Mazda 1983 RX7 Spezifikationen PDF herunterladen (Seite 133)

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CHOKE - ELECTRIC ASSIST

Article Text

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 04:58PM

ARTICLE BEGINNING

1983 Exhaust Emission Systems

MAZDA RX7 CHOKE RETURN & HOT START ASSIST SYSTEMS

DESCRIPTION

The Choke Return system prevents the choke knob from being

left unreturned to prevent overheating of the exhaust system. The Hot

Start Assist system opens the throttle valve partially during

cranking of warm engine to optimize air/fuel mixture to improve

starting.

The choke return system components include No. 1 water

temperature switch, choke relay, choke magnet and choke switch. The

hot start assist system components include No. 1 water temperature

switch, hot start relay and hot start motor.

OPERATION

CHOKE RETURN SYSTEM

When cold engine is started with assist of choke knob, the

knob is held in pulled position by the choke magnet. Full release of

choke knob is achieved as engine coolant temperature reaches 158

(70

C). The No. 1 water temperature switch stops the flow of

electrical current to magnet and the choke knob is released.

HOT START ASSIST SYSTEM

During cranking of a warm engine, the No. 1 water

temperature switch provides power to the hot start relay when starter

is engaged. When hot start relay is activated, the hot start motor

pulls the hot start cable which opens the throttle valve.

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