Method of controlling oil level in a gearbox and gearbox for implementing said method

A gearbox and oil level technology, applied in gear lubrication/cooling, belt/chain/gear, transmission parts, etc., can solve problems such as large agitation loss

Active Publication Date: 2021-10-22
AVL LIST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Especially at higher vehicle speeds, greater churning losses occur when the oil level is too high

Method used

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  • Method of controlling oil level in a gearbox and gearbox for implementing said method
  • Method of controlling oil level in a gearbox and gearbox for implementing said method
  • Method of controlling oil level in a gearbox and gearbox for implementing said method

Examples

Experimental program
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Embodiment Construction

[0030] The figures respectively show a differential gearbox 1 of a vehicle, wherein two pneumatically separated compartments are arranged inside the housing 2 of the differential gearbox 1, namely an oil sump 3 and an oil sump hydraulically connected to each other by at least one oil channel 34 Oil reservoir 4. The first air line 5 leads into the oil sump 3 and the second air line 6 leads into the oil reservoir 4 , wherein the flow through the air lines 5 , 6 can be controlled by means of a control valve 7 . The control of the control valve 7 is performed by an electronic control unit ECU, which receives at least one characteristic operating parameter (eg vehicle speed v) as an input variable. The control valve 7 is in each case designed as a multi-way valve, wherein a first connection a is connected to the first air line 5, a second connection b is connected to the second air line 6, a third connection c is connected to the The pressure line 9 of the pressure source 8, and t...

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PUM

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Abstract

The invention relates to a method for controlling the oil level (h3) in a differential gearbox of a vehicle having an oil sump (3) and an oil reservoir (4) pneumatically separated from the oil sump (3). The oil reservoir (4) is connected to the oil sump (3) through at least one oil passage (34), and the oil sump (3) is connected to a pneumatic pressure source (8) through at least one control valve (7) and an air line (5), wherein In at least one position (B) of the control valve (7), the pressure source (8) is pneumatically connected to the oil sump (3). To improve efficiency, at least one first characteristic operating parameter of the vehicle is detected according to the invention and the control valve (7) is operated at least according to said first characteristic operating parameter, wherein vehicle speed (v) is selected as the first characteristic operating parameter.

Description

technical field [0001] The invention relates to a method for controlling the oil level in a differential gearbox of a vehicle having an oil sump and an oil reservoir separate from the oil sump, wherein the oil reservoir is connected to the oil sump via at least one oil passage, and the oil sump is connected via At least one control valve and the air line are connected to a pneumatic pressure source, wherein in at least one position of the control valve the pressure source is pneumatically connected to the oil sump. Furthermore, the invention relates to a differential gearbox for carrying out the method. Background technique [0002] DE 10 2009 045 426 A1 describes an arrangement for equalizing pressure and / or coolant levels in different housing parts of a transmission of a vehicle with a compressed air supply. Compressed air for draining oil through at least one oil channel in the housing part with the lower oil level may be directed via a compressed air supply into the hou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/04
CPCF16H57/0409F16H57/0447F16H57/037F16H57/0435
Inventor J·托奇特尔曼
Owner AVL LIST GMBH
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