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Hydraulic system of a vehicle

A hydraulic system and vehicle technology, applied in the field of hydraulic systems, can solve problems such as difficult handling and complicated flow control, and achieve the effects of reducing energy consumption, simplifying control, and reducing size

Inactive Publication Date: 2016-04-27
丹佛斯动力系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flow control between circuits can be complex and intractable in order to meet safety requirements

Method used

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  • Hydraulic system of a vehicle
  • Hydraulic system of a vehicle

Examples

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Embodiment Construction

[0022] The invention is described below using a tractor as an example of a vehicle with a hydraulic system. The tractor itself is not shown in the drawings.

[0023] The tractor has a first hydraulic circuit 1 comprising a first pump 2 as a first pressure source and a hydraulic actuation device 3 as a first hydraulic consumer. The first actuation circuit 1 also includes a trailer brake 4 . However, the hydraulic actuation device 3 has a first priority and the trailer brake 4 has a second priority.

[0024] Furthermore, the tractor has a second hydraulic circuit 5 . The second hydraulic circuit 5 includes a second pump 6 as a second pressure source.

[0025] Furthermore, the second hydraulic circuit 5 comprises a second hydraulic consumer 7 , for example an actuator for a hitch of a tractor.

[0026] The two pumps 2 , 6 are pumps with variable displacement, for example with a swash plate whose inclination can be adjusted. The first pump 2 has an LS port 8 and the second pu...

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PUM

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Abstract

A hydraulic system of a vehicle is provided, said system comprising: a first hydraulic circuit (1) having a first pressure source (2) and at least a first hydraulic consumer (3, 4), a second hydraulic circuit (5) having a second pressure source (6) and at least a second hydraulic consumer (7), connecting means (10, 11) allowing a flow of hydraulic fluid at least from said first hydraulic circuit (1) to said second hydraulic circuit (5), and control means (16) for controlling operation of said hydraulic consumers (3, 4, 7). Such a hydraulic system should allow safe operation of a vehicle with low energy consumption of the hydraulic system. To this end said control means (16) are connected to summation demand means (12), said summation demand means (12) controlling flow of hydraulic fluid from at least said first hydraulic circuit (1) to said second hydraulic circuit (5), said summation demand means (12) being connected to operation mode signal means (17) outputting an operation mode signal indicative of an operation mode of said vehicle, wherein said summation demand means (12) allow or block flow of hydraulic fluid from one hydraulic circuit (1) to another hydraulic circuit (5) in dependency of said operation mode signal.

Description

technical field [0001] The invention relates to a hydraulic system of a vehicle, said system comprising: a first hydraulic circuit with a first pressure source and at least a first hydraulic consumer, a second hydraulic circuit with a second pressure source and at least a second hydraulic consumer, allowing Connection means for the flow of hydraulic fluid at least from the first hydraulic circuit to the second hydraulic circuit and control means for controlling the operation of the hydraulic consumers. Background technique [0002] Such a hydraulic system is described, for example, in DE 10 2008 038 793 A1. The vehicle for which the known system is used is an excavator with two crawlers, each driven by one of two hydraulic circuits. Furthermore, each hydraulic circuit can be used to operate other hydraulic consumers, such as the steering drive for the upper part of the excavator, for the bucket, etc. [0003] Normally, the two hydraulic circuits are connected to each other...

Claims

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Application Information

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IPC IPC(8): F15B11/17
CPCB62D5/07E02F9/2095E02F9/2242E02F9/2292E02F9/2296F15B11/17F15B2211/20576F15B2211/30595F15B2211/6658F15B2211/7142B60R16/08B62D5/062F15B11/163F15B2211/255F15B2211/426F15B2211/63
Inventor 克里斯坦森·喀斯特森
Owner 丹佛斯动力系统有限公司