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...
PURPOSE: To minimize the influence of a delay of air by a method wherein a pass 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...
An internal combustion engine includes an air induction passage having an idle air control valve positionable by a stepping motor in response to valve opening and valve closing pulses. Counter means are normally effective to arithmetically count said pulses and retain said count as an indication of...
The present invention relates to an idle speed control device for an internal combustion engine which controls an idle speed control valve (iscv) in response to a load state of an electric appliance, and immediately reduces the idle speed after the start of a vehicle is predicted . A determin...
On Apollo 15, the crew struggled to contain a water leak that threatened to become serious. After fifteen minutes, engineers on the ground were able to trace the problem to a pre-launch incident with a chlorination valve and relay up a procedure that solved the problem. ...
Control valve for a brake booster Brake actuation assembly Disc brake with camming member and torsion spring for vibration control Fluid pressurizing device Description BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to the field of warm-up air delivery control for an...
Because throttle plate 62′ is electronically controlled, an idle bypass valve (element 96 of FIG. 1A) is not provided. Referring now to FIG. 2 a block diagram is shown of the idle control system implemented by the controller executing computer code stored in ROM 106 of controller 12. The...
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 ...
1. An idle speed control apparatus for an internal combustion engine which includes an intake manifold for supplying intake air to the engine and a throttle valve disposed in the intake manifold for adjusting the amount of intake air sucked into the engine, said idle speed control apparatus compr...
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...