Vacuum driven hydraulic balance system

A motor vehicle vacuum driven hydraulic balance system, comprising:

• a housing;
• a shaft rotatably supported in the housing, the shaft having a longitudinal bore acting to deliver an oil flow to a plurality of ports created in the shaft;
• a vacuum flow passage communicating with both the longitudinal bore and an oil sump;
• a first delivery passage created in a portion of the housing, the first delivery passage in direct communication with the longitudinal bore;
• and
• an electrical oil pump acting to pump oil from the oil sump to the longitudinal bore through the first delivery passage;
• wherein axial rotation of the shaft creates a partial vacuum in the longitudinal bore acting to vacuum drag oil from the oil sump through the vacuum flow passage to the longitudinal bore in addition to a volume of the oil delivered to the longitudinal bore by the electrical oil pump.

A motor vehicle vacuum driven hydraulic balance system, comprising:

• a housing;
• a shaft rotatably supported in the housing, the shaft having a longitudinal bore acting to deliver an oil flow to a plurality of ports created in the shaft;
• a vacuum flow passage communicating with both the longitudinal bore and an oil sump;
• a first delivery passage created in a portion of the housing, the first delivery passage in direct communication with the longitudinal bore;
• an electrical oil pump acting to pump oil from the oil sump to the longitudinal bore through the first delivery passage;
• a second delivery passage created in the portion of the housing, the second delivery passage in communication with the vacuum flow passage between the vacuum flow passage and the oil sump;
• and
• a sleeve having a first sleeve portion fixed in the second delivery passage and a second sleeve portion extending outward from the second delivery passage into the longitudinal bore at a shaft end of the shaft;
• wherein axial rotation of the shaft creates a partial vacuum in the longitudinal bore acting to vacuum drag oil from the oil sump through the vacuum flow passage to the longitudinal bore in addition to a volume of the oil delivered to the longitudinal bore by the electrical oil pump.