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Method and test rig for testing a combination of components of a vehicle

A combination and test bench technology, applied in vehicle testing, mechanical component testing, machine/structural component testing, etc., can solve insufficient simulation and testing of high dynamic braking process, insufficient simulation and testing, delay time limits etc.

Active Publication Date: 2017-04-26
AVL LIST GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dynamics of rotational acceleration are limited by the test rig cardan shaft (shaft between the loader and the axle or wheel) and by the actual power (torque, rotational speed) of the loader and by the delay times of the aforementioned system components of the test rig
Therefore highly dynamic braking processes can only be simulated and tested insufficiently with the aid of conventional test bench structures as described in DE 10 2006 035 502 B3
[0009] In summary, due to the limited dynamics of the test bench, highly dynamic test runs of the drive train or of the vehicle, in particular test runs involving interventions in the brake system, can only be carried out to a limited extent and therefore only insufficiently. simulated and tested

Method used

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  • Method and test rig for testing a combination of components of a vehicle
  • Method and test rig for testing a combination of components of a vehicle
  • Method and test rig for testing a combination of components of a vehicle

Examples

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Embodiment Construction

[0024] figure 1 A drive train test stand is shown schematically as test stand 1, which comprises a vehicle drive train 2, which here comprises sideshafts 3, a differential 4, a drive shaft 5 and a transmission 6 as real components, which are operatively Installed on test bench 1. The drive train 2 is driven by a drive 7, such as an internal combustion engine or an electric motor, and generates a drive torque T A , which induces a sideshaft moment T H . Hereinafter it is generally referred to as the drive train torque T P , which collectively refer to the torque acting in the drive train 2 . The drive train 2 is connected to a loader 8, preferably an electric loader (dynamometer). For this purpose, the loader 8 is connected in a rotationally fixed manner to the wheel 9 , possibly via a suitable load shaft 10 , such as a cardan shaft, only the wheel hub being shown here for the sake of simplicity. Loader 8 produces load torque T D , which is applied to the drive train 2 ...

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Abstract

In order to be able to test a combination of components of a vehicle on a test rig with improved dynamics, it is provided that, in a simulation unit (20) on the basis of a simulation model (21) for the at least one component of the combination comprising a drive train moment (TP), which acts in the drive train (2), and a braking effect (B) of the braking system (11), the instantaneous drive train rotation speed (nP) of said component is calculated and the calculated instantaneous drive train rotation speed (nP) of the vehicle controller (14) is used in order to control the at least one component, and the calculated drive train rotation speed (nP) is used by a drive controller (23) in order to control the load machine (8).

Description

technical field [0001] The invention relates to a method and a test stand for testing an assembly of components of a vehicle, the assembly comprising a drive train, at least one vehicle controller handling the rotational speed of the drive train and a brake acting on the drive train on the test stand A system wherein the driveline of the vehicle is driven by a drive unit and a load torque is applied to the driveline by means of a loader coupled to the driveline, and at least one component of the combination is controlled by a vehicle controller based on the speed of the driveline. Background technique [0002] There are many vehicle controllers in a vehicle, such as hybrid controller, engine controller, transmission controller, driving dynamics control system, etc., to name a few, which may be interconnected with each other via one or more vehicle buses. Many such vehicle controllers process speed either at the wheels such as via ABS speed sensors, or at drivetrain component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02G01M17/007
CPCG01M13/025G01M15/00G01M17/00G01M17/0072B60T8/00G01M13/027G01M17/007
Inventor F·普菲斯特
Owner AVL LIST GMBH
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