Note: Beginning in 1985, Ford multi-port EFI uses an Idle Air Control (IAC) valve, which allows air to bypass the throttle plates. Unlike the stepper motors used by GM and Chrysler, the Ford units only have two terminals and one winding. These units regulate IAC plunger position using pul...
So, the ECU senses the lowering of the engine speed and actuates the idle air valve to allow more air into the engine manifold, bringing RPM to its base level. This valve will work the most on cold starts. Once the engine is warm it hardly opens at all. Many cases of cold start is...
idle air control valve position. Second means are effective to reset the counter to a predetermined reference count such as zero. Third means are effective, upon reset of the counter, to generate a predetermined number of valve opening pulses to return the idle air control valve to a desired ...
control valve is closed, the air flow rate is minimized and when the throttle control valve is opened, the flow rate through the induction system can be somewhat controlled. The use of a bypass passage allows air to bypass the throttle control valve for supply to the engine even when the ...
Introduction Idle Stepper Motor is mainly used to control the throttle valve body of various automobiles, and has the advantages of good stability, high precision, and long life.The idle speed motor is an elemen...
air quantity of an idle control valve is caculated as a total sum of an air mass accumulated in a chamber by an intake air system model and an air mass sucked in a cylinder, and based on a calculation value of a pass air qnantity, the opening of an idle control valve is controlled...
idle air delivery system embodies a servo mechanism which may actuate a device controlling the position of the throttle in the primary air delivery system (solid line) as discussed relative to U.S. Pat. No. 2,420,917 or may control a valve in a throttle bypass air passage (dashed line)...
Common cabin air assembly water separator liquid check valve 21 charcoal filters stationwide HEPA filters in Node 3 Blower in carbon dioxide removal assembly (twice, first replacement failed) Sample Distribution Assembly in Node 3 Mass Spectrometer assembly ...
An engine control valve is disclosed which comprises a first bypass passage for introducing auxiliary air flow to an engine from an upstream side of an intake throttle valve disposed in an air intake
A vehicle is driven by an internal combustion engine having an air induction passage with an idle air control valve positionable by a stepping motor in response to valve opening and valve closing puls