Patent ID: 7464882

Claim:
A fluid injection valve comprising: a valve body that has: a first plurality of fluid passages formed therethrough approximately in a longitudinal direction of the valve body, first and second end faces respectively at each end of the valve body in the longitudinal direction, each end face including respective end openings of the first plurality of fluid passages, and a depressed portion formed on the first end face of the valve body, said first depressed portion being spaced from an outer circumference of the first end face to define an outer circumferential portion and being spaced from the openings of the first plurality of fluid passages to define a sealing surface functioning as a peripheral portion encircling the openings of the first plurality of fluid passages; and a plate member that has: a second plurality of fluid passages formed therethrough approximately in a longitudinal direction of the plate member, first and second end faces respectively at each end of the plate member in the longitudinal direction, each end face including respective end openings of the second plurality of fluid passages, and a depressed portion formed on the second end face of the plate member, said depressed portion being spaced from an outer circumference of the second end face to define an outer circumferential portion and being spaced from the openings of the second plurality of fluid passages to define a sealing surface functioning as a peripheral portion encircling the openings of the second plurality of fluid passages; the plate member being fastened to the valve body in the longitudinal direction to bring the second end face of the plate member into an intimate contact with the first end face of the valve body, the second plurality of fluid passages being communicated with the first plurality of fluid passages, and a first cavity defined by the facing depressed portions of the first end face of the valve body and the second end face of the plate member, wherein the communicating first and second pluralities of fluid passages are substantially surrounded by the first cavity.