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Detection method of automotive constant speed full load fuel consumption rate

A fuel consumption rate and detection method technology, applied in the direction of internal combustion engine testing, measuring devices, engine testing, etc., can solve the problems of large dispersion and low accuracy of fuel consumption, and improve detection efficiency, operability, and discreteness Reduced, simple operation and stable effect

Inactive Publication Date: 2010-05-12
吴明
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Problems solved by technology

[0006] (4) The fuel consumption per 100 kilometers of the vehicle road test of different models of the same model series has a large dispersion. Using the average limit value determined by the statistics of the model series to evaluate, the accuracy of the evaluation of many models is too low

Method used

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  • Detection method of automotive constant speed full load fuel consumption rate

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Embodiment Construction

[0022] Take the detection of a 1070 series diesel truck as an example, the rated power P of the diesel engine of the truck e =96kW, rated speed n e =3400r / min, rated torque M m =280N·m, rated torque speed n m =1900r / min, the transmission ratio of the main reducer i 0 =6.142, gearbox 4th gear ratio i 4 =1, the tire calculation radius R = 0.38m, the minimum fuel consumption rate of the engine at full load is 221g / (kW·h), and the minimum fuel consumption rate The engine speed range is about 1700r / min ~ 2200r / min.

[0023] 1. The output power of the driving wheel of the car is 50.3kW at a constant speed of 50km / h in direct gear. When the constant speed and power are stable, the fuel consumption measured continuously for 30 seconds is 150.7mL. Calculated according to the diesel density of 0.845kg / L, The fuel consumption is G=150.7×0.845=127.3g.

[0024] 2. Using the method of increasing and decreasing inertia twice, the power loss of the whole system of the vehicle and the gan...

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Abstract

The invention discloses a detection method of automotive constant speed full load fuel consumption rate. A gear-box high gear is hung on a chassis dynamometer of an automobile; under the full load mode of the engine which is in the position of the maximum accelerator pedal, the fuel oil consumption of the automobile is detected by keeping a constant automobile speed at stipulating speed point in a regulated time; meanwhile the output power of a driving wheel of an engine full load automobile is measured; then the loss power of the stipulating automobile speed point and the whole system of a rack is measured; the loss power of engine accessory is set at the stipulating speed point; the three powers are summed and the normal-state power is revised to obtain the output power of the engine at the speed point; and the full-load fuel consumption rate of the automotive engine is obtained by calculation, and the load ratio of the engine is obtained.

Description

technical field [0001] This method is to detect the fuel consumption of the vehicle within a specified time at a specified medium speed and constant speed under the full load condition of the engine with the maximum accelerator pedal position of the gearbox on the chassis dynamometer, and by detecting the output of the vehicle engine. A detection method for calculating the fuel consumption rate of a vehicle at constant speed and full load, belonging to the technical field of vehicle test economic performance detection methods. Background technique [0002] The fuel consumption test of existing cars per 100 kilometers is performed on the chassis dynamometer, with the gearbox mounted on the high-speed gear, medium speed and constant speed, and the load of the vehicle road test is simulated at the specified speed bench test. In this case, there are errors in the following aspects when detecting the fuel consumption per 100 kilometers of the car: [0003] (1) The specified vehi...

Claims

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Application Information

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IPC IPC(8): G01F9/00G01M15/00G01M15/04
Inventor 吴明
Owner 吴明
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