Patent ID: 9169813
Filing Date: 2015-10-27
Classification: F02M

Abstract:
1. A fuel injection valve comprising: a valve body movably accommodated in a nozzle body for opening or closing an injection port; a pressure control chamber for applying fuel pressure to the valve body in a valve-body closing direction; a fixed plate having a high pressure passage for supplying high pressure fuel to the pressure control chamber so as to move the valve body in the valve-body closing direction, the fixed plate having a low pressure passage for discharging fuel out of the pressure control chamber so as to move the valve body in a valve-body opening direction, and the fixed plate having a lower end surface at which a high pressure port connected to the high pressure passage and a low pressure port connected to the low pressure passage are formed; and a movable plate movably accommodated in the pressure control chamber, the movable plate being brought into contact with the lower end surface of the fixed plate when the fuel is discharged from the pressure control chamber so as to close the high pressure port, and the movable plate being separated from the lower end surface of the fixed plate when the high pressure fuel is supplied to the pressure control chamber so as to open the high pressure port, wherein the lower end surface has a first contacting surface for separating the high pressure port from the low pressure port in a plate-contacted condition in which the movable plate is in contact with the fixed plate, wherein the movable plate has a first sealing surface for sealing a space between the first contacting surface and the first sealing surface in the plate-contacted condition, and wherein a first groove is formed at the first contacting surface and/or the first sealing surface for holding a part of fuel when the movable plate is brought into contact with the fixed plate.