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Method and device for determining load spectrum for transmission in motor vehicles

A technology for transmissions and motor vehicles, applied to mechanical equipment, registration/indicating vehicle operation, instruments, etc., can solve the problem of complex and expensive assembly of torque sensors

Active Publication Date: 2014-12-03
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Torque sensors are complex and expensive to assemble and are therefore not suitable for regional use in fleets

Method used

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  • Method and device for determining load spectrum for transmission in motor vehicles
  • Method and device for determining load spectrum for transmission in motor vehicles
  • Method and device for determining load spectrum for transmission in motor vehicles

Examples

Experimental program
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Embodiment Construction

[0029] exist figure 1 , the engine speed nMot and the actual engine torque MMot are collected or determined in the engine operating parameter function box 1. The rotational speed nHA of the drive wheel (here the rear wheel) is determined by a sensor on the drive wheel 2 . The rotational speed nHA of the drive wheels is calculated together with the engine rotational speed nMot in gear determination block 3 to determine the corresponding current gear.

[0030] In a transmission torque determination block 4, a transmission torque Md is calculated from the operating parameters MMot, nMot and other operating parameters discussed in further detail below.

[0031] In the classification block 5, in order to determine the load spectrum, a matrix is ​​generated from the continuously calculated transmission torque values ​​Md in which, for each gear, the transmission torque Md is at a defined transmission torque level (Md i; i= 1, 2, 3 . . . ) are recorded and stored, for example, firs...

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PUM

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Abstract

According to the invention, for determining the load spectrum of a transmission for motor vehicles, the transmission torque at the transmission input is calculated continuously from prescribed operating parameters. A matrix is generated from the continuously calculated transmission torque values, in which the frequency of occurrence of a transmission torque in a defined transmission torque class is entered and stored for each gear. The stored values in the matrix are preferably saved in a non-volatile memory for each shifting procedure during motor vehicle operation, and evaluated external to the vehicle for new development of transmissions.

Description

technical field [0001] The invention relates to a method and a device for determining a load spectrum of a transmission in a motor vehicle, as well as the use of the method and a motor vehicle having the device. Background technique [0002] Such a method is known, for example, from DE 10 212 530 A1. Basically, it is known to determine the so-called load spectrum, ie the time-varying load, mostly in the form of vibrations, in the context of the service life of mechanical components. Generally, the load spectrum of the transmission is determined on the basis of the actual engine torque from the engine control or on the transmission torque measured by means of a torque sensor. When using the actual engine torque, the alternating torque and moment of inertia components of the transmission load are not detected. Torque sensors are complex and expensive to assemble and are therefore not suitable for regional use in fleets. Contents of the invention [0003] The object of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07C5/08F16H61/02B60W30/18
CPCG07C5/085F16H2059/147F16H2057/02086
Inventor G·龙纳W·瓦斯特尔
Owner BAYERISCHE MOTOREN WERKE AG
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