Vehicle economy cruise control method based on engine universal characteristic

Abstract

The invention discloses a vehicle economy cruise control method based on an engine universal characteristic. Economy cruise adopts vehicle economy as a control target. A structure diagram of the control method comprises a safe interval judging module, a running resistance computing unit, an engine universal characteristic curve identifying module, an engine fuel consumption rate optimizing module, an executing control module, an engine, a vehicle ECU (Electronic Control Unit) and a sensor measurement signal. On the basis of ensuring the running safety of the vehicle, and according to the change of road resistance to the vehicle during running of the vehicle, the method is implemented through a closed loop control system which controlling the engine to always operate in an economy area of the engine universal characteristic, namely, the vehicle speed is regulated through controlling the openness of a throttling valve in real time to adapt to the change of the running resistance of the vehicle, so that the vehicle always cruises and runs at an economy speed. Therefore, according to the invention, the fuel economy of the engine can be effectively improved, the fuel consumption of the vehicle per one hundred kilometers can be effectively reduced, and the purposes of saving energy and reducing emission are well realized.

Description

technical field [0001] The invention is a control strategy based on the neural network fuzzy control vehicle speed based on the universal characteristics of the engine. It can constantly search for the economical speed under the condition of driving resistance according to the change of the driving resistance of the car, and control the car to always cruise at the economical speed. Background technique [0002] During the "Eleventh Five-Year Plan" period, the country proposed a strategy for energy conservation and emission reduction. During the "Twelfth Five-Year Plan", my country continued to implement energy conservation and emission reduction, and then proposed a specific "energy-saving and new energy vehicle" strategy, which shows that the country's fuel economy for automobiles and emission performance are constantly putting forward new requirements. [0003] Existing cruise technology is mainly based on adaptive cruise control with the control goal of maintaining a safe...

AI Technical Summary

Problems solved by technology

[0003] The existing cruise technology is mainly based on adaptive cruise control with the control goal of maintaining a safe distance between two vehicles, mainly aimed at improving driving comfort and driving safety, but there is no cruise control system with fuel economy as the control goal.

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