present invention is provided with an inner diameter reducing portion in the form of a venturi tube in the middle of the suction pipe, the negative pressure pipe of the power unit is connected to the center of the inner diameter reducing portion, Even when the engine speed increases rapidly during the initial start of the negative pressure of the power unit is generated in the shortest time, thereby providing a sufficient braking force in the sudden start of the vehicle.

Claims (3)

엔진의 흡입구측과 연결되는 흡입유로의 부압(Negative pressure)을 이용하여 배력을 발생시키도록 그 내부공간과 상기 흡입유로를 연통시키는 부압관이 구비된 차량용 브레이크배력장치에 있어서,In a vehicle brake power supply device provided with a negative pressure pipe for communicating the internal space and the suction flow path to generate a back pressure by using the negative pressure of the suction flow path connected to the inlet side of the engine, 상기 흡입유로의 중도에는 벤츄리관 형태의 내경축소부가 마련되고, 상기 부압관의 입구가 상기 내경축소부의 내부와 연통하도록 연결된 것을 특징으로 하는 차량용 브레이크배력장치의 진공발생장치.The inner diameter reducing portion of the venturi tube type is provided in the middle of the suction flow path, the inlet of the negative pressure pipe is connected to the interior of the inner diameter reducing portion, the vacuum generator of the brake power supply for a vehicle. 제 1항에 있어서,The method of claim 1, 상기 부압관의 입구가 유속이 가장 빠른 상기 내경축소부의 내측 중앙에 위치하도록 한 것을 특징으로 하는 차량용 브레이크배력장치의 진공발생장치.And the inlet of the negative pressure pipe is positioned at the inner center of the inner diameter reducing portion having the fastest flow rate. 제 1항에 있어서,The method of claim 1, 상기 내경축소부가 상기 흡입유로 상의 스로틀밸브 하류측에 인접하여 배치된 것을 특징으로 하는 차량용 브레이크배력장치의 진공발생장치.And said inner diameter reducing portion is disposed adjacent to a throttle valve downstream side on said suction passage.
KR1020000005804A 2000-02-08 2000-02-08 Vacuum generation device of brake booster for vehicle KR20010077766A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030021636A (en) * 2001-09-07 2003-03-15 현대자동차주식회사 An auxiliary vacuum device of an automotive brake system
CN117207054A (en) * 2023-11-09 2023-12-12 靖江市长源液压机械有限公司 Ball grinder for multiway valve with piece self-cleaning function

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JPS60118367U (en) * 1984-01-21 1985-08-10 トヨタ自動車株式会社 Internal combustion engine intake pipe structure
US4899708A (en) * 1987-11-25 1990-02-13 Alfred Teves Gmbh Vacuum-generating device
JPH10115262A (en) * 1996-10-11 1998-05-06 Toyota Motor Corp Intake device for internal combustion engine
KR20000005575A (en) * 1998-06-02 2000-01-25 와다 아끼히로 Apparatus for controlling negative pressure for a brake booster

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60118367U (en) * 1984-01-21 1985-08-10 トヨタ自動車株式会社 Internal combustion engine intake pipe structure
US4899708A (en) * 1987-11-25 1990-02-13 Alfred Teves Gmbh Vacuum-generating device
JPH10115262A (en) * 1996-10-11 1998-05-06 Toyota Motor Corp Intake device for internal combustion engine
KR20000005575A (en) * 1998-06-02 2000-01-25 와다 아끼히로 Apparatus for controlling negative pressure for a brake booster

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030021636A (en) * 2001-09-07 2003-03-15 현대자동차주식회사 An auxiliary vacuum device of an automotive brake system
CN117207054A (en) * 2023-11-09 2023-12-12 靖江市长源液压机械有限公司 Ball grinder for multiway valve with piece self-cleaning function
CN117207054B (en) * 2023-11-09 2024-03-12 靖江市长源液压机械有限公司 Ball grinder for multiway valve with piece self-cleaning function

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