Hydro-electric hybrid drive system for motor vehicle
First Claim
1. A hybrid electro-hydraulic drive system for a motor vehicle having at least one pair of drive wheels, said drive system comprising:
- a hydraulic transmission including a first hydraulic machine and at least one second hydraulic machine drivingly mechanically connected to at least one of said drive wheels of said motor vehicle for driving thereof;
said first hydraulic machine hydraulically connected to said at least one second hydraulic machine for selectively supplying hydraulic fluid under pressure to said at least one second hydraulic machine so as to hydraulically drive said at least one second hydraulic machine;
said at least one second hydraulic machine being a reversible hydraulic pump/motor unit capable to function both as a hydraulic pump and a hydraulic motor;
an electric motor/generator operatively mechanically connected to said first hydraulic machine; and
at least one energy storage device operable to store and release one of a hydraulic fluid energy and an electrical energy;
said at least one energy storage device operatively connected to one of said hydraulic transmission and said electric motor/generator.
1 Assignment
0 Petitions
Accused Products
Abstract
A hybrid electro-hydraulic drive system is provided for a vehicle and comprises a hydraulic transmission including a first hydraulic machine and at least one second hydraulic machine drivingly connected to drive wheels of the motor vehicle for driving thereof, an electric motor/generator operatively connected to the first hydraulic machine, and at least one energy storage device operable to store and release a hydraulic fluid energy or an electrical energy. The second hydraulic machine is a reversible hydraulic pump/motor unit capable to function both as a hydraulic pump and a hydraulic motor. The energy storage device is operatively connected to either the hydraulic transmission or the electric motor/generator. In a retarding mode the hydraulic transmission and/or the electric motor/generator retard the vehicle, while in a driving mode they supply a supplementary power to the drive wheels to assist propulsion of the vehicle.
-
Citations
21 Claims
-
1. A hybrid electro-hydraulic drive system for a motor vehicle having at least one pair of drive wheels, said drive system comprising:
-
a hydraulic transmission including a first hydraulic machine and at least one second hydraulic machine drivingly mechanically connected to at least one of said drive wheels of said motor vehicle for driving thereof; said first hydraulic machine hydraulically connected to said at least one second hydraulic machine for selectively supplying hydraulic fluid under pressure to said at least one second hydraulic machine so as to hydraulically drive said at least one second hydraulic machine; said at least one second hydraulic machine being a reversible hydraulic pump/motor unit capable to function both as a hydraulic pump and a hydraulic motor; an electric motor/generator operatively mechanically connected to said first hydraulic machine; and at least one energy storage device operable to store and release one of a hydraulic fluid energy and an electrical energy; said at least one energy storage device operatively connected to one of said hydraulic transmission and said electric motor/generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
Specification