A finite variable speed cruise method for vehicles

Abstract

The invention provides a limited variable-speech cruise method for a vehicle. By means of the vehicle internet, speed and power data of the vehicle during constant-speed cruise are collected, the power data are converted into gaussian distribution data with a load coefficient as a mathematical expectation through gaussianization, and different load coefficients are clustered from the gaussian distribution data; a speed and power characteristic curve is fitted from rotation speed and power historical data which the load coefficients belong to by means of a cubic polynomial; speed and power data of the vehicle are sampled in real time, are uploaded to a vehicle internet center and are matched with the characteristic curve fitted by the vehicle internet center, and accordingly a currently matched characteristic curve is obtained; oil consumption of the vehicle cruising at different speeds in a limited interval is predicted by means of rules of the matched characteristic curve, the cruising speed is trimmed from the limited interval to an engine economic interval according to the prediction result, and the aim of improving economy of oil consumption of the vehicle during cruising is achieved. By means of the limited variable-speech cruise method, oil conservation of the vehicle can be guaranteed in the whole cruising process, and the function of saving oil is automatically achieved.

Description

technical field [0001] The invention relates to the technical field of vehicle production, in particular to a cruising method with limited variable speed for a vehicle. Background technique [0002] Cruise control can make the car run at a constant speed at a preset speed on high-grade roads such as expressways or urban expressways, reduce driver fatigue, and bring great convenience to drivers. However, the existing cruising systems basically focus on how to automatically maintain the set cruising speed of the vehicle according to different external conditions, and seldom consider the economy of cruising. According to the universal characteristic map of the automobile engine, it can be known that the automobile engine has the most economical speed range. In this speed range, the fuel economy of the engine is better than other speeds. When the car is cruising at the speed V, take a small speed change threshold ε that does not affect the driving experience, so that the cruisi...

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Problems solved by technology

[0004] Another example is a "cooperative adaptive cruise fuel-saving device based on a single-chip microcomputer" see the Chinese patent with the publication number: 203047252U, and the publication date is 2013-07-10. actions and current fuel consumption, and finally generate a composite map of fuel consumption, which belongs to the offline scheme, and realizes driving action prompts and fuel consumption statistics; influences

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