Patent Number: 6,332,761

Title: Radial piston pump for high pressure fuel delivery

Abstract: The invention relates to a radial piston pump for high-pressure fueldelivery in fuel injection systems of internal combustion engines in acommon rail injection system having a drive shaft that is supported in apump housing. The drive shaft is eccentrically embodied or has a number ofcam-like projections in the circumference direction, and a number ofpistons are arranged radially in relation to the drive shaft. Each pistonreciprocates a respective cylinder chamber and is moved in a reciprocatingfashion in the cylinder chamber when the drive shaft rotates. Aspring-preloaded check valve is assembled on the intake side and on thehigh pressure side, and a component that includes a through openingconstitutes the respective cylinder chamber. A high-pressure deliveryopening leads away from the cylinder chamber and in the sealing seat ofthe high pressure side check valve, opens out into a mounting opening ofthe component. The mounting opening contains the valve components. Inorder to achieve a simplified assembly in a vicinity of the high pressureside check valve, with the exception of a valve body which is placedagainst the sealing seat, the high pressure side check valve is insertedinto the mounting opening as a preassembled unit and is tightened againstthe component to form a high-pressure seal.

Inventors: Guentert; Josef (Gerlingen, DE), Frey; Hansjoerg (Stuttgart, DE)


International Classification: F02M 59/46 (20060101); F02M 59/00 (20060101); F04B 53/10 (20060101); F04B 1/04 (20060101); F04B 1/00 (20060101); F04B 007/04 ()

Expiration Date: 12/25/2014