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AssigneePremo-Drive Research and Development Pty Ltd.
InventorsChristopher Marshall, Bradley Cooke, Michael Kearsey
Estimating the term…
A hydraulic regenerative drive system for a vehicle is disclosed. An electronic controller (28) receives a nominal engine throttle signal (35) and generates a time-variant torque signal (26) therefrom. A hydraulic control circuit (18) receives controlling signals (15) from the electronic controller (14). A reservoir (62) is in fluid communication with the hydraulic control circuit (18) for storing hydraulic fluid. A pump/motor unit (60) has a controlled element (61) providing variable displacement, and is in fluid communication with the hydraulic control circuit (18). The pump/motor unit (60) is adapted for connection to the drive train (12) of the vehicle. An accumulator (64) is in fluid communication with the hydraulic control circuit (18). The controller (28,14) controls a controlled-torque retard mode of operation, in which the controlled element (61) of the pump motor unit (60) is controlled by the torque signal (26) to impart a dynamically calculated retarding torque to the drive train (12), and the pump/motor unit (60) pumps fluid from said reservoir to the accumulator (64) via the hydraulic control circuit (18). The controller (28,14) also controls a controlled-torque propulsion mode of operation in which the controlled element (61) is controlled by the torque signal (26) to impart a dynamically calculated propelling torque to the drive train (12), and the pump/motor unit (60) motors under influence of fluid from the accumulator (64) passing to the reservoir (62) via the hydraulic control circuit (18).
A hydraulic regenerative drive system for a vehicle comprising:
An electronic controller for a hydraulic regenerative drive system, said controller receiving a nominal engine throttle signal, generating a time-variant torque signal therefrom, and wherein said controller controls (i) a controlled-torque retard mode of operation of said drive system, in which a controlled element of a pump/motor unit is controlled by said torque signal to impart a dynamically calculated retarding torque to a vehicle drive shaft;
A method for controlling operation of a hydraulic regenerative drive system comprising the steps of:
A computer program product comprising a computer program stored on a storage medium, said program including code means for performing the steps of:
A hydraulic regenerative drive system for a vehicle including an electronic controller receiving a nominal engine throttle signal and generating a time-variant torque signal therefrom, and wherein said controller controls (i) a controlled-torque retard mode of operation, in which a dynamically calculated retarding torque is imparted to the drive train of said vehicle, and (ii) a controlled-torque propulsion mode of operation, in which a dynamically calculated propelling torque is imparted to said drive train.
Dependencies are inferred from the claim text.