- EGR vacuum
- A vacuum source above the closed throttle plate; used for control of ported EGR valves. Vacuum is zero at closed throttle
Dictionary of automotive terms. 2015.
EGR vacuum
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EGR valve — [1] A part of an EGR system mounted on or near the inlet manifold and controlled by inlet manifold vacuum, which is usually closed at idle and low speeds, but opens during acceleration, admitting exhaust gas to the inlet manifold. Most EGR valves … Dictionary of automotive terms
vacuum modulated EGR — An exhaust gas recirculation in which the amount of exhaust gas admitted to the intake manifold depends on a vacuum signal controlled by throttle position. When the throttle is closed, at idle or during deceleration, there is no vacuum signal to… … Dictionary of automotive terms
EGR venturi vacuum amplifier — A device that uses a relatively weak venturi vacuum to control a manifold vacuum signal to operate the EGR valve. Contains a check valve and relief valve that open whenever the venturi vacuum signal is equal to or greater than manifold vacuum … Dictionary of automotive terms
EGR — Acronym for Exhaust gas recirculation. Also see negative transducer EGR valve vacuum modulated EGR … Dictionary of automotive terms
EGR control solenoid — (EGRC) energizes to allow manifold vacuum to the EGR gas temperature … Dictionary of automotive terms
EGR vent solenoid — (EGRV) electrical solenoid that normally vents EGRC vacuum line. When EGRV is energized, EGRC can open the EGR valve … Dictionary of automotive terms
vacuum solenoid — On some engines, a vacuum solenoid controlled by an electrical sensor switch is used to control the EGR valve … Dictionary of automotive terms
ported EGR valve — Operated by a vacuum signal from the carburetor EGR port. The port signal actuates the valve diaphragm. As vacuum increases, spring pressure is overcome, opening the valve and allowing EGR flow. The amount of the flow is dependent on the position … Dictionary of automotive terms
electronic EGR valve — The EGR valve used in engine management system in which the EGR flow is controlled by the computer (usually by means of an EGR valve position sensor attached to the EGR valve). Operating vacuum is supplied by EGR solenoid valve(s) … Dictionary of automotive terms
venturi vacuum amplifier — (VVA) used with some EGR system so that carburetor venturi vacuum can control EGR valve operation; venturi vacuum is desirable because it is proportional to the airflow through the carburetor … Dictionary of automotive terms
