Fuel injector with improved guided stroke movement of the valve closing part

摘要

An automotive fuel injection valve (1) has a valve-control plate (11) in close proximity to a throttle plate, incorporating a valve closure (13) with a collar (14) regulates the operation of a jet needle (12) as it shifts along an axis (15). A spring (16) is located between the collar (14) and throttle plate. The spring is concentric around the valve closure (13) and acts to close the valve. The spring has a number of circumferentional elastic sections that locate between the collar (14) and throttle plate (10). The elastic sections undergo lateral shift when the spring is under pressure (16).