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A throttle kicker is a component typically found in older vehicles equipped with carburetors, designed to increase the engine’s idle speed under certain conditions. Here’s how it works:
- Vacuum Diaphragm: The throttle kicker includes a vacuum diaphragm, which is connected to the engine’s intake manifold. Changes in engine vacuum, such as those that occur when certain accessories are engaged or when the engine is under load, actuate the diaphragm.
- Throttle Linkage: Connected to the vacuum diaphragm is a rod or lever mechanism that applies force to the throttle linkage. When the vacuum diaphragm receives a signal, it moves the rod or lever to adjust the throttle linkage position.
- Idle Speed Adjustment: By pushing against the throttle linkage, the throttle kicker increases the engine’s idle speed. This adjustment compensates for drops in engine speed that may occur when accessories like air conditioning compressors or power steering pumps are engaged, or when the engine is under load, such as during sudden acceleration.
- Solenoid Valve: The vacuum supply to the throttle kicker is controlled by a solenoid valve. The solenoid valve regulates the flow of vacuum to the diaphragm, allowing the throttle kicker to operate only when necessary.
- Function: The throttle kicker helps prevent stalling and rough idling by increasing the engine’s idle speed when additional load is placed on the engine. It ensures smooth operation and responsiveness, especially during transitions between different driving conditions.
Overall, the throttle kicker plays a role in engine performance by adjusting the idle speed in response to changes in engine load or accessory engagement, helping to maintain smooth operation and prevent stalling.
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