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...
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...
Referring to FIG. 3, the minor loop starts with a decision point 35 at which it is determined whether a motor reset is required or in progress. The motor reset is necessary due to the fact that this embodiment includes no position sensor for the idle air control valve but keeps track of...
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)...
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...
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 ...
An idling speed control system for automotive vehicle engines is disclosed. A throttle valve bypass passage for intake air is provided with an air control valve of the on-off type. The air control val
a throttle valve provided in an intake pipe for controlling an amount of intake air, an idle switch for detecting a full closure of the throttle valve 4, i.e., an idling condition, a control device including a CPU 7 and a water temperature sensor interface 9 and an actuator provided in...
Operation of IC engine with fuel metering - involves valve system forming simultaneously part of electric idle run controlThe motor vehicle with the electronic operational device has a memory for a characteristic curve of its output-speed diagram, connecting the points of max. permitted fuel ...
the controlling switch is either connected to the solenoid operated fuel control valve on the fuel pump or the solenoid engine cutoff on the injector control rack. In the case of a gasoline engine, the key operated switch is interposed in the ignition system. The controlling switch may or may...