KR200153668Y1 - An oil brake of an electric car - Google Patents
An oil brake of an electric car Download PDFInfo
- Publication number
- KR200153668Y1 KR200153668Y1 KR2019970016563U KR19970016563U KR200153668Y1 KR 200153668 Y1 KR200153668 Y1 KR 200153668Y1 KR 2019970016563 U KR2019970016563 U KR 2019970016563U KR 19970016563 U KR19970016563 U KR 19970016563U KR 200153668 Y1 KR200153668 Y1 KR 200153668Y1
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- KR
- South Korea
- Prior art keywords
- brake
- vacuum pump
- vacuum
- master cylinder
- hydraulic
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
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- 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
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
- B60T13/565—Vacuum systems indirect, i.e. vacuum booster units characterised by being associated with master cylinders, e.g. integrally formed
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- 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
- B60T13/74—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 electrical assistance or drive
- B60T13/745—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 electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- 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
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
Abstract
본 고안은 전기 자동차의 유압 브레이크에 관한 것으로서, 전기 자동차의 브레이크 페달(1)을 밟음으로써 유압을 발생시키는 마스터 실린더(2)가 브레이크 파이프(3)를 매개로 차량 바퀴의 휠 실린더에 연결설치되고, 상기 브레이크 페달(1)의 밟는 힘을 상승시키는 배력장치(4)가 상기 마스터 실린더(2)에 일체로 형성되며, 상기 배력장치(4)의 진공압을 체킹하여 신호를 보내는 센서(5)가 연결관(6)을 매개로 배력장치(4)에 연결설치되고, 상기 센서(5)의 신호를 받는 진공펌프(7)가 배력장치(4)에 진공을 공급하기 위해 연결관(6)의 선단에 설치되며, 상기 진공펌프(7)와는 별도로 보조 진공펌프(8)가 감속기(9)의 회전에 의해 작동되도록 상기 마스터 실린더(2)에 연결설치되고, 상기 보조 진공펌프(8)를 구동하는 감속기(9)를 회전시키도록 작동 모우터(10)가 연결설치된 구조로 되어, 전기 자동차에 사용되는 유압 브레이크의 배력장치에 충분한 진공을 공급할 수 있도록하여 저속이나 정지시의 브레이크 작동을 원할하게 함과 더불어 기존의 진공탱크를 제거함으로써 차체의 설계를 용이하게 할 수 있는 것이다.The present invention relates to a hydraulic brake of an electric vehicle, the master cylinder (2) for generating hydraulic pressure by pressing the brake pedal (1) of the electric vehicle is connected to the wheel cylinder of the vehicle wheel via the brake pipe (3) A sensor 5 for integrally forming a power booster 4 for raising the stepping force of the brake pedal 1 on the master cylinder 2 and checking a vacuum pressure of the power booster 4 to send a signal. Is connected to the power unit 4 via the connecting pipe (6), the vacuum pump (7) receiving the signal of the sensor (5) is connected to the connecting pipe (6) to supply a vacuum to the power unit (4) It is installed at the front end of the vacuum pump (7) and the auxiliary vacuum pump (8) is connected to the master cylinder (2) so as to be operated by the rotation of the reducer (9), the auxiliary vacuum pump (8) An operating motor 10 is connected to rotate the reduction gear 9 for driving. It is designed to be able to supply sufficient vacuum to the hydraulic brake power supply system used in electric vehicles, making it easier to operate the brake at low speed or stop, and to facilitate the design of the vehicle body by removing the existing vacuum tank. It can be.
Description
본 고안은 전기 자동차에 사용되는 브레이크에 관한 것으로서, 특히 유압 브레이크의 제동력을 향상시키는 배력장치의 연결부에 보조 진공펌프를 설치하여 브레이크의 배력장치가 충분한 진공상태를 유지하도록 함으로써 브레이크의 성능을 향상시켜 운전의 안전성을 높여줄 수 있도록 된 전기 자동차의 유압 브레이크에 관한 것이다.The present invention relates to a brake used in an electric vehicle, and in particular, by installing an auxiliary vacuum pump at a connection portion of a booster for improving the braking force of a hydraulic brake, the brake booster maintains a sufficient vacuum to improve the performance of the brake. The present invention relates to a hydraulic brake of an electric vehicle that can increase driving safety.
일반적으로 자동차의 제동 장치는 주행중 자동차의 운동 능력 즉, 관성을 감소시킴으로써 자동차가 원하는 위치에 정지할 수 있게 하는 장치인 바, 이는 주행중에 주로 사용되는 푸트 브레이크와, 자동차를 주차상태로 유지하기 위한 주차 브레이크 및, 감속을 위한 보조 브레이크등으로 구분된다.In general, a braking device of a vehicle is a device that allows the vehicle to stop at a desired position by reducing the motor's kinetic ability, that is, inertia while driving, which is mainly used for driving a foot brake, and to keep the vehicle parked. It is divided into parking brake and auxiliary brake for deceleration.
그리고, 상기 브레이크 장치의 조작기구로는 코드나 와이어를 사용하는 기계식과 유압을 이용하는 유압식이 있지만, 주로 푸트 브레이크에는 유압식이, 주차 브레이크에는 기계식이 사용되고, 또 푸트 브레이크에는 유압식 외에 압축공기를 이용하는 배력식 브레이크 등이 있다.The brake mechanism may be a mechanical type using a cord or a wire or a hydraulic type using a hydraulic pressure, but mainly a hydraulic type for a foot brake, a mechanical type for a parking brake, and a boost type using compressed air in addition to a hydraulic type for a foot brake. Brakes, etc.
한편, 상기한 배력식 브레이크는 브레이크의 제동력을 향상시키기 위해 유압식 브레이크에 배력장치를 설치한 것으로서, 브레이크 페달의 밟는 힘은 같아도 바퀴의 제동력을 수배로 증대시키기 위해 고속주행의 차량이나 중량이 큰 차량을 적은 힘으로 확실히 제동시킬 수 있는 특징이 있다.On the other hand, the above-mentioned hydraulic brake is provided with a hydraulic power to the hydraulic brake in order to improve the braking force of the brake, high-speed vehicles or heavy vehicles to increase the braking force of the wheel several times, even if the brake pedal is equal to the stepping force There is a feature that can be braking sure with little power.
따라서, 상기와 같은 배력식 브레이크를 전기 자동차에 적용하여 사용하게 되는 바, 이는 도 2에 도시된 바와 같이 브레이크 페달(11)을 밟음으로써 유압을 발생시키는 마스터 실린더(12)와, 이 마스터 실린더(12)에 일체로 형성되어 상기 브레이크 페달(11)의 밟는 힘을 상승시키는 배력장치(13), 이 배력장치(13)와 연결관(14)을 매개로 연결되어 배력장치(13)에 진공을 공급하기 위해 센서(15)의 신호를 받는 진공펌프(16) 및, 이 진공펌프(16)의 작동으로 내장된 진공을 상기 배력장치(13)에 공급하는 진공탱크(17)로 이루어진 구조이다.Therefore, the above-described booster type brake is applied to an electric vehicle, which is used as a master cylinder 12 for generating hydraulic pressure by pressing the brake pedal 11 as shown in FIG. It is formed integrally with the 12 and the power supply device 13 for raising the stepping force of the brake pedal 11, the power supply device 13 and the connecting pipe 14 is connected via a medium to the vacuum power to the power supply device (13) The vacuum pump 16 receives a signal from the sensor 15 for supplying, and a vacuum tank 17 for supplying the built-in vacuum to the power supply device 13 by the operation of the vacuum pump 16.
여기서, 상기와 같은 유압식 브레이크의 배력장치(13)는 보다 작은 브레이크 페달(11)의 밟는 힘으로 큰 제동력을 얻기 위하여 진공의 힘을 빌어 브레이크 페달(11)의 밟는 힘을 가볍게 한 것으로서, 브레이크 페달(11)의 밟는 힘의 3-7배 정도의 힘으로 상기 마스터 실린더(12)를 누르도록 되어, 이 마스터 실린더(12)를 누르는 힘이 크면 휠 실린더(도시되지 않음)에 작용하는 힘이 커지고, 큰 제동력이 발생하는 것이다.Here, the hydraulic power boosting device 13 of the above-described hydraulic brake is to lighten the stepping force of the brake pedal 11 through the force of vacuum to obtain a large braking force by the stepping force of the smaller brake pedal 11, the brake pedal The master cylinder 12 is pressed by the force of about 3-7 times the stepping force of (11). When the force pushing the master cylinder 12 is large, the force acting on the wheel cylinder (not shown) increases. , Big braking force is generated.
그런데, 전기 자동차는 그 특성상 공간이 한정되어 있기 때문에 상기와 같이 진공을 공급하기 위해 설치되는 진공탱크(17)의 큰 부피에 의하여 차체 구조의 설계가 상당히 어렵고, 특히 전기 자동차의 저속주행에서는 진공이 용이하게 배력장치(13)에 전달되지 못하기 때문에 브레이크의 성능이 저하되는 문제점이 있었다.However, since the electric vehicle has a limited space due to its characteristics, the design of the vehicle body structure is quite difficult due to the large volume of the vacuum tank 17 installed to supply the vacuum as described above. There is a problem in that the performance of the brake is lowered because it is not easily transmitted to the power supply device (13).
이에 본 고안은 상기한 바와 같은 문제점을 해소하기 위해 안출된 것으로서, 전기 자동차에 사용되는 유압 브레이크의 배력장치에 충분한 진공을 공급할 수 있도록하여 저속이나 정지시의 브레이크 작동을 원할하게 함과 더불어 기존의 진공탱크를 제거함으로써 차체의 설계를 용이하게 할 수 있도록 된 전기 자동차의 유압 브레이크를 제공하는데 그 목적이 있다.In order to solve the problems as described above, the present invention is designed to supply sufficient vacuum to the hydraulic device of the hydraulic brake used in an electric vehicle, thereby making it possible to smoothly operate the brake at low speed or stop. It is an object of the present invention to provide a hydraulic brake of an electric vehicle that can facilitate the design of the vehicle body by removing the vacuum tank.
상기한 바와 같은 목적을 달성하기 위한 본 고안은, 브레이크 페달을 밟음으로써 유압을 발생시키는 마스터 실린더와, 이 마스터 실린더에 일체로 형성되어 상기 브레이크 페달의 밟는 힘을 상승시키는 배력장치, 이 배력장치와 연결관을 매개로 연결되어 배력장치에 진공을 공급하기 위해 센서의 신호를 받는 진공펌프, 이 진공펌프와는 별도로 상기 마스터 실린더에 연결되어 감속기의 회전에 의해 작동되는 보조 진공펌프 및, 이 보조 진공펌프를 구동하는 감속기를 회전시키도록 연결설치된 작동 모우터로 이루어진 구조이다.The present invention for achieving the object as described above, the master cylinder for generating hydraulic pressure by pressing the brake pedal, and a power unit which is formed integrally with the master cylinder to increase the stepping force of the brake pedal, A vacuum pump which receives a signal from a sensor for supplying a vacuum to the power supply unit through a connecting pipe, an auxiliary vacuum pump connected to the master cylinder separately from the vacuum pump and operated by rotation of the reducer, and the auxiliary vacuum It is a structure that consists of a working motor connected to rotate a reducer that drives a pump.
즉, 차량이 저속주행을 하거나 정지할 때에는 이 속도를 감지하는 센서의 작동으로 상기 진공펌프를 작동시켜 배력장치에 진공압을 공급함으로써 제동하게 되고, 차량의 일반적인 주행시에는 상기 작동 모우터에 의해 감속기가 회전하게 됨으로 이 감속기의 회전속도에 따라 작동되는 보조 진공펌프를 이용하여 배력장치에 진공압을 공급함으로써 제동할 수 있도록 된 것이다.That is, when the vehicle runs at low speed or stops, the vacuum pump is operated by supplying a vacuum pressure to the power unit by the operation of a sensor for detecting the speed, and in the normal driving of the vehicle, the reducer is operated by the operation motor. Rotating is able to brake by supplying a vacuum pressure to the power unit by using an auxiliary vacuum pump operated according to the rotational speed of the reducer.
따라서, 상기와 같은 구조에 의해 차량의 정지시에만 진공펌프를 작동시켜 필요한 진공압만을 공급하기 때문에 부피가 큰 진공탱크를 제거하고 저출력의 진공펌프로도 제동이 가능하고, 이에 따라 진공탱크가 사용되는 공간을 용이하게 활용할 수 있는 차체의 설계가 가능해지는 것이다.Therefore, the above structure allows the vacuum pump to be operated only when the vehicle is stopped to supply only the necessary vacuum pressure, thereby eliminating the bulky vacuum tank and allowing braking with a low-power vacuum pump. It is possible to design a vehicle body that can easily utilize the space.
도 1은 본 고안에 따른 전기 자동차용 유압 브레이크의 구성을 개략적으로 나타낸 개략도,1 is a schematic view schematically showing the configuration of an hydraulic brake for an electric vehicle according to the present invention,
도 2는 종래의 기술에 따른 전기 자동차용 유압 브레이크의 구성을 개략적으로 나타낸 개략도이다.2 is a schematic diagram schematically showing a configuration of a hydraulic brake for an electric vehicle according to the related art.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 브레이크 페달 2 : 마스터 실린더1: brake pedal 2: master cylinder
3 : 브레이크 파이프 4 : 배력장치3: brake pipe 4: power supply device
5 : 센서 6 : 연결관5 sensor 6 connector
7 : 진공펌프 8 : 보조 진공펌프7: vacuum pump 8: auxiliary vacuum pump
9 : 감속기 10 : 작동 모우터9: reducer 10: operating motor
이하 본 고안을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 고안에 따른 전기 자동차용 유압 브레이크의 구성을 도시한 개략도로서, 전기 자동차의 브레이크 페달(1)을 밟음으로써 유압을 발생시키는 마스터 실린더(2)가 브레이크 파이프(3)를 매개로 차량 바퀴의 휠 실린더(도시되지 않음)에 연결설치되고, 상기 브레이크 페달(1)의 밟는 힘을 상승시키는 배력장치(4)가 상기 마스터 실린더(2)에 일체로 형성되며, 상기 배력장치(4)의 진공압을 체킹하여 신호를 보내는 센서(5)가 연결관(6)을 매개로 배력장치(4)에 연결설치되고, 상기 센서(5)의 신호를 받는 진공펌프(7)가 배력장치(4)에 진공을 공급하기 위해 연결관(6)의 선단에 설치되며, 상기 진공펌프(7)와는 별도로 보조 진공펌프(8)가 감속기(9)의 회전에 의해 작동되도록 상기 마스터 실린더(2)에 연결설치되고, 상기 보조 진공펌프(8)를 구동하는 감속기(9)를 회전시키도록 작동 모우터(10)가 연결설치된 구조이다.1 is a schematic view showing the configuration of a hydraulic brake for an electric vehicle according to the present invention, wherein a master cylinder 2 for generating hydraulic pressure by pressing the brake pedal 1 of the electric vehicle is a vehicle via a brake pipe 3. It is connected to the wheel cylinder (not shown) of the wheel, and a boosting device (4) for raising the stepping force of the brake pedal (1) is integrally formed in the master cylinder (2), the boosting device (4) The sensor 5 which sends a signal by checking the vacuum pressure of the sensor 5 is connected to the power supply device 4 via the connection pipe 6, and the vacuum pump 7 receiving the signal of the sensor 5 is connected to the power supply device ( The master cylinder (2) is installed at the front end of the connecting pipe (6) to supply a vacuum to 4), and the auxiliary vacuum pump (8) is operated separately by the rotation of the reducer (9) separately from the vacuum pump (7). A reducer 9 connected to the auxiliary vacuum pump 8, Operation motor 10 is configured to be connected to rotate.
즉, 상기와 같이 설치된 유압 브레이크의 작동구조는, 차량이 저속주행을 하거나 정지할 때에는 적은양의 진공압이 필요하기 때문에 이 속도를 감지하는 센서(5)가 작동하게 되고, 상기 센서(5)의 신호로 진공펌프(7)를 작동시켜 배력장치(4)에 진공압을 공급함으로써 제동하게 되며, 차량의 일반적인 주행시에는 휠의 회전력이 크기 때문에 휠의 회전력과 비례하여 상기 작동 모우터(10)가 구동되고, 이 작동 모우터(10)의 구동에 의해 감속기(9)가 회전하게 됨으로써 감속기(9)의 회전속도에 따라 작동되는 보조 진공펌프(8)를 작동시키며, 이러한 보조 진공펌프(8)를 이용하여 배력장치(4)에 적절한 진공압을 공급함으로써 제동할 수 있도록 된 것이다.That is, in the operation structure of the hydraulic brake installed as described above, a small amount of vacuum pressure is required when the vehicle is traveling at low speed or stopped, so that the sensor 5 for detecting this speed is operated, and the sensor 5 By operating the vacuum pump (7) with a signal of the braking by supplying a vacuum pressure to the power unit (4), the driving motor 10 in proportion to the rotational force of the wheel because the rotational force of the wheel is large during normal driving of the vehicle. Is driven, and the reduction gear 9 is rotated by the operation of the operation motor 10 to operate the auxiliary vacuum pump 8 which is operated according to the rotational speed of the reduction gear 9, and this auxiliary vacuum pump 8 It is possible to brake by supplying an appropriate vacuum pressure to the power unit 4 by using).
그리고, 상기 센서(5)에는 센서(5)의 신호로 접속되거나 단락되는 스위치가 내장되어, 상기 센서(5)가 필요한 진공압을 체킹하여 만약 부족할 경우에는 상기 스위치가 접속되어 진공펌프(7)를 작동시킴으로써 상기 배력장치(4)에 진공압을 전달하여 제동할 수 있는 것이다.In addition, the sensor 5 has a built-in switch which is connected or short-circuited by the signal of the sensor 5, and the sensor 5 checks the required vacuum pressure and, if insufficient, the switch is connected to the vacuum pump 7 By operating the vacuum pressure to the power unit 4 can be delivered to the braking.
따라서, 상기와 같이 부피가 큰 진공탱크 대신에 작동 모우터(10)와 감속기(9)를 이용한 보조 진공펌프(8)를 설치하여 저속이나 고속에도 배력장치(4)에 충분한 진공압을 전달할 수 있게 되어, 전기 자동창의 제동력을 향상시켜 주는 것이다.Therefore, by installing the auxiliary vacuum pump 8 using the operating motor 10 and the reducer 9 instead of the bulky vacuum tank as described above, sufficient vacuum pressure can be transmitted to the power supply device 4 even at a low speed or a high speed. It is to improve the braking force of the electric automatic window.
이상에서 설명한 바와 같이 본 고안에 따른 전기 자동차의 유압 브레이크에 의하면, 전기 자동차에 사용되는 유압 브레이크의 배력장치에 충분한 진공을 공급할 수 있도록하여 저속이나 정지시의 브레이크 작동을 원할하게 함과 더불어 기존의 진공탱크를 제거함으로써 차체의 설계를 용이하게 할 수 있는 효과가 있다.As described above, according to the hydraulic brake of the electric vehicle according to the present invention, it is possible to supply a sufficient vacuum to the hydraulic device of the hydraulic brake used in the electric vehicle, thereby making it possible to smoothly operate the brake at low speed or stop. By removing the vacuum tank has an effect that can facilitate the design of the vehicle body.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970016563U KR200153668Y1 (en) | 1997-06-30 | 1997-06-30 | An oil brake of an electric car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970016563U KR200153668Y1 (en) | 1997-06-30 | 1997-06-30 | An oil brake of an electric car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19990002971U KR19990002971U (en) | 1999-01-25 |
| KR200153668Y1 true KR200153668Y1 (en) | 1999-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019970016563U KR200153668Y1 (en) | 1997-06-30 | 1997-06-30 | An oil brake of an electric car |
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| Country | Link |
|---|---|
| KR (1) | KR200153668Y1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100716341B1 (en) * | 2001-05-30 | 2007-05-11 | 현대자동차주식회사 | An automotive vacuum generator using driving windy stream |
| CN115230663B (en) * | 2022-09-02 | 2024-01-09 | 浙江吉利控股集团有限公司 | Vehicle vacuum power-assisted control method, system, device, equipment and storage medium |
-
1997
- 1997-06-30 KR KR2019970016563U patent/KR200153668Y1/en not_active IP Right Cessation
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| KR19990002971U (en) | 1999-01-25 |
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