Idling fuel saving rate calculation method

Abstract

The invention belongs to the field of automobile idling fuel saving technology, and provides an idling fuel saving rate calculation method. The idling fuel saving rate calculation method comprises an S1 step of testing first fuel consumption at a first idling speed under a long idling condition; an S2 step of testing second fuel consumption at a second idling speed under the long idling condition; an S3 step of testing third fuel consumption at a third idling speed under the long idling condition; an S4 step of testing fourth fuel consumption at a third idling speed under an NEDC cyclic condition; an S5 step of calculating the fuel saving rate at the second idling speed under the NEDC cyclic condition and the fuel saving rate at the third idling speed under the NEDC cyclic condition, the first idling speed being greater than the second idling speed and the second idling speed being greater than the third idling speed. According to the invention, the fuel consumption is tested in the long idling way and converted into fuel consumption in the NEDC cycle, so that the fuel saving rate at a lower idling speed in the NEDC cycle is obtained, and the fuel saving effect of a vehicle can be truly reflected.

Description

technical field [0001] The invention belongs to the technical field of fuel saving at idle speed of automobiles, and in particular relates to a calculation method of fuel saving rate at idle speed. Background technique [0002] In the current national regulations on vehicle emission and fuel consumption tests, vehicles are required to follow the figure 1 The NEDC (New European Driving Cycle) cycle shown is tested. The NEDC cycle includes urban cycle 1 and suburban cycle 2. The urban working condition simulates the driving condition of the vehicle in the urban area, and the suburban working condition simulates the driving condition of the vehicle in the suburbs. working conditions. During the test, the vehicle was first left to stand for more than 8 hours, the engine water temperature and oil temperature were around 25°C, and then the vehicle was operated according to the NEDC working conditions for emission and fuel consumption tests. [0003] Now urban traffic is getting ...

AI Technical Summary

Problems solved by technology

However, in the existing NEDC cycle test, there is a lack of calculation of idling fuel-saving rate, which cannot show the real performance of the vehicle; and there are only 13 idling conditions in the NEDC cycle, and the total idling time is only 280 seconds. The fuel consumption under the working condition is very little, and there are test errors, driver's operation, etc., and the fuel-saving effect of reducing the idle speed can hardly be reflected in the NEDC working condition, that is, the fuel-saving rate of reducing the idle speed cannot be measured, but in actual use During the process, especially when urban traffic is congested, lowering the idling speed has a significant effect on fuel saving. Therefore, the existing NEDC cycle test lacks the calculation of idling fuel saving rate and cannot reflect the real situation of the vehicle.

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