Patent ID: 6217299
Filing Date: 2001-04-17
Classification: F01L,F02M,F04B

Abstract:
An integrated pump and tappet unit for an internal combustion engine, comprising:a pump and tappet unit body composed of a one-piece casting,a tappet member fitted in the body to be driven by the engine,a tappet arm connected to the tappet member,a piston member operationally connected to the tappet member through the tappet arm and arranged to pump fuel from a fuel chamber in the body under high pressure to be fed to one or more cylinders of the engine, anda flange member fixed against movement relative to the pump and tappet body and through which the tappet arm extends, so that the piston member and the tappet member are at opposite respective sides of the flange member, and wherein the tappet arm is able to reciprocate relative to the flange member and is in sealing relationship with the flange member so that passage of fuel from the piston member side of the flange member to the tappet member side of the flange member is inhibited.