High pressure fuel pump for internal combustion engine
摘要
<p>The invention provides a high pressure fuel pump which comprises: a reciprocating plunger (2); a pump body (1) in which a pressurization chamber (12) is formed; and a cylinder (20) which is fixed to the pump body (1) for slidably holding the plunger (2), and which is adapted to suck fuel into the pressurization chamber (12) through a suction valve (5) and to pressurize the sucked fuel to discharge the pressurized fuel from a discharge valve (6) in response to operation of the plunger (2). An annular groove is formed between sliding surfaces of the cylinder (20) and the plunger (2), and the plunger (2) is configured so that the plunger (2) is projected beyond an end portion of the cylinder (20) facing the pressurization chamber (12).</p>
