Patent ID: 9664168
Date: 2017-05-30
CPC Classifications: B60K,F02B,F02N,F03C,F04B,F16H,Y02T

Claim:
1. A hydrostatic power unit arrangement, comprising: a variable displacement machine with a continuously variable displacement volume and operable as a pump and motor; an internal combustion engine connected to the variable displacement machine, wherein when operated as a pump, a suction side of the variable displacement machine sucks hydraulic fluid out of a tank and delivers into a delivery side, wherein when operated as a motor, the variable displacement machine is a hydraulic starter to start the internal combustion engine, and wherein the variable displacement machine operated as a motor is supplied with hydraulic fluid from a hydraulic accumulator on the suction side; a displacement volume control device to set a displacement volume of the variable displacement machine; a positioning piston device supplied with hydraulic fluid from a charging pressure circuit; and a supplemental positioning piston device in operative connection with the displacement volume control device for adjustment of the displacement volume of the variable displacement machine and which is actuated directly by the pressure present in the hydraulic accumulator, wherein the variable displacement machine is adjusted to increase the displacement volume to start the internal combustion engine by a connection of the supplemental positioning piston device with the hydraulic accumulator.