Fuel injection valve and fuel injection system
AssigneeDenso Corporation
InventorKeita Imai
Life of this patent
Estimating the term…
Abstract
An injection hole body has injection holes to inject fuel. A valve body forms a fuel passage with an inner surface of the injection hole body to communicate with inflow ports of the injection holes. The valve body opens and closes the fuel passage by being seated on and unseated from a seating surface of the injection hole body. An inflow port gap distance is a gap between the valve body and the inflow ports along a center axis of the valve body. An inter-injection hole distance is a distance between inflow ports, which are adjacent to each other, among the inflow ports placed around the center axis. The inter-injection hole distance is smaller than the inflow port gap distance in a state where the valve body is unseated from the seating surface and is at a farthest position in its movable range.
Claims27
A fuel injection valve comprising:
- an injection hole body having a plurality of injection holes to inject fuel for causing combustion in an internal combustion engine;
- and
- a valve body configured to form a fuel passage between the valve body and an inner surface of the injection hole body to communicate with inflow ports of the injection holes, the valve body configured to open and close the fuel passage by being seated on and unseated from a seating surface of the injection hole body, wherein
- an inflow port gap distance is a size of a gap between the valve body and the inflow ports in a direction of a center axis of the valve body,
- an inter-injection hole distance is a distance between inflow ports, which are adjacent to each other in the circumferential direction, among the inflow ports placed in the circumferential direction around the center axis,
- the inter-injection hole distance is smaller than the inflow port gap distance in a state where the valve body is unseated from the seating surface and is at a farthest position in a movable range of the valve body,
- the inflow port gap distance is smaller than a diameter of a seat surface of the valve body,
- the seat surface seals fuel from being injected from the fuel injection valve in a state where the valve body is seated on the seating surface,
- all of the inter-injection hole distances are equal to each other for three or more of the injection holes placed concentrically around the center axis, and
- the inter-injection hole distance is smaller than the diameter of the inflow port.
Dependencies are inferred from the claim text.