Abstract:
본 발명은 모터 드라이브 유닛이 전자 제어 유닛으로부터 제어 신호를 수신하여 전자 모터를 제어하는 가변 밸브 타이밍 제어 장치에서 전자 제어 유닛과 모터 드라이브 유닛 간의 통신 장애가 발생할 경우 장치의 고장을 회피하는 방법에 관한 것으로서, 모터 드라이브 유닛이 전자 제어 유닛과의 통신 장애를 감지하면 지각(Retard) 설정 프로세스나 진각(Advance) 설정 프로세스와 같은 프로세스를 수행함으로써 장치의 고장 발생을 방지할 수 있도록 한다.
Abstract:
PURPOSE: A purge control solenoid valve having a gas flow change point is provided to minimize the design change on a PCSV and to increase a flow rate through a duty flow rate and differential pressure flow rate performance. CONSTITUTION: A purge control solenoid valve having a gas flow change point comprises a driver module body(6) and an outlet module body(20). The driver module body comprises an armature(12). The armature compresses a spring(11) through a core(10) and opens an inner gas path, when current is supplied through ECU(4) so that evaporative gas is supplied to an engine(E) from a fuel tank. The outlet module body comprises an evaporative gas inflow nipple(21) and an evaporative gas exhaust nipple(22). The evaporative gas inflow nipple is connected to an evaporative gas line(3). The evaporative gas line is connected at a canister(2) connected to a fuel tank(1). The exhaust nipple is expanded toward an intake manifold(M) supplying outer air to the engine. The outlet module body comprises an evaporative gas outlet nozzle(30). The armature is reduced according to a flow path and a cross section which is expanded again has two changed points, when discharging the evaporative gas through the inner gas path. The evaporative gas outlet nozzle changes the flow speed and flow rate of the gas.
Abstract:
A PCSV(Pressure Control Solenoid Valve) armature performance test apparatus is provided to perform accurate and efficient PCSV development by measuring forces applied to the armature under an actual operation state. A PCSV armature performance test apparatus includes a base, a back pressure applier(3), a back pressure supply unit, a force sensor(7), a linear moving unit, a displacement sensor(9), and a data processor(11). The back pressure applier is fixed on the base, having a hole in the center. The back pressure supply unit provides the hole of the back pressure applier with back pressure. The force sensor locates an armature in the front for measuring a force applied to the armature. The linear moving unit moves the armature vertically toward the hole of the back pressure applier. The displacement sensor measures the amount of linear movement of the armature. The data processor processes output data of the force sensor and the displacement sensor.
Abstract:
A device for testing a leakage ability of a PCSV of a vehicle fuel evaporation gas control system is provided to inspect an operational condition of a vehicle by changing high and low temperatures and to test the vehicle by controlling a driving signal of a vacuum pump on the basis of the maximum negative pressure generating condition. A device for testing a leakage ability of a PCSV of a vehicle fuel evaporation gas control system comprises the PCSV(1), an acceleration sensor(2), a thermocouple(3), a vibration control unit(4), a temperature control unit(5), a flowmeter(6), a current signal amplifier(7), an air filter(8), a pressure sensor(10), a PCSV duty controller(11), a vacuum pump(12), an air tank(9), and a data keeping unit(13). The PCSV is connected with the data keeping unit, the PCSV duty controller, and the flowmeter to prevent fuel evaporation gas of a vehicle from being discharged to the air. The acceleration sensor is connected with the data keeping unit to measure a degree of vibration. The thermocouple is connected with the data keeping unit to detect temperature of a surface for the PCSV and internal temperature thereof. The vibration control unit is used to make a vibrating condition of the vehicle. The temperature control unit is formed with the acceleration sensor, the thermocouple, and the PCSV inside and installed to realize changes of temperature for the vehicle. The flowmeter is used to measure a flow when the PCSV is operated and not operated. The current signal amplifier is installed to amplify a signal obtained by the flowmeter. The air filter is used to block a foreign material when inletting air. The pressure sensor is used to measure the degree of negative pressure with the air tank to control pressure thereof. The PCSV duty controller is installed to control frequency, voltage, and a duty ratio of the PCSV. The vacuum pump is used to generate a pressure difference between an input end and an output end. The air tank is installed to keep compressed air generated from the vacuum pump. The data keeping unit is installed to hold and analyze the signal obtained from the sensor and the amplifier.