Real-time oil consumption calculation method for gasoline car on the basis of OBD (On-Board Diagnostic) vehicle state information

Abstract

The invention provides a real-time oil consumption calculation method for a gasoline car on the basis of OBD (On-Board Diagnostic) vehicle state information. The method comprises the following steps that: according to a gasoline car engine theory, calculating an instantaneous fuel consumption amount; according to a vehicle working condition and an engine combustion state, judging the concentration of air fuel combination gas, and regulating a fuel correction factor to regulate the concentration of real-time air fuel combination gas; regulating a long-time fuel correction coefficient to determine a value when the combination gas is under an over-rich or over-thin state for a long time; according to an OBD-II protocol, calculating an engine load rate, and carrying out calibration on a real-time air inflow; aiming at an adaptability problem of the OBD protocol, adopting a corresponding calculation method; and optimizing an OBD collection data target function. By use of the method, a calculation error generated when an electronic fuel injection engine is subjected to electronic control fuel cut can be effectively removed, the calculation accuracy of the instantaneous fuel consumption amount is greatly improved, and the method can be widely applied to the vehicle state monitoring and fault diagnosis of the fuel consumption amount.

Description

technical field [0001] The invention belongs to the technical field of automobile electromechanical mixing, and in particular relates to a method for calculating real-time fuel consumption of a gasoline vehicle based on OBD vehicle state information. Background technique [0002] Fuel consumption is the main evaluation index of vehicle fuel economy. For traditional energy vehicles such as internal combustion engines, fuel economy is the most important indicator for evaluating vehicle performance. Factors that affect vehicle fuel economy include road traffic environment, vehicle mechanical performance, and driver's driving behavior. However, it is difficult to improve the fuel economy of vehicles by improving the traffic environment in a short period of time; after long-term accumulation, the current internal combustion engine technology has been quite mature after long-term development, and it is difficult to significantly improve the fuel economy of vehicles by improving i...

AI Technical Summary

Problems solved by technology

However, it is difficult to improve the fuel economy of vehicles by improving the traffic environment in a short period of time; after long-term accumulation, the current internal combustion engine technology has been quite mature after long-term development, and it is difficult to significantly improve the fuel economy of vehicles by improving internal combustion engine technology and other measures ; It is impossible to grasp the running status and status of the vehicle in real time, especially the fault of the vehicle cannot be obtained in time, so that there is a great potential safety hazard in the operation of road vehicles

[0003] The current vehicle status monitoring and fault diagnosis are mostly for professionals, and lack of vehicle status monitoring and fault diagnosis for drivers, so it is difficult for ordinary drivers to intuitively obtain such information

In the measurement of vehicle real-time fuel consumption, the measurement accuracy of real-time fuel consumption is low without structural changes to the vehicle, installation of special measuring instruments and acquisition of the vehicle manufacturer's own bus protocol

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