Chassis dynamometer suitable for both heavy-duty vehicle and light-duty vehicle

Abstract

The invention discloses a chassis dynamometer suitable for both a heavy-duty vehicle and a light-duty vehicle. In the invention, a power absorption device with larger loading power is adopted; a free roller is assembled so as to be suitable for heavy-duty vehicle dual drive axle detection; the diameters of twin rollers and a setting angle are appropriately enlarged, so that the shaft system resistance of the twin rollers and the frictional resistance of a light-duty vehicle wheel roller are approximate to the corresponding resistance of the chassis dynamometer, and the twin rollers are connected by mechanical drive at the ratio of 1:1 to carry out loss power ratio and loading control accuracy detection; after being disconnected, the two rollers detect various performances of a vehicle; a temperature sensor is assembled on an eddy current machine to accurately implement targeted transient variable speed to quantitatively control loading; the basic inertia of the two roller shaft systems is divided into two stages and is suitable for transient working condition detection of light-duty vehicles with different reference mass and stationary working condition detection of the lesser small rack inertia; and a fan is additionally arranged to carry out air cooling on the eddy current machine, thus detection on various performances of the heavy-duty vehicle and the light-duty vehicle can be carried out on the universal rack.

Description

technical field [0001] Universal chassis dynamometer for light and heavy vehicles, by optimizing the design of technical parameters and adding corresponding functions, it is a kind of test that enables both light and heavy vehicles to perform power performance, exhaust emission performance, fuel economy performance, and sliding performance on this bench The utility model relates to a novel double-drum chassis dynamometer, which belongs to the technical field of automobile performance testing equipment. Background technique [0002] Different industry standards of foreign and domestic chassis dynamometers regulate the different structural parameters and power absorption device requirements of light and heavy vehicle chassis dynamometers. Background technical reference documents: Transportation industry standard JT / T445-2008 "Automotive chassis dynamometer" ;Environmental protection industry standard HJ / T291-2006 "Technical Requirements for Exhaust Pollutant Measuring Equipmen...

AI Technical Summary

Problems solved by technology

[0003] 1. The transportation industry standard stipulates different chassis dynamometer models according to the rated load capacity of 3 tons, 10 tons, and 13 tons. The 3-ton model is difficult to apply to heavy vehicles, and the 10-ton model specification is a double-axis type without free rollers, which cannot Suitable for heavy-duty vehicles with double drive axles, the center distance of the 13-ton model specification is too large to be suitable for light-duty vehicles

[0004] 2. The environmental protection industry standard regulates the different structural parameters of light and heavy vehicle chassis dynamometers, the basic inertia of the bench and the requirements of the power absorption device, and the bench cannot be used for light and heavy vehicles.

[0005] 3. Both the environmental protection industry standard and the transportation industry standard require the configuration of anti-drag motors and the front and rear double rollers to be connected by 1:1 transmission machinery, which is likely to cause parasitic power

[0006] 4. Both the environmental protection industry standard and the transportation industry standard do not require the measurement of the temperature of the eddy current machine, and it is difficult to accurately realize the transient variable speed quantitative control loading at different temperatures of the eddy current machine

[0007] The limitations of the classification of chassis dynamometers for light-duty vehicles and heavy-duty vehicles require at least two sets of equipment for testing stations and repair shops, which increases investment and reduces the utilization rate of equipment for users with a small number of vehicles to be tested