Assertion: carburetor's throttle | /r/HasProperty | closed
Facets:
value: quickly
type: MANNER
value: partially
type: DEGREE
Source sentences:
text: This circuit works exactly like the idle circuit, and when engaged it simply supplies extra fuel when the throttle is closed.
text: When the throttle is partially closed, a manifold vacuum develops as the intake drops below ambient pressure.
text: Even in those units that are not "drive-by-wire", there will often be a small solenoid driven valve, the Idle Air Control Valve (IACV), that the ECU uses to control the amount of air that can bypass the main throttle opening to allow the engine to idle when the throttle is closed.
text: The throttle is either open or closed (although there is always a small hole or other bypass to allow a small amount of air to flow through so the engine can idle when the throttle is closed), or some intermediate position.
text: When the throttle is closed quickly there is a rapid reduction in manifold pressure and a net reduction in the amount of fuel wetting the walls of the throat and inlet manifold.
text: The extra-rich mixture isn’t a problem when the throttle is being closed because the driver is calling for a reduction in engine speed or power.
text: In a fuel injection setup, the idle bypass keeps airflow up when the throttle is closed.
text: When the throttle is closed, a vacuum signal pulls both air and fuel through various passages, through the idle mixture adjustment screw.