Hydraulic arrangement

Patent metadata

Field	Value
Publication number	US-9284966-B2
Application number	US-201113818218-A
Country	US
Kind code	B2
Filing date	Oct 26, 2011
Priority date	Oct 29, 2010
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A hydraulic arrangement ( 10 ) to increase a motor load is described. The hydraulic arrangement comprises a hydraulic consumer ( 28 ), a load pressure-controlled hydraulic pump ( 24 ), a hydraulic tank ( 26 ), and a hydraulic control circuit ( 30 ), connected with the hydraulic consumer ( 28 ), with which a volume flow conveyed by the hydraulic pump ( 24 ) can be changed, wherein the hydraulic control circuit ( 30 ) comprises an excess pressure valve ( 42 ) and an electronically controllable control valve ( 36 ). In order to ensure a prioritization of the hydraulic consumer with a simultaneous increase of the motor bad, a proposal is made that the hydraulic control circuit ( 30 ) comprise a load pressure-controlled pressure compensator ( 38 ) between the excess pressure valve ( 42 ) and the control valve ( 36 ).

First claim

The invention claimed is:

1. A hydraulic arrangement comprising:
a hydraulic consumer;
a load pressure-controlled hydraulic pump driven by a vehicle combustion engine;
a hydraulic tank;
an electronic control unit;
a hydraulic control circuit connected with the hydraulic consumer and controlling a volume flow conveyed by the hydraulic pump, the hydraulic control circuit including:
an excess pressure valve connected to the hydraulic tank,
an electronically controlled control valve connected to the electronic control unit, the control valve connected to a hydraulic supply line connected to the hydraulic pump,
a load pressure-controlled pressure compensator connected between the excess pressure valve and control valve,
a first control pressure line that branches off from a load pressure line to the pressure compensator, the load pressure line connected to the hydraulic pump and to the hydraulic consumer,
a first hydraulic line that connects the control valve and the pressure compensator,
a second control pressure line that branches off from the first hydraulic line to the pressure compensator,
a second hydraulic line, connecting the pressure compensator and the excess pressure valve,
a third control pressure line connecting the second hydraulic line with the load pressure line, and
a nonreturn valve, which closes in the direction of the second hydraulic line, is located in the third control pressure line.

2. The hydraulic arrangement of claim 1 , wherein:
the pressure compensator is a proportional valve.

3. The hydraulic arrangement of claim 1 , wherein:
the control valve is a proportional control valve.

4. The hydraulic arrangement of claim 1 , wherein:
the control valve is controlled by a vehicle electronic control unit.

5. The hydraulic arrangement of claim 4 , further comprising:
a diesel particulate filter; and
a sensor which generates a signal representing an exhaust gas temperature or diesel particulate filter temperature, the sensor being connected to the electronic control unit, and the control valve is controlled as a function of the sensor signal to raise the exhaust gas temperature.

6. The hydraulic arrangement of claim 4 , further comprising:
a hydraulically operated gearing; and
a sensor which generates a signal representing an oil temperature of the gearing, the sensor being connected with the electronic control unit, and the control valve is controlled as a function of the sensor signal.

7. The hydraulic arrangement of claim 4 , further comprising:
a sensor which generates a signal representing a drag torque of the combustion engine, and the control valve is controlled as a function of the sensor signal.

8. The hydraulic arrangement of claim 1 , wherein the electronic control unit is configured to control the control valve to selectively increase loading of the hydraulic pump by causing a flow through the excess pressure valve thereby increasing loading of the vehicle combustion engine.

Assignees

• Seebode Mario
• Kazimiers Thilo
• Deere & Co

Inventors

• Seebode Mario
• Kazimiers Thilo

Classifications

• F15B21/042

  Controlling the temperature of the fluid · CPC title

• F15B2211/20546

  variable capacity · CPC title

• F02D29/04

  peculiar to engines driving pumps · CPC title

• F15B2211/665

  Methods of control using electronic components · CPC title

• F15B15/00

  Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith · CPC title