Exhaust Emissions System - Deceleration Control System: Description

System is designed to reduce hydrocarbon (HC) emissions which could build up during vehicle deceleration. The system maintain the throttle blades open during deceleration so that enough air is present to maintain proper air/fuel ratio. System may consist of an anti-afterburn valve, a throttle opener system, a throttle positioner system, a coasting richer system, an air by-pass valve, a dashpot, a 3-way solenoid valve, and an engine speed switch.