Method and device for controlling the oil supply of an automatic gearbox and a starting element

一种自动变速器、控制装置的技术，应用在传动装置零件、传动装置控制、带有齿的元件等方向，能够解决出错、机械构造复杂、昂贵等问题，达到减少功率损失、低组件费用、低功率损失的效果

Inactive Publication Date: 2008-03-19
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Although in principle it is conceivable to decouple the rotational speed of the engine from the rotational speed of the mechanically driven oil pump, for example by means of an adjustable transmission, or to reduce the pump output of the oil pump and thereby reduce the output of the oil pump if necessary, for example by extracting an adjustable oil supply Reduce energy loss, however, these solutions are mechanically complex, expensive and error-prone

Method used

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  • Method and device for controlling the oil supply of an automatic gearbox and a starting element

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Embodiment Construction

[0079] From a common oil tank 1, a branched oil line leads to the suction side of the two oil pumps, where the oil tank 1 can be, for example, the oil sump of a transmission and / or an oil-cooled friction clutch, wherein the first oil pump 2 is supplied by the internal combustion engine 4 Driven mechanically, the second oil pump 3 is driven by an electric pump 5 . The discharge or pressure sides of the pumps 2 and 3 can be connected to each other via a main pressure valve 6, wherein, when the electric motor 5 is switched off, a first non-return valve 7 arranged behind the electrically driven pump 3 prevents oil from flowing back through the oil pump 3 to the in tank 1.

[0080] The two oil pumps 2, 3 are connected via the main pressure valve 6 to the pressure regulator and the shifting element 8 or to other hydraulic control devices, for example with the hydraulic actuators in the automatic transmission and / or with the components, in particular an actuator of an oil-cooled fri...

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PUM

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Abstract

A method and a device for controlling the oil supply of an automatic transmission (gearbox) and to a starting element. The method can guarantee a sufficient supply of oil to a hydraulic control unit of the automatic transmission and / or the starting element, in particular an oil-cooled friction clutch, both during the operation of the internal combustion engine (4) and when the latter is at a standstill with the aid of an oil pump (2) that can be mechanically driven by the internal combustion engine (4) and a second oil pump (3) that can be electrically driven. In addition, the cooling oil supply of the starting element is guaranteed by the provision of a low-pressure oil by way of the electrically driven oil pump (3), at least during the starting operation, the stream cooling the starting element (11).

Description

technical field [0001] The invention relates to a method and a device for controlling the oil supply of an automatic transmission and starter according to the preambles of independent claims 1 and 21 . Background technique [0002] Automatic transmission refers to the transmission that has been used especially in automobiles to convert the input speed of the automobile engine or starter into the output speed for driving the wheels, wherein, at least to a certain extent, it relieves the driver from choosing the appropriate speed. Burden in terms of transmission ratio. [0003] The transmission ratio of an automatic transmission can be continuously varied or can be provided as individual transmission ratios with fixed transmission ratios. They are shifted in several cases by means of hydraulic shifting elements and therefore require a sufficient oil supply in terms of volume flow and pressure for operation. In most cases, an oil pump mechanically driven by the vehicle engine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00F16H57/04
CPCF16H2061/0037F16H61/0031F16H2312/14F16H57/0434
Inventor 马蒂亚斯·赖施拉尔夫·德雷布霍尔兹格哈德·古姆波尔茨博格
Owner ZF FRIEDRICHSHAFEN AG
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