Suspension system for motor vehicles
AssigneeMannesmann Sachs AG
InventorHubert Beck
Life of this patent
Estimating the term…
Abstract
A suspension system for motor vehicles includes level regulation for adjusting a predetermined height of the vehicle body. At least one piston-cylinder unit of the suspension system includes a work cylinder, a piston rod and a damping piston having damping valves. A pump is arranged between an oil reservoir and the piston-cylinder unit via corresponding inlet and outlet lines. The pump comprises a pump piston and a drive unit arranged so that a pressure of the piston-cylinder unit acts on a delivery side and on a driving side of the pump piston.
Claims18
A suspension system for a motor vehicle with level regulation for adjusting a predetermined height of a vehicle body, comprising:
- at least one piston-cylinder unit provided with a work cylinder, a piston rod axially movably arranged in said work cylinder, and a damping piston connected to said piston rod;
- an oil reservoir;
- and
- a pump connected between said oil reservoir and said piston-cylinder unit via corresponding inlet and outlet lines, wherein said pump comprises a pump piston and a drive unit operatively arranged for effecting a reciprocating axial movement of said pump piston, said drive unit being electrically controlled, wherein said pump piston has a drive side connected to said drive unit and a delivery side connected to said inlet and outlet lines, and wherein said pump piston is arranged so that the pressure of said piston-cylinder unit acts on said delivery side and on said driving side of said pump piston.
A suspension system for a motor vehicle with level regulation for adjusting a predetermined height of a vehicle body, comprising:
- at least one piston-cylinder unit provided with a work cylinder, a piston rod axially movably arranged in said work cylinder, and a damping piston connected to said piston rod;
- an oil reservoir;
- and
- a pump connected between said oil reservoir and said piston-cylinder unit via corresponding inlet and outlet lines, wherein said pump comprises a pump piston and a drive unit operatively arranged for effecting a reciprocating axial movement of said pump piston, wherein said pump piston has a drive side connected to said drive unit and a delivery side connected to said inlet and outlet lines, and wherein said pump piston is arranged so that the pressure of said piston-cylinder unit acts on said delivery side and on said driving side of said pump piston, wherein said drive unit comprises a shaft carrying a cam and a pressure bearing for supporting said shaft.
A suspension system for a motor vehicle with level regulation for adjusting a predetermined height of a vehicle body, comprising:
- at least one piston-cylinder unit provided with a work cylinder, a piston rod axially movably arranged in said work cylinder, and a damping piston connected to said piston rod;
- an oil reservoir;
- and
- a pump connected between said oil reservoir and said piston-cylinder unit via corresponding inlet and outlet lines, wherein said pump comprises a pump piston and a drive unit operatively arranged for effecting a reciprocating axial movement of said pump piston, wherein said pump piston has a drive side connected to said drive unit and a delivery side connected to said inlet and outlet lines, and wherein said pump piston is arranged so that the pressure of said piston-cylinder unit acts on said delivery side and on said driving side of said pump piston, wherein said pump is sealed relative to said piston-cylinder unit and relative to an atmosphere external to said piston-cylinder unit.
A suspension system for a motor vehicle with level regulation for adjusting a predetermined height of a vehicle body, comprising:
- at least one piston-cylinder unit provided with a work cylinder, a piston rod axially movably arranged in said work cylinder, and a damping piston connected to said piston rod;
- an oil reservoir;
- and
- a pump connected between said oil reservoir and said piston-cylinder unit via corresponding inlet and outlet lines, wherein said pump comprises a pump piston and a drive unit operatively arranged for effecting a reciprocating axial movement of said pump piston, wherein said pump piston has a drive side connected to said drive unit and a delivery side connected to said inlet and outlet lines, and wherein said pump piston is arranged so that the pressure of said piston-cylinder unit acts on said delivery side and on said driving side of said pump piston, wherein said drive unit comprises a shaft carrying a cam, said shaft having shaft sides on opposing sides of said cam and wherein both of said shaft sides are sealed toward the atmosphere.
A suspension system for a motor vehicle with level regulation for adjusting a predetermined height of a vehicle body, comprising:
- at least one piston-cylinder unit provided with a work cylinder, a piston rod axially movably arranged in said work cylinder, and a damping piston connected to said piston rod;
- an oil reservoir;
- a pump connected between said oil reservoir and said piston-cylinder unit via corresponding inlet and outlet lines, wherein said pump comprises a pump piston and a drive unit operatively arranged for effecting a reciprocating axial movement of said pump piston, wherein said pump piston has a drive side connected to said drive unit and a delivery side connected to said inlet and outlet lines, and wherein said pump piston is arranged so that the pressure of said piston-cylinder unit acts on said delivery side and on said driving side of said pump piston;
- and
- a flow connection extending from a drive side of the pump piston to said oil reservoir.
A suspension system for a motor vehicle with level regulation for adjusting a predetermined height of a vehicle body, comprising:
- at least one piston-cylinder unit provided with a work cylinder, a piston rod axially movably arranged in said work cylinder, and a damping piston connected to said piston rod;
- an oil reservoir;
- and
- a pump connected between said oil reservoir and said piston-cylinder unit via corresponding inlet and outlet lines, wherein said pump comprises a pump piston and a drive unit operatively arranged for effecting a reciprocating axial movement of said pump piston, wherein said pump piston has a drive side connected to said drive unit and a delivery side connected to said inlet and outlet lines, and wherein said pump piston is arranged so that the pressure of said piston-cylinder unit acts on said delivery side and on said driving side of said pump piston, wherein said drive unit comprises a cam connected to a shaft and a sliding ring surrounding said cam, said sliding ring contacting an end face of said piston pump.
Dependencies are inferred from the claim text.