Emergency operating method for an active chassis of a motor vehicle
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorChristoph Lenniger
Life of this patent
Estimating the term…
Abstract
An emergency operating method for operating an active chassis of a motor vehicle in the event of a failure of a pump of the active chassis. The method includes (a) detecting a termination of a proper electrical supply of an electric drive machine of the pump; (b) short-circuiting the electric drive machine operated at high voltage; and (c) disconnecting the high-voltage supply of the electric drive machine.
Claims7
An emergency operating method for an active chassis of a motor vehicle, wherein the active chassis comprises at least the following components:
- (i) a control device for controlling the active chassis;
- (ii) at least one damper device with a hydraulic cylinder and a hydraulic piston pressure-loaded on both sides by a hydraulic fluid;
- (iii) a pump driven by an electric drive machine, which is operated at a voltage, for generating a changeable pressure above the hydraulic piston;
- (iv) a hydraulic pressure accumulator for providing an operating pressure for the at least one damper device;
- and
- (v) for the at least one damper device, respectively at least one control valve for controlling a differential pressure across the hydraulic piston,
- wherein the emergency operating method is performed by the control device and comprises at least the following steps in the order given:
- a. detect a termination of an electrical supply of the electric drive machine of the pump;
- b. short-circuit the electric drive machine;
- and
- c. disconnect the voltage supply of the electric drive machine.
An active chassis for a motor vehicle, said active chassis comprising:
- a control device for controlling the active chassis;
- at least one damper device with a hydraulic cylinder and a hydraulic piston pressure-loaded on both sides by a hydraulic fluid;
- a pump driven by an electric drive machine, which is operated at a voltage, for generating a changeable pressure above the hydraulic piston;
- a hydraulic pressure accumulator for providing an operating pressure for the damper device;
- and
- for the at least one damper device, respectively at least one control valve, which is operated at lower voltage during normal operation, for controlling a differential pressure across the hydraulic piston,
- wherein the control device is configured to:
- a. detect a termination of an electrical supply of the electric drive machine of the pump;
- b. short-circuit the electric drive machine;
- and
- c. disconnect the voltage supply of the electric drive machine.
Dependencies are inferred from the claim text.