Electromagnetic Fuel Injection Valve

摘要

Provided is an electromagnetic fuel injection valve in which in both operations of opening and closing a valve, a movable element is made to free run before a valve element starts to operate, and bounding motion of the movable element occurring at the time of the valve opening operation is reduced, thereby balancing improvement of responsiveness and improvement of stability of operation. There are equipped with: a first movable element 105, which is biased by a first spring 106 biasing in a valve closing direction, as a movable element which opens and closes a valve when being attracted by a magnetic core 109 of the electromagnetic fuel injection valve; and a second movable element 104 biased toward the magnetic core 109 by a second spring 112 biasing in a valve opening direction.

主权项

1. An electromagnetic fuel injection valve comprising:
a valve element which opens and closes a gap between the valve element and a valve seat; a movable element which transmits force to the valve element to cause the valve element to operate; a magnetic core which causes a magnetic flux to flow between the magnetic core and the movable element to generate a magnetic attractive force; and a coil configured to generate a magnetic flux in the magnetic core, wherein an electricity supplied to the coil is controlled to cause the valve element to open and close a fuel passage, wherein the movable element is configured with a first movable element and a second movable element, each of the first movable element and the second movable element has a magnetic attractive surface facing the magnetic core, the first movable element is biased by a first spring in a valve closing direction, and the second movable element is biased in a valve opening direction by a second spring which has a biasing force smaller than a biasing force of the first spring.