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Method and device for identifying a passive rolling moment of a motor vehicle

A technology of starting process, automobile, applied in the direction of transmission control, elements with teeth, clutches, etc., to achieve the effect of simple cost

Inactive Publication Date: 2009-06-24
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, increased fuel consumption and wear can occur in this process due to additional clutch shifts and engine speed increases

Method used

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  • Method and device for identifying a passive rolling moment of a motor vehicle
  • Method and device for identifying a passive rolling moment of a motor vehicle
  • Method and device for identifying a passive rolling moment of a motor vehicle

Examples

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Embodiment Construction

[0040] Therefore in figure 1 A truck 1 is shown, which has a drive motor 2 in the form of an internal combustion engine and a speed change transmission in the form of an automatic shift transmission 3 . The drive motor 2 and the transmission 3 can be connected to one another in a non-positive manner via a self-starting element 4 designed as a friction clutch. The automatic starter clutch 4 can be controlled by means of an actuator (not shown) by means of the control device 15 . The transmission torque of the transmission engine 2 , which is converted by the transmission 3 , can be transmitted in a known manner via the transmission output shaft 5 and the differential 6 to the driven vehicle wheels 7 , 8 of the truck 1 .

[0041] The starter clutch 4 is connected via its primary side 9 to the drive motor 2 via a drive shaft (crankshaft) 10 and via its secondary side 11 to a transmission input shaft 12 leading into the transmission 3 . In addition, rotational speed sensors 13 a...

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PUM

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Abstract

The invention relates to a method for identifying a passive rolling moment of a motor vehicle (1), for example an undesired rolling moment with which the vehicle (1) starts moving in a direction opposite to a direction of travel in relation to a selected speed. According to said method, means detect reverse rotational directions of a secondary side (11) of an automatic starting element (4) which is connected to a transmission input shaft (12) of a variable speed transmission (3) in relation to a primary side (9) of the start-up element (4) connected to a driving shaft (10) of a drive engine (2), a transmission oil pump (16) which delivers independently of the rotational direction being associated with the variable speed transmission (3). The aim of the invention is to provide a simple and inexpensive method for identifying reverse rotational directions close to the begin of a starting process. For this purpose, the number of revolutions of the transmission input shaft (12) and the oil pressure in the variable speed transmission (3) are detected in a time-resolved manner and subjected to a correlation examination by way of which unequal rotational directions of the primary side (9) and of the secondary side (11) of the starting element (4) are detected when there is insufficient correlation and, as a result, drive-related measures are taken to counteract an identified undesired passive rolling moment. The invention also relates to a device for carrying out said method.

Description

technical field [0001] The invention relates to a method and a device for detecting a passive starting process of a motor vehicle according to the preamble of claim 1 or the preamble of claim 11 . Background technique [0002] In vehicles equipped with an automatic or automatic shift transmission, the automatic starting element, especially the starting clutch, is controlled during the starting process, parking process or gear shifting process, through which the drive train and the transmission are controlled. The linkage of the engine has an effect. For this purpose, various operating-relevant sensor data (such as engine speed, transmission input speed, accelerator pedal position, road speed and shift intention) are transmitted to the electronic control unit and, after a corresponding evaluation, likewise in variable engagement The opening or closing of the starting clutch can be triggered by the degree or opening of the clutch in order to ensure trouble-free and comfortabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D48/06F16H59/44F16H61/20B60W30/18
CPCF16H2059/443F16H59/42F16D2500/30415B60W10/06B60W10/02F16H59/72B60W2510/1075F16H61/12F16D2500/3102F16D2500/3067B60W30/18118F16D48/06B60W2710/0644B60W2520/06F16D2500/30805B60W30/184F16D2500/50296F16H59/44F16H61/20
Inventor 伯恩特·都贝勒诺伯特·维恩切克
Owner ZF FRIEDRICHSHAFEN AG
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