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Driving wheel surface output specified power loading detection method

A driving wheel, rated power technology, applied in the direction of measuring the traction/propulsion power of the vehicle, measuring device, vehicle testing, etc., can solve the problem of the large difference between the drive axle load and the detected vehicle speed, the uniformity and comparability of fuel consumption, etc. question

Active Publication Date: 2015-12-16
路亚科消防车辆制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing technology "Prescribed wheel edge power detection method", Chinese invention patent, patent number: ZL201210110890.2, the so-called automobile specified wheel edge power does not include the friction power of the wheel roller, because the friction resistance between the wheel and the roller is related to the wheel weight (or The greater the wheel weight, the greater the friction resistance, and the friction resistance is also proportional to the vehicle speed. The higher the vehicle speed, the greater the friction resistance. The drive shafts of passenger cars, vans, and fender trucks equipped with the same type of engine There is a big difference between the weight and the detected vehicle speed, and the uniformity and comparability of the detection of power, exhaust emissions or fuel consumption at the same specified wheel side are poor
Moreover, this method is only suitable for the detection of the rated power vehicle speed point, not for the detection of the maximum torque vehicle speed point, and it is only suitable for the detection of diesel vehicles, not for the detection of gasoline vehicles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Take a diesel vehicle as an example to illustrate the specific implementation of the detection method for the specified power output on the surface of the drive wheel. The parameters of the diesel vehicle: the rated power of the engine is 169kW, radial tires, and the specified power coefficient δe=δm at the rated power point and the maximum torque point =0.5, the power correction factor a is 0.986, the maximum torque is 800N·m, the maximum torque speed is 1400r / min, Pm=800×1400 / 9549=117.3kW (or Pm=0.715×169=120.8, error 3%), The drive shaft weighs 51600N.

[0018] a. First determine the vehicle speed Ve at the rated power point or the vehicle speed Vm at the maximum torque point, which can be obtained by calculating the technical parameters of the vehicle transmission ratio, wheel radius, etc., or through the calibration method of measuring the engine speed and vehicle speed, or by It is obtained from the statistics of the same model series, and Ve=Φ×Va can also be calc...

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Abstract

The invention discloses a driving wheel surface output specified power loading detection method. Under the rated power speed Ve or maximum torque speed Vm of a vehicle on a chassis power tester of the vehicle, the driving wheel surface output specified power deltae*Pe or deltam*Pm in the standard environment state is converted into a corresponding driving force Fe or Fm in a detected environment state, and after the corresponding driving force is balanced with the system resistance of frame resistance, wheel cylinder frictional resistance and loading force of a power absorption device, the power or exhaust emission or fuel consumption is detected under the working condition of stable speed, so that the unity and the comparability of detection of different vehicles assembled with the same engine are improved.

Description

technical field [0001] The detection method of the specified power output on the surface of the driving wheel is that the vehicle is on the chassis dynamometer, and the driving force corresponding to the specified power output on the surface of the driving wheel is balanced with the force of the stand resistance, the friction resistance of the wheel roller, and the loading resistance of the power absorbing device. The invention relates to a method for detecting power performance, exhaust emission or fuel consumption of a vehicle speed, belonging to the technical field of automobile performance detection. Background technique [0002] Existing technology "Prescribed wheel edge power detection method", Chinese invention patent, patent number: ZL201210110890.2, the so-called automobile specified wheel edge power does not include the friction power of the wheel roller, because the friction resistance between the wheel and the roller is related to the wheel weight (or The greater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01L5/13
Inventor 吴明
Owner 路亚科消防车辆制造有限公司
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