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Hydraulic switching devices for motor vehicles

A technology for motor vehicles and facilities, applied in the direction of mechanical equipment, accumulator devices, components with teeth, etc., can solve problems such as oil pressure drop, engine components can no longer be driven and controlled, and achieve high efficiency

Active Publication Date: 2020-08-14
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage is that when the engine is stopped, the oil pressure in the engine circuit drops so that the switchable engine elements can no longer be actuated

Method used

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  • Hydraulic switching devices for motor vehicles
  • Hydraulic switching devices for motor vehicles
  • Hydraulic switching devices for motor vehicles

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Experimental program
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Embodiment Construction

[0018] according to figure 1 , 2 and 3 , the hydraulic switching system according to the invention for a motor vehicle (not shown here) has a hydraulic pump 1 which delivers hydraulic medium from a sump 2 via a hydraulic line 3 . The hydraulic medium is in particular the motor vehicle's engine oil. The engine oil is delivered to the solenoid valve assembly 4 via the hydraulic pump 1 through a filter device 11 for cleaning the engine oil and a cooling device 12 for cooling the engine oil. A pressure limiting valve 10 b is arranged in the relief line 3 d to the tank 2 downstream of the hydraulic pump 1 and upstream of the filter device 11 . When the preset oil pressure in the line region between pump 1 and filter device 11 is exceeded, pressure limiting valve 10 b opens and the engine oil is led back into sump 2 via relief line 3 d.

[0019] The solenoid valve assembly 4 has a magnetically actuatable switching valve 5 which is designed as a 3 / 2-way switching valve. A first c...

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PUM

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Abstract

The invention relates to a hydraulic switching device for a motor vehicle, comprising a hydraulic pump (1) which feeds hydraulic medium from a sump (2) via a hydraulic line (3) and at least via a magnetically actuatable The solenoid valve assembly (4) of the switching valve (5) feeds the switching element (6) in order to hydraulically actuate the switching element (6) between two switching positions. According to the invention, the pressure accumulator (7) and the first non-return valve (8a) are arranged in the delivery line (3a) upstream of the switching valve (5) in order to achieve a reliable, temporary oil pressure supply.

Description

technical field [0001] The invention relates to a hydraulic switching device for a motor vehicle, comprising a hydraulic pump which delivers hydraulic medium from a sump via hydraulic lines and at least via a solenoid valve assembly with a magnetically actuatable switching valve to the The switching element is hydraulically actuated between two switching positions. [0002] The invention relates in particular to hydraulic switching arrangements in motor vehicle engine applications, wherein engine oil from the oil sump of the engine is provided as hydraulic medium. Background technique [0003] Switching valves are generally known for actuating two-stage switchable engine components. In this case, the oil pressure prevailing in the engine oil circuit is used to actuate the locking mechanism of the switchable engine element, preferably by means of a 3 / 2-way switching valve. The reversing switching valve is actuated according to various parameters such as rotational speed, en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B1/02F16H61/06F16H61/30F15B21/00
CPCF15B1/024F15B21/041F15B2211/212F15B2211/30505F15B2211/30525F15B2211/40507F15B2211/41563F15B2211/50545F15B2211/5156F15B2211/7052F16H61/067F16H61/30F16H2061/305F15B21/0423
Inventor 马克斯·舍费尔沃尔夫冈·克里斯特根福尔克尔·施密特
Owner SCHAEFFLER TECH AG & CO KG