Manual mechanical transmission efficiency testing method based on NEDC working condition

A technology of efficiency testing and manual machinery, applied in machine gear/transmission mechanism testing, instruments, measuring devices, etc., can solve the problems of evaluating transmission consistency, fuel consumption difference, and many test operating points, so as to reduce test data points, The effect of reducing test cost and shortening test time

Inactive Publication Date: 2019-12-10
SAIC-GM-WULING AUTOMOBILE CO LTD
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Problems solved by technology

However, there is a large difference in the average retarding force of each gear of the gearbox, especially in the high gear, and experience has proved that there is also a large difference in the fuel consumption of the car, so it is impossible to evaluate the consistency of the transmission by this method
[0006] 3. There are too many test points, which to a certain extent increases the difficulty of random checking the efficiency qualification or consistency of the transmission assembly

Method used

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  • Manual mechanical transmission efficiency testing method based on NEDC working condition
  • Manual mechanical transmission efficiency testing method based on NEDC working condition
  • Manual mechanical transmission efficiency testing method based on NEDC working condition

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the description of the drawings and specific embodiments.

[0040] Such as Figure 1 to Figure 3 Shown, a kind of manual mechanical transmission efficiency test method based on NEDC operating condition, comprises the following steps:

[0041] 1) During the NEDC (New European Driving Cycle, new standard European cycle test) fuel consumption test, the actual measurement records or accurately infers the speed, torque and transmission oil temperature data at the input end of the transmission assembly. The data sampling frequency is required to be no more than 10Hz and the three parameters The sampling frequency should be the same;

[0042] 2) Carry out two-dimensional frequency statistics based on the input speed and torque, and calculate the total time ratio a;

[0043] 3) Take the two points with the largest proportion of time as the transmission working point, read the corresponding speed and tor...

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Abstract

The invention provides a manual mechanical transmission efficiency testing method based on an NEDC working condition. The method comprises the following steps: S1, during NEDC oil consumption testing,the rotating speed, torque and transmission oil temperature data of the input end of a transmission assembly are actually measured and recorded or accurately deduced, the data sampling frequency is required not to exceed 10 Hz, and the sampling frequencies of the three parameters need to be consistent; s2, two-dimensional frequency statistics is conducted according to the rotating speed and the torque of the input end of the transmission assembly, and the total time proportion a of time is calculated; the method has the advantages that 1, test data points are reduced, test time is shortened,test cost is reduced; 2, qualification or consistency of efficiency of the transmission assembly can be evaluated simply and reliably; 3, influence of the efficiency of the transmission assembly on oil consumption of a whole vehicle can be predicted well, and the method is matched with actually-measured oil consumption accurately.

Description

technical field [0001] The invention relates to a test method, in particular to a test method for the efficiency of a manual mechanical transmission based on NEDC working conditions. Background technique [0002] The manual mechanical transmission assembly is an important part of the power transmission of the vehicle, and its transmission efficiency has a crucial impact on the fuel consumption of the vehicle. The existing manual mechanical transmission assembly efficiency test method is carried out according to the efficiency Map test method in the industry standard QC / T568.1-2011. The efficiency Map test method has a total of 200 or 240 test operating points, which are composed of a matrix of four variables: the test torque at the engine output end, the test speed at the engine input end, the oil temperature of the transmission, and the gear position of the transmission: the engine torque at the input end is the maximum transmission torque 50% and 100% are 2 points in tota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/26G01M13/02G06F17/18
CPCG01L3/26G01M13/02G06F17/18
Inventor 蒋华梁满兴家梁玮何润张涵
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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