Vehicle Electrical Actuators

some types of Actuators

Vehicle Common Actuators

• Fuel Pump

  Fuel Pump is powerd from the Vehicle battry and connected to the engine ECU , to give the engine the fuel at the right pressure suitable for its work

• Injectors

  Injector is an injection nozzle with solenoid that is controlled by ECM. Using intake air quantity and engine rpm, ECM calculates basic fuel injection time, and calculates corrective fuel injection period time on the basis of engine coolant temp, feed back signal from oxygen sensor during close-loop-control,

• Fuel pressure Regulator

  Injection rate through injector depends on injection pressure, injection time and orifice size. Therefore in order to control fuel injection rate by means of current connecting time for an injector with spray hole size fixed, injection pressure shall remain constant for any varied pressure at intake manifold.

• Idle Speed Actuator

  ISA (Idle Speed Actuator) is installed at throttle body of engine and control air intake rate into engine depending on ECU signal in order to control idle rp Idling speed is controlled relying on a number of parameters including actual engine rpm, coolant temperature, air-conditioning system and headlamp operation status, etc.

• Spark Plugs

  Spark plugs transmit electrical energy that turns fuel into working energy. A sufficient amount of voltage must be supplied by the ignition system to cause it to spark across the gap of the spark plug. This is called Electrical Performance.

• Ignition Coils

  The Ignition coil functions as an energy-storage device and transformer. It is supplied with DC voltage from the alternator, and provides the high tension ignition pulses for the spark plugs. The MFI engine adopts a computerized ignition system. The ECM calculates ignition timing, timing advance, and knocking control by the sensor signals.

• Exhaust Gaz recirculation

  Exhaust gas contains NOx that is hazardous to human central nervous system and mucous membrane, as well as is globally principal cause for photochemical smog, and therefore globally subject to increasingly strong regulation together with HC and CO. As CO and HC are resulting from imperfect combustion, improved combustion will improve engine performance, too.

• Purge Soleniod Valve Control

  A vehicle generates evaporated gas at fuel system such as fuel tank, and HC is the main substance of the gas. Fuel tank requires venting system to avoid pressure rising in the tank when raised temperature generates volume expansion, and there after resulting vacuum pressure. In addition, vapor gas control system is required to prevent fuel vapor from being discharged into atmosphere.

• Variable Intake Control

  Variable intake system varies length of intake manifold in order to improve engine output over all engine operation range, and in particular increase engine output by approx. 10% at low-medium speed range. For frequent crowded downtown driving, engine shall provide high power at low-medium speed range. Highway driving and high speed running requires engine with high power at high speed range.

• Cooling Fan Control

  In order to maximize cooling efficiency and minimize cooling fan motor drive current, radiator fan and condenser fan speeds are controlled using three speed modes such as low, medium, and high speed, on the basis of coolant temperature, car speed, air conditioning switch signal, and conditioning compressor operation signal.

• Generator Current Control

  When turning on headlamp or heating wire in idling, engine rpm will instantly fall down and then recovered due to increased generator load. At that time increasing electrical load will generate rapid engine rpm change, resulting to vibration and poor comfortableness. Generator current control system depends on engine ECU

• A/C compressor control

  A/C Compressor Control Outline A/C Compressor Control is used when accelerating or engine load is instantly increased greatly, in order to improve engine acceleration by temporarily turning off A/C compressor.

• Control Relay Control

  Control relay consists of main relay that provides supply power to engine ECU and various actuators and fuel pump relay that drives fuel pump. Main relay control will operate as soon as ignition switch turns on.