KR0138271Y1 - Negative pressure generator for electric vehicles - Google Patents
Negative pressure generator for electric vehicles Download PDFInfo
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- KR0138271Y1 KR0138271Y1 KR2019950021407U KR19950021407U KR0138271Y1 KR 0138271 Y1 KR0138271 Y1 KR 0138271Y1 KR 2019950021407 U KR2019950021407 U KR 2019950021407U KR 19950021407 U KR19950021407 U KR 19950021407U KR 0138271 Y1 KR0138271 Y1 KR 0138271Y1
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- Prior art keywords
- negative pressure
- motor
- pump
- electric vehicle
- vacuum
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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
- 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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
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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
- B60T13/12—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 liquid
- B60T13/14—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 liquid using accumulators or reservoirs fed by pumps
- B60T13/142—Systems with master cylinder
- B60T13/145—Master cylinder integrated or hydraulically coupled with booster
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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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
차량의 정상 주행시 뿐만 아니라, 정차시에도 부압을 제공할수 있는 전기 자동차용 부압 발생장치는 진공탱크 내의 압력을 검출하는 압력 감지센서의 신호에 따라 제어신호를 보내는 제어기와, 전기 자동차를 구동하는 메인 구동모터에 부착된 하우징과, 제어기에서 전달되는 신호에 따라 작동되며, 하우징 내에 회동 가능하게 장착된 모터와, 모터에 의해 구동되는 것으로, 일방향 클러치를 개재하여 메인 구동모터의 회전에 따라 구동되는 메인 구동축과 선택적으로 계합하는 펌프구동축과, 이 펌프 구동축의 회전에 의해 부압을 생성하는 것으로, 생성된 부압은 진공 파이프를 통해 상기 진공탱크로 압송하는 진공펌프로 구성되며, 정차시 및 저속 주행시에는 진공펌프용 구동모터에 의해, 정상 주행시에는 전기 자동차용 구동모터에 의해 진공펌프를 작동시켜 부압을 얻는다.The negative pressure generator for an electric vehicle, which can provide negative pressure not only during normal driving but also when the vehicle is stopped, includes a controller that sends a control signal according to a signal of a pressure sensor that detects a pressure in a vacuum tank, and a main drive that drives an electric vehicle A main drive shaft driven by a rotation of the main drive motor via a one-way clutch, which is driven by a housing attached to the motor, a motor driven by a signal transmitted from the controller, and rotatably mounted in the housing, and driven by the motor. And a pump drive shaft that is selectively engaged with the pump drive shaft, and a negative pressure is generated by the rotation of the pump drive shaft, and the generated negative pressure is composed of a vacuum pump which is pumped through the vacuum pipe to the vacuum tank. Drive motor, and during normal driving the vacuum pump is driven by the electric motor drive motor Operate to obtain negative pressure.
Description
제1도는 종래의 전기 자동차용 부압 발생장치의 구성도.1 is a configuration diagram of a negative pressure generator for a conventional electric vehicle.
제2도는 본 고안의 전기 자동차용 부압 발생장치의 구성도.2 is a configuration of the negative pressure generator for an electric vehicle of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 브레이크 페달 2 : 부우스터1: brake pedal 2: booster
10 : 진공탱크 24 : 제어기10: vacuum tank 24: controller
26 : 전기자동차용 구동모터 32 : 하우징26: drive motor 32: housing
34 : 진공펌프용 구동모터 36 : 펌프 구동축34: drive motor for vacuum pump 36: pump drive shaft
38 : 메인 구동축 40 : 진공펌프38: main drive shaft 40: vacuum pump
50 : 원웨이 클러치 60 : 체크밸브50: one-way clutch 60: check valve
본 고안은 전기 자동차용 부압 발생장치에 관한 것으로, 더욱 상세하게는, 정차시 및 저속 주행시에는 진공펌프용 구동모터에 의해 부압을 얻고, 정상 주행시에는 전기 자동차용 구동모터의 회전력을 이용하여 진공펌프를 작동시켜 생성된 부압을 보조 제동력을 얻는 전기 자동차용 부압 발생장치에 관한 것이다.The present invention relates to a negative pressure generating device for an electric vehicle, and more particularly, a negative pressure is obtained by a driving motor for a vacuum pump at a stop and at a low speed, and a vacuum pump using a rotational force of the driving motor for an electric vehicle during a normal driving. It relates to a negative pressure generator for an electric vehicle that obtains the auxiliary braking force generated by operating the negative pressure.
현재의 화석 연료를 사용하고 있는 가솔린 기관을 비롯한 대부분의 내연기관에서는 실린더 내에서 연료를 연소시킨 다음, 이때 발생하는 열에너지를 동력원으로 이용하고 있다. 이러한 기관에서는 연소후 다량의 유해가스가 방출되어 대기를 오염시키게 되며, 배기가스중의 유해성분을 줄이려는 각종 정화장치가 개발되고 있다. 그러나, 이같은 정화장치의 정화 능력에는 한계가 있으며, 배기가스에 함유된 유해성분을 완전히 제거하는 것은 어렵다.Most internal combustion engines, including gasoline engines using current fossil fuels, burn fuel in a cylinder and then use the thermal energy generated as a power source. In these engines, a large amount of harmful gas is emitted after combustion to contaminate the air, and various purification apparatuses for reducing harmful components in exhaust gas have been developed. However, the purification ability of such a purification device is limited, and it is difficult to completely remove the harmful components contained in the exhaust gas.
석유자원의 감소 및 배기가스에 의한 공해문제를 해결하기 위한 방안으로, 배기가스의 발생이 전혀 없는 전기 자동차(electric vehicle)에 대한 개발이 진행되고 있다. 전기 자동차의 개략적인 구성을 보면, 가솔린 자동차의 가솔린 연료에 해당하는 축전지가 있으며, 축전지에서 제공되는 에너지를 보다 효율적으로 제어하는 제어장치 및, 공급되는 전기에 의해 회전하여 동력을 발생하는 전동기와, 이 전동기의 회전으로 얻어진 동력을 이용하여 차량을 구동하는 구동장치로 대별할 수 있으며, 감속 및 정차시 제동력을 얻는 브레이크 장치가 사용되고 있다.In order to solve the pollution problem caused by the reduction of petroleum resources and the exhaust gas, the development of an electric vehicle (electric vehicle) that does not generate any exhaust gas is in progress. A schematic configuration of an electric vehicle includes a storage battery corresponding to a gasoline fuel of a gasoline vehicle, a controller for more efficiently controlling the energy provided by the storage battery, a motor that rotates and generates power by the supplied electricity, It is possible to roughly classify a driving device for driving a vehicle by using the power obtained by the rotation of the electric motor, and a brake device that obtains a braking force during deceleration and stopping is used.
제1도는 종래의 전기 자동차용 부압 발생장치의 구성도로, 이것은 통상의 브레이크 페달(1)과, 밧데리(3)의 전원에 의해 회전하면서 진공을 발생시키는 진공펌프(4)와, 진공펌프(4)에서 만들어진 진공에 의해 브레이크 페달(1)의 조작력을 가볍게하는 부우스터(2)로 구성되어 있으며, 운전자가 브레이크 페달(1)을 밟으면 부우스터(2)내부의 부압과 대기압의 압력차로 인해 생기는 배력작용에 의해 마스터 실린더(5)내에 설치된 피스톤(도시 생략)이 가압되고, 가압된 브레이크 오일은 파이프(7), (8)를 통해 각각의 바퀴로 공급되어 제동력을 얻게 된다.1 is a configuration diagram of a conventional negative pressure generator for an electric vehicle, which is a vacuum pump 4 for generating a vacuum while rotating by a power source of a normal brake pedal 1 and a battery 3, and a vacuum pump 4 It is composed of a booster (2) to lighten the operating force of the brake pedal (1) by the vacuum produced in the), and when the driver presses the brake pedal (1), the pressure difference between the negative pressure and the atmospheric pressure inside the booster (2) The piston (not shown) installed in the master cylinder 5 is pressurized by the back action, and the pressurized brake oil is supplied to the respective wheels through the pipes 7 and 8 to obtain braking force.
이러한 구성을 갖는 종래의 브레이크 장치에서는 초기 차량의 기동시, 부우스터가 정상적으로 배력작용을 하기 위해서는 약간의 대기시간을 필요로 하며, 짧은 시간 내에 많은 공기를 흡입해야 하므로 진공펌프의 모터가 커야하며, 주행중에도 모터는 항상 작동되기 때문에 소음이 발생되는 문제가 있다.In the conventional brake device having such a configuration, when the initial vehicle is started, the booster requires a little waiting time for the normal boosting operation, and a large amount of air must be sucked within a short time, so the motor of the vacuum pump must be large. Since the motor is always running even while driving, there is a problem that noise is generated.
상술한 문제를 감안하여 본 고안은 정상 주행시에는 전기 자동차를 구동하는 메인 구동모터의 회전력을 이용하여 부압을 얻는 한편, 정차시 및 저속 주행시에는 진공펌프용 구동모터의 회전력을 이용하여 부압을 얻는 구조의 전기 자동차용 부압 발생장치를 제공하는데 그 목적이 있다.In view of the above problems, the present invention obtains the negative pressure by using the rotational force of the main drive motor for driving the electric vehicle during normal driving, while the negative pressure is obtained by using the rotational force of the driving motor for the vacuum pump during the stop and low speed driving. The purpose of the present invention is to provide a negative pressure generator for an electric vehicle.
상술한 본 고안의 목적은 진공탱크에서 전달되는 부압과 대기압 간의 압력차를 이용하여 브레이크 페달의 조작력을 가볍게 하는 부우스터가 장착된 전기 자동차용 브레이크에 있어서, 진공탱크 내의 압력을 검출하는 압력 감지센서의 신호에 따라 제어신호를 보내는 제어기와, 전기 자동차를 구동하는 메인 구동모터에 부착된 하우징과, 제어기에서 전달되는 신호에 따라 작동되며, 하우징 내에 회동 가능하게 장착된 모터와, 모터에 의해 구동되는 것으로, 일방향 클러치를 개재하여 메인 구동모터의 회전에 따라 구동되는 메인 구동축과 선택적으로 계합하는 펌프 구동축과, 펌프 구동축의 회전에 의해 부압을 생성하는 것으로, 생성된 부압은 진공 파이프를 통해 진공탱크로 압송하는 진공펌프를 포함하는 것을 특징으로 하는 전기 자동차용 부압 발생장치에 의해 달성된다.An object of the present invention described above is a pressure sensor for detecting pressure in a vacuum tank in a brake for an electric vehicle equipped with a booster for lightening the operating force of a brake pedal by using a pressure difference between a negative pressure and an atmospheric pressure transmitted from a vacuum tank. A controller that sends a control signal according to the signal of the motor, a housing attached to the main drive motor for driving the electric vehicle, a motor operated according to a signal transmitted from the controller, and rotatably mounted in the housing, and driven by the motor. The negative pressure is generated by the rotation of the pump drive shaft and the pump drive shaft selectively engaged with the main drive shaft driven by the rotation of the main drive motor via the one-way clutch, and the generated negative pressure is transferred to the vacuum tank through the vacuum pipe. Negative pressure foot for electric vehicles, characterized by comprising a vacuum pump for pumping It is achieved by the device.
다음에는 첨부된 도면을 참고로 본 고안의 바람직한 실시에 따른 전기 자동차용 부압 발생장치에 대하여 상세히 설명하기로 한다.Next, a negative pressure generator for an electric vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
제2도는 본 고안의 전기 자동차용 부압 발생장치의 구성도이다.2 is a configuration diagram of a negative pressure generator for an electric vehicle of the present invention.
먼저, 통상의 브레이크 장치는 제1도에서 설명한 바와 같이, 브레이크 페달(1)과, 브레이크 페달(1)의 조작시 진공탱크(10)에서 공급되는 부압에 의해 배력작용을 하는 부우스터(2)와, 각 휘일로 브레이크 오일을 공급하는 마스터 실린더(5)로 구성되며, 진공탱크(10)에 부압을 공급하기 위한 장치로 아래와 같이 구성된 부압 발생장치가 있다.First, the conventional brake device, as described in FIG. 1, the booster 2 which acts by the negative pressure supplied from the brake pedal 1 and the vacuum tank 10 when the brake pedal 1 is operated. And a master cylinder 5 for supplying brake oil to each wheel, and a negative pressure generator configured as follows as a device for supplying negative pressure to the vacuum tank 10.
본 고안의 부압 발생장치는 대략, 진공탱크(10) 내의 압력을 검출하는 압력 감지센서 신호(12)와, 전기 자동차용 구동모터(26)의 회전수를 검출하는 구동 모터 회전수센서(14)와, 차량의 주행속도를 검출하는 차속센서(16)에서 전달되는 각종 신호에 따라서, 진공펌프용 구동모터 신호(18)와, 대기압밸브 신호(20)및 고장 경보등 신호(22)등의 제어 신호를 보내는 제어기(24)에 의해 제어되며, 이 제어에 따라 전기자동차를 구동하는 메인 구동모터(26)의 회전에 따라 선택적으로 회동하여 진공을 생성하는 진공펌프용 구동모터(34)로 구성된다.The negative pressure generator of the present invention has a pressure sensor sensor signal 12 for detecting pressure in the vacuum tank 10 and a drive motor rotation speed sensor 14 for detecting rotation speed of the electric motor driving motor 26. And control signals such as a vacuum pump driving motor signal 18, an atmospheric pressure valve signal 20, a failure warning light signal 22, and the like according to various signals transmitted from the vehicle speed sensor 16 for detecting the traveling speed of the vehicle. It is controlled by a controller 24 for sending a, it consists of a drive motor 34 for the vacuum pump to generate a vacuum by selectively rotating in accordance with the rotation of the main drive motor 26 for driving the electric vehicle according to this control.
보다 상세히 살펴보면, 상기 제어기(24)에서 전달되는 진공펌프용 구동모터 신호(18)에 따라 작동되며, 하우징(32)내에 회동 가능하게 장착된 모터(34)와, 이 모터(34)에 의해 구동되는 것으로, 일방향클러치(50)를 개재하여 상기 메인 구동모터(26)의 회전에 따라 구동되는 메인 구동축(38)과 선택적으로 계합하는 펌프 구동축(36)과, 이 펌프 구동축(36)의 회전에 의해 부압을 생성하는 것으로, 생성된 부압은 진공 파이프(54)를 통해 상기 진공탱크(10)로 압송하는 진공펌프(40)로 이루어져 있다.In more detail, the motor 34, which is operated according to the driving motor signal 18 for the vacuum pump transmitted from the controller 24, is rotatably mounted in the housing 32, and driven by the motor 34. The pump drive shaft 36 selectively engages with the main drive shaft 38 driven in accordance with the rotation of the main drive motor 26 via the one-way clutch 50, and the rotation of the pump drive shaft 36. By generating the negative pressure, the generated negative pressure is composed of a vacuum pump 40 for pumping the vacuum tank (10) through the vacuum tank (10).
여기에서, 펌프 구동축(36)은 하우징(32)의 양단을 관통하여 연장 설치되며, 다수의 베어링(42),(44)에 의해 회동 가능하게 설치된다. 또한, 이 펌프 구동축(36)에는 메인 구동모터(26)에 장착된 구동기어(28)와 치합되어 동력을 전달받는 피동기어(30)가 장착되어 있으며, 일방향 클러치(50)의 작용에 의해 메인 구동모터(26)의 회전력을 전달받는다.Here, the pump drive shaft 36 extends through both ends of the housing 32 and is rotatably installed by a plurality of bearings 42 and 44. In addition, the pump drive shaft 36 is equipped with a driven gear 30 meshed with the drive gear 28 mounted on the main drive motor 26 to receive power, and the main shaft is driven by the action of the one-way clutch 50. The rotational force of the driving motor 26 is received.
하우징(32)에는 진공펌프(40)에서 발생된 부압을 대기로 방출하는 배출포트(58)와, 제어기(24)에 의해 개폐되는 대기압 밸브(52)의 작동에 의해 대기압을 선택적으로 흡입하는 유입포트(56)가 형성되어 있으므로, 진공탱크(10)내에 충분한 부압이 형성되면 유입포트(56)를 통해 대기를 유입하여 진공펌프(40)를 공회전 시킴으로써 진공펌프용 구동모터(34)의 부하를 감소시킨다.The housing 32 has an inlet for selectively inhaling atmospheric pressure by the operation of a discharge port 58 for discharging the negative pressure generated by the vacuum pump 40 to the atmosphere and an atmospheric pressure valve 52 opened and closed by the controller 24. Since the port 56 is formed, when a sufficient negative pressure is formed in the vacuum tank 10, the air is introduced through the inflow port 56 to idle the vacuum pump 40 to load the driving motor 34 for the vacuum pump. Decrease.
일방향 클러치(50)는 확대 도시한 바와 같은 스프래그 형태를 채용하였으며, 일방향 회전만을 가능케 한다. 즉, 펌프 구동축(36)의 회전력이 메인 구동축(38)으로 전달되는 것을 차단하는 반면, 메인 구동축(38)의 회전력은 펌프 구동축(36)으로 전달되어 진공펌프(40)를 구동할 수 있도록 구성하였다.The one-way clutch 50 adopts a sprag form as shown in an enlarged manner, and allows only one-way rotation. That is, while the rotational force of the pump drive shaft 36 is blocked from being transmitted to the main drive shaft 38, the rotational force of the main drive shaft 38 is transmitted to the pump drive shaft 36 is configured to drive the vacuum pump 40 It was.
진공펌프(40)에서 생성된 부압을 진공탱크(10)로 보내는 진공파이프(54)에는 유체의 역방향 흐름을 제지하는 체크밸브(60)를 설치하여, 진공탱크(10)로부터의 역류를 방지하였다.In the vacuum pipe 54 which sends the negative pressure generated by the vacuum pump 40 to the vacuum tank 10, a check valve 60 for restraining the reverse flow of the fluid is provided to prevent backflow from the vacuum tank 10. .
다음에는 이러한 구성을 지닌 전기 자동차용 부압 발생장치의 작동원리에 대하여 설명한다.Next, the operation principle of the negative pressure generator for an electric vehicle having such a configuration will be described.
[차량 정차시 및 저속 주행시][When the vehicle is stopped and at low speeds]
차량의 정차시나, 저속 주행시에 압력 감지센서(62)를 통해 감지한 부압이 규정치 이하인 경우, 제어기(24)는 신호를 보내 진공펌프용 구동모터(34)를 구동시켜 진공펌프(40)를 회전시킴으로써 부압을 얻는다.If the negative pressure sensed by the pressure sensor 62 is lower than the prescribed value when the vehicle is stopped or at a low speed, the controller 24 sends a signal to drive the vacuum pump driving motor 34 to rotate the vacuum pump 40. Negative pressure is obtained.
이때, 일방향 클러치(50)는 가상선으로 도시한 바와 같이 위치하게 되므로, 펌프 구동축(36)의 회전력은 메인 구동축(38)으로 전달되지 않게 된다.At this time, since the one-way clutch 50 is positioned as shown in the imaginary line, the rotational force of the pump drive shaft 36 is not transmitted to the main drive shaft 38.
[차량의 정상 주행시][At normal driving of vehicle]
전기 자동차용 구동모터 회전수와 차속신호를 검출하여 차량이 정상 주행 상태임을 판단하는 경우, 제어기(24)는 제어신호를 보내 진공펌프용 구동모터(34)를 정지시킨다. 이때, 전기 자동차용 구동모터(26)의 회전력은 구동기어(28)와 피동기어(30)에 의해 메인 구동축(38)으로 전달되며, 메인 구동축(38)의 회전력은 실선으로 도시한 바와 같이 위치한 원웨이 클러치(50)의 작용에 의해 펌프 구동축(36)을 회전시켜 진공펌프(40)를 구동시킴으로서, 부압을 생성한다.When it is determined that the vehicle is in a normal driving state by detecting the drive motor speed and the vehicle speed signal for the electric vehicle, the controller 24 sends a control signal to stop the drive motor 34 for the vacuum pump. At this time, the rotational force of the electric motor drive motor 26 is transmitted to the main drive shaft 38 by the drive gear 28 and the driven gear 30, the rotational force of the main drive shaft 38 is located as shown by the solid line The negative pressure is generated by rotating the pump drive shaft 36 by the action of the one-way clutch 50 to drive the vacuum pump 40.
만일, 압력 감지센서(62)로 감지한 진공탱크(10)내의 부압이 규정치 이상인 경우에는 위에서 설명한 대기압 밸브(52)를 작동시켜 진공펌프(40)를 공회전 시키면 된다.If the negative pressure in the vacuum tank 10 detected by the pressure sensor 62 is greater than or equal to a predetermined value, the vacuum pump 40 may be idled by operating the atmospheric pressure valve 52 described above.
이상으로 설명한 본 고안의 전기 자동차용 부압 발생장치는 차량의 정상 주행시 뿐만 아니라, 정차시에도 부압을 제공할 수 있는 효과를 갖는다.The negative pressure generator for an electric vehicle of the present invention described above has the effect of providing negative pressure not only during normal driving of the vehicle, but also when stopped.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950021407U KR0138271Y1 (en) | 1995-08-19 | 1995-08-19 | Negative pressure generator for electric vehicles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950021407U KR0138271Y1 (en) | 1995-08-19 | 1995-08-19 | Negative pressure generator for electric vehicles |
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| Publication Number | Publication Date |
|---|---|
| KR970008813U KR970008813U (en) | 1997-03-27 |
| KR0138271Y1 true KR0138271Y1 (en) | 1999-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019950021407U Expired - Fee Related KR0138271Y1 (en) | 1995-08-19 | 1995-08-19 | Negative pressure generator for electric vehicles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100405792B1 (en) * | 2001-10-12 | 2003-11-14 | 현대자동차주식회사 | Alternator vacuum pump for noise reduction and improvement in durabilty |
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1995
- 1995-08-19 KR KR2019950021407U patent/KR0138271Y1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100405792B1 (en) * | 2001-10-12 | 2003-11-14 | 현대자동차주식회사 | Alternator vacuum pump for noise reduction and improvement in durabilty |
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| KR970008813U (en) | 1997-03-27 |
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