Hydraulic hybrid safety system
AssigneeFEV GmbH
InventorsKiumars Jalali, Martin Pischinger
Life of this patent
Estimating the term…
Abstract
A hydraulic hybrid safety system is provided. The hydraulic hybrid safety system is part of a hydraulic hybrid system that has an over-center bent-axis rotary pump/motor with a yoke, the yoke having a zero yoke angle and a plurality of non-zero yoke angles. The safety system includes a spring that is operable to move the yoke to the zero yoke angle when the hydraulic hybrid system loses electrical power.
Claims16
A hydraulic hybrid safety system comprising:
- a hydraulic hybrid system having:
- an over-center bent-axis rotary pump/motor having a yoke, said yoke having a zero yoke angle and a plurality of non-zero yoke angles, said pump/motor having zero torque when said yoke angle is at said zero yoke angle and non-zero torque when said yoke is at a non-zero yoke angle;
- a high pressure accumulator in fluid communication with said pump/motor;
- a low pressure accumulator in fluid communication with said pump/motor;
- and
- a spring, said spring operable to move said yoke to said zero yoke angle when said hydraulic hybrid system loses electrical power.
The hydraulic hybrid safety system 5, wherein said spring is a pair of springs and said pair of control cylinders each have one of said pair of springs, said pair of springs in combination with said pair of control cylinders operable to move said yoke to said zero yoke angle when said hydraulic hybrid system loses power.
A motor vehicle hydraulic hybrid system comprising:
- a high pressure accumulator;
- a low pressure accumulator;
- and
- an over-center bent-axis rotary pump/motor operable as motor and a pump, said pump/motor:
- in fluid in communication with said high pressure accumulator and said low pressure accumulator;
- having a yoke, said yoke moveable between a zero yoke angle and a plurality of non-zero yoke angles during operation of said pump/motor;
- having zero torque when said yoke angle is at said zero yoke angle and non-zero torque when said yoke is at a non-zero yoke angle;
- and
- in mechanical communication with an internal combustion and a transmission of said motor vehicle;
- a safety system having a spring attached to said yoke of said pump/motor, said spring operable to move said yoke to said zero yoke angle when said hydraulic hybrid system loses power.
Dependencies are inferred from the claim text.