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Control method for optimal economical rotation speed of engine

A technology of engine speed and control method, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve problems such as increasing vehicle cost, reducing vehicle quality, and increasing vehicle cost.

Active Publication Date: 2015-12-30
XIAMEN GOLDEN DRAGON BUS
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] (1) Choose a higher-performance engine, such as imported Cummins engine, Hino engine, etc., but the price of a high-performance engine is higher, which will lead to an increase in vehicle cost;
[0006] (2) Choose a dual-clutch gearbox to improve the transmission efficiency of the engine, but the application of this technology in passenger cars is not yet mature, and it will also increase the cost of the vehicle;
[0007] (3) Reduce the quality of the vehicle, which requires the use of various new materials. Based on technical and cost considerations, breakthrough development cannot be achieved at this stage
[0008] However, by strengthening the operation and management of passenger transport companies, there are still relatively few service car add-on products that guide drivers to drive correctly. areas for improvement

Method used

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  • Control method for optimal economical rotation speed of engine
  • Control method for optimal economical rotation speed of engine
  • Control method for optimal economical rotation speed of engine

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Embodiment Construction

[0045] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] Such as figure 1 Shown, a kind of control method of the present invention realizes engine optimum economic speed, comprises the steps:

[0047] Step 1: The vehicle controller obtains the vehicle operating condition information: including obtaining the vehicle speed Va, engine speed N, neutral signal and reverse signal through the CAN bus, and at the same time read the preset gearbox speed ratio igX in the vehicle controller, where X is The forward gear, the rear axle speed ratio i0, the specific fuel consumption rate Ge of the engine's universal characteristic parameters, the torque Me at different speeds, the tire rolling radius r, the power factor range D of each gear, and the transmission efficiency ηr;

[0048] Step 2: The vehicle controller judges whether the vehicle is in the forward gear according to the information collected i...

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Abstract

The invention discloses a control method for the optimal economical rotation speed of an engine. Vehicle operation working condition information is obtained through a CAN bus by a vehicle controller, then whether a vehicle is in a forward gear is judged, then the vehicle controller calculates the current actual operation gear according to collected data, an engine economical rotation speed control strategy dividing gears according to the calculated gear number is adopted, and when the engine is in a low gear, the optimal economical rotation speed Nx of the engine meeting the formula shown in the specifications; when the engine is in a high gear, the optimal economical rotation speed Nx of the engine meets the formula that Nx=N(GeMIN).

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a method for controlling the optimum economic speed of the engine for improving the fuel economy of the engine. Background technique [0002] The current continuous rise in oil prices has led to a sharp increase in the operating costs of the passenger transport industry. Therefore, fuel saving in passenger transport has become an inevitable trend in the development of the current passenger car industry. There are two main development directions for passenger car fuel saving. One is to develop energy-saving new energy vehicles. On the other hand, since the development of new energy vehicles is easily restricted by regions and supporting facilities, it is more effective to improve the fuel economy of traditional diesel buses. [0003] At present, the fuel consumption of passenger cars is relatively large. With the sharp increase of operating costs, passenger transport companies have realize...

Claims

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Application Information

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IPC IPC(8): F02D29/02
Inventor 陆军徐剑辉禇向涛陈涛徐凯毛永佳
Owner XIAMEN GOLDEN DRAGON BUS
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