An advanced commercial vehicle shift reminder control method and system

Abstract

The invention discloses an advanced commercial vehicle gear shift reminder control method, which belongs to the technical field of gear shift control and mainly solves the technical problem of frequent prompts for adding and subtracting gear positions in existing gear shift reminder methods. The method includes the following steps: S1. When the vehicle speed is less than the threshold, calculate the engine speed and maximum engine torque after upshifting. If the engine speed and engine maximum torque meet the requirements, remind the driver to upshift; S2. When the vehicle speed is not less than the threshold, calculate the speed of each gear Engine speed, engine maximum torque and specific fuel consumption and get the first small specific fuel consumption gear, the second small specific fuel consumption gear, the third small specific fuel consumption gear; from the first small specific fuel consumption gear, the second small specific fuel consumption gear, the third small specific fuel consumption gear Select the best gear from the fuel consumption gear and remind the driver to switch to the best gear. The invention also discloses a control system for realizing the above method. The present invention can take both power and fuel economy into account, and avoids frequent prompts for increasing and decreasing gear positions.

Description

technical field [0001] The present invention relates to the technical field of shift control, more specifically, it relates to an advanced commercial vehicle shift reminder control method and system. Background technique [0002] At present, the driver is still the main body of the car operation, and different drivers have different driving behaviors and driving habits. Good driving behavior can reduce the fuel consumption and pollutant emissions of the car. Drive fuel-saving key points, drivers with better driving skills can save fuel by 2%-4%, drivers with average driving skills can save fuel by 4%-7%, and drivers with poor driving skills can save fuel. Oil 7%-12%. Choosing the right gear at the right time is an important part of good driving behavior. [0003] At present, manual transmissions still account for a large proportion of traditional power commercial vehicles in China. Drivers who do not understand the working principle of engines and fuel economy areas, espec...

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Problems solved by technology

[0010] In addition to the above shortcomings, if the above two types of solutions are applied to passenger cars, since passenger cars have fewer gears, it is appropriate to use the method of prompting for upshifts and downshifts, but for the number of gears less than 10 For the above-mentioned commercial vehicles, in the middle and high gears, the transmission ratio of each gear has a small difference, and the engine working conditions of each gear will be relatively close. If this kind of scheme is still adopted, there may be frequent prompts to increase or decrease gears. Happening

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