Tappet, high pressure pump comprising at least one tappet, engine comprising at least one tappet, engine comprising a high pressure pump having at least one

摘要

Disclosed is a roller tappet 10 for a fuel pump of an internal combustion engine. The roller tappet comprises a body having a roller reception space 32 that is formed at one end of the body and that is adapted to receive a roller 18. The body further comprises a lubricant supply groove 20 for the reception of lubricant and a tappet alignment groove 28. A first fluid communicating connection 24 is present between the lubricant supply groove 20 and the roller reception space 32 for the supply of lubricant to an outlet 31 that opens into the roller reception space. A second fluid communicating connection 26 is present in the roller tappet that is provided to guide some of the lubricant supplied to the lubricant supply groove 20 to a second point of application, possibly via tappet alignment groove 28, with the second point of application being remote from the outlet 31. The roller tappet provides more lubrication to the roller which is frequently located at the top of an engine and therefore receives less lubricant than other engine parts since gravity forces the lubricant away from the upper engine parts and causes it to pool lower down. The extra lubricant on the roller reduces friction and so reduces wear on the engine parts.