Patent ID: 7707996
Filing Date: 2010-05-04
Classification: F02M,F04B

Abstract:
1. A high pressure fuel supply pump for supplying fuel to an internal combustion engine, comprising: a pressurizing chamber for connecting to a low pressure fuel passage via an intake valve and for connecting to a high pressure fuel passage via a discharge valve; a pressurizing member for pressurizing fuel in said pressurizing chamber and sending out the pressurized fuel to said high pressure fuel passage; a cylinder for providing a hole sliding portion in which said pressurizing member is moved slidably; a pump body for forming said pressurizing chamber combined with said cylinder; a fuel storing portion for providing at the side away from said pressurizing chamber of the sliding portion between said pressurizing member and said cylinder, and receiving fuel leaked from the sliding portion between said pressurizing member and said cylinder; and a seal member for forming said fuel storing portion by slidably contacting the outer perimeter of said pressurizing member; wherein a press-fitting portion formed between said cylinder and said pump body connects to said fuel storing portion via a longitudinal passage or an annular passage which is formed between said cylinder and said pump body.