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Vehicle actual fuel consumption calculation method

A calculation method and practical technology, applied in the registration/indication of vehicle operation, instruments, registration/indication, etc., can solve problems such as calculation of fuel consumption error, fuel consumption without calculation of fuel consumption logic, etc.

Active Publication Date: 2019-05-03
WUXI WEIFU LIDA CATALYTIC CONVERTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But for regeneration by extra fuel injection in the exhaust pipe using the DPM unit, the amount of fuel injected for this part is not calculated in the fuel consumption logic of the ECU
As a result, the ECU calculates fuel consumption errors

Method used

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  • Vehicle actual fuel consumption calculation method
  • Vehicle actual fuel consumption calculation method

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0026] An exhaust gas aftertreatment system for a Euro VI standard vehicle, such as figure 1 As shown, including DPM unit (DPF active regeneration unit), DOC unit (oxidation catalyst), DPF unit (particulate trap), SCR unit (selective catalytic reduction device);

[0027] A method for calculating actual fuel consumption of a complete vehicle, comprising:

[0028] 1) Calculate the fuel consumption of the engine cylinder, as shown in formula (1):

[0029]

[0030] Among them, FISys_dvolFICons is the fuel consumption of the engine cylinder, the unit is L / h, InjSys_qTot is the fuel injection quantity in the engine cylinder, the unit is mg / hub; Epm nEng is the engine speed, the unit is r / min, Epm_numCyl is the number of engine cylinders, FISys_rhoFICnvFac is the fuel density, the unit is g / L;

[0031] For a four-stroke engine, every 2 revolutions corresponds to...

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Abstract

The invention provides a vehicle actual fuel consumption calculation method. The vehicle actual fuel consumption calculation method is characterized in that firstly, the engine cylinder fuel consumption is calculated, cumulative fuel consumption of an engine cylinder is calculated through integration; cumulative fuel consumption of a DPM unit during regeneration of the DPF unit is calculated, andfuel consumption per 100 kilometers of the vehicle is calculated based on the cumulative fuel consumption of the engine cylinder and the cumulative fuel consumption of the DPM unit during regenerationof the DPF unit. The method is advantaged in that the vehicle actual fuel consumption can be accurately calculated, and the needs of the fuel consumption calculation of Euro 6 vehicles with DPM unitsare met.

Description

technical field [0001] The invention relates to a method for calculating fuel consumption of a vehicle, in particular to a method for calculating actual fuel consumption of a complete vehicle. Background technique [0002] The calculation of the actual fuel consumption of the current vehicle is the ratio of the cumulative fuel consumption of the engine cylinder to the cumulative mileage. [0003] For Euro VI standard diesel engine vehicles, DPF devices are generally installed. For the regeneration of DPF devices using in-cylinder post-injection means for regeneration, the above calculation method is no problem. [0004] But for regeneration by extra fuel injection in the exhaust pipe using the DPM unit, the amount of injected fuel is not calculated in the fuel consumption logic of the ECU. As a result, the ECU calculates fuel consumption errors. Contents of the invention [0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C5/08
Inventor 陶建忠张斌苗垒
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER