Bypass - pressure limitation for external gear - as a rule, the oil pumps.

摘要

As a rule, the oil pump with an adjustable delivery volume, in particular an external gear - as a rule, the oil pump for the lubricant oil supply of combustion engines, with an intake conduit (20) for the supply line and under pressure with a standing pressure channel (22) for the derivation of conveying oil, with at least two the mating displacement gear wheels (4, 5), with a delivery gear (5) on a barrel bolt (6), which are axially adjustable displacement unit (10) to the delivery pressure controlled adjustment of the axial tooth engagement of the delivery gears (4, 5), with a pressure piston (7) of the displacement unit (10), one of the arc contour (23) as well as a switchable bypass connection for conveying oil, characterized in that the bypass connection than at least one of the pressure piston (7) passing through the bypass bore hole (15) is formed, which in the case of an adjustment position of the displacement unit (10) for minimum delivery quantity of the pressure channel (22) with the intake duct (20) connects.