Hydraulic transmission circuit
AssigneePoclain Hydraulics Industrie
InventorsKyle Arndt, Jean Heren
Life of this patent
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Abstract
Hydraulic transmission circuit with N hydraulic motors, wherein each motor comprises N sub-motors, all N2 sub-motors having the same cylinder displacement. The circuit comprises one common feed duct, adapted for receiving fluid under pressure, and to which one feed sub-motor of each motor is connected; one common exhaust duct, adapted for ejecting exhaust fluid, and to which one exhaust sub-motor of each motor is connected; N serial ducts, each serial duct connecting a feed, first sub-motor to an exhaust, N-th sub-motor via N−2 interposed sub-motors, these N connected sub-motors respectively belonging to the N motors. This circuit allows tight synchronization of the N hydraulic motors.
Claims14
Hydraulic transmission circuit with a first number of hydraulic motors, said first number being an integer superior or equal to 2, wherein
- each motor comprises sub-motors, the number of said sub-motors being equal to said first number of motors, all said sub-motors having the same cylinder displacement;
- the circuit comprises one common feed duct adapted for receiving fluid under pressure, and to which one feed sub-motor of each motor is connected;
- one common exhaust duct, adapted for ejecting exhaust fluid, and to which one exhaust sub-motor of each motor is connected;
- serial ducts, the number of said serial ducts being equal to said first number of motors, each serial duct connecting a feed, first sub-motor to an exhaust sub-motor via said first number minus two interposed sub-motors, said connected sub-motors respectively belonging to said.
Vehicle, comprising
- a hydraulic transmission circuit with a first number of hydraulic motors, said first number being an integer superior or equal to 2, wherein
- each motor comprises sub-motors, the number of said sub-motors being equal to said first number of motors, all said sub-motors having the same cylinder displacement;
- the circuit comprises one common feed duct adapted for receiving fluid under pressure, and to which one feed sub-motor of each motor is connected;
- one common exhaust duct, adapted for ejecting exhaust fluid, and to which one exhaust sub-motor of each motor is connected;
- serial ducts, the number of said serial ducts being equal to said first number of motors, each serial duct connecting a feed, first sub-motor to an exhaust sub-motor via said first number minus two interposed sub-motors, said connected sub-motors respectively belonging to said motors;
- the circuit further comprising auxiliary ducts;
- each auxiliary duct joining the common feed duct or an outlet of a sub-motor of a disynchronisable motor, to the common exhaust duct or the inlet of a sub-motor of a disynchronisable motor;
- each auxiliary duct comprising an auxiliary valve;
- and with the auxiliary ducts, sub-circuits are defined within the circuit, the number of said sub-circuits being equal to said second number of disynchronisable motors, each of said sub-circuits:
- a) being connected upstream to the common feed duct;
- b) being connected downstream to the common exhaust duct;
- c) passing from the inlet to the outlet through said first number of sub-motors of disynchronisable motors;
- each sub-motor of the disynchronisable motors being part of only one of said sub-circuits,
- said vehicle further comprising
- detection means for detecting that the vehicle is in a curve, and
- valve control means (ECU) for controlling said auxiliary valves;
- wherein said valve control means are adapted to open said auxiliary valve(s) when the detection means detect that the vehicle is in a curve, whereby, when said auxiliary valves are open, said sub-circuits are at least partially open allowing fluid to flow through said sub-circuits, so that the fluid flow through the disynchronisable motors is different from the fluid flow through the other motors, and said disynchronisable motors run at a different speed from the other motors.
Dependencies are inferred from the claim text.