Extended-range electric vehicle fuel consumption rate minimum control method

A fuel consumption rate, electric vehicle technology, applied in the direction of electric vehicles, motor vehicles, control devices, etc., can solve the problem that the engine only works near the optimal working line, not the optimal working line, etc.

Active Publication Date: 2017-11-21
广州新致信息科技有限公司
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Problems solved by technology

[0004] Chinese Patent Publication No. CN 103863087 B, announced on January 11, 2017, the title of the invention is an energy-saving predictive control method for plug-in hybrid electric vehicles based on the optimal working line of the engine. Next, use the established mathematical model and formulaic control strategy to solve the optimal control problem, and finally apply the first control quantity of the obtained optimal control sequence to the system to make the engine work near the optimal working line method, the disadvantage is that the engine only works near the optimal working line, not on the optimal working line

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[0013] Offline detection establishes the actual engine speed and follows the principle of minimum fuel consumption rate to control the relationship between the engine output torque and the speed under the current fuel injection condition and draw the mechanical characteristic curve 1. For a certain engine, the curve 1 remains unchanged. The method is as follows: According to the speed characteristic diagram of the internal combustion engine, the speed value and torque value at the minimum fuel consumption rate are obtained under different fuel injection quantities, and the speed value and torque value determine a point on a curve. When changing the fuel injection quantity, the curve can be obtained There are more different points on 1. When the engine speed exceeds the rated speed, the fuel injection quantity will no longer increase. By fitting these points to the curve, the functional relationship between the engine output torque and the speed under the minimum fuel consumption...

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Abstract

Aiming at the problem of minimum engine fuel consumption rate of an extended-range electric vehicle, an extended-range power generation system and a generator current change device are controlled to enable the output bus voltage to be stable, so that the actual rotating speed of an engine is changed along with the load change; and the actual rotating speed of the engine follows up the fuel consumption rate minimum principle to control real-time fuel injection quantity of the engine to realize electric energy needed by automatic system output and always minimum fuel consumption rate. The energy is saved; the emission is reduced; and the method is simple and feasible.

Description

technical field [0001] The invention relates to a method for controlling the minimum fuel consumption rate of an extended-range electric vehicle. Background technique [0002] Oil depletion and environmental pollution have become the most urgent problems facing the world's automobile industry and even all mankind. Compared with traditional fuel vehicles, the range extender's engine can be controlled in the optimal working state, and has a large emission capacity Compared with pure electric vehicles, the required battery capacity is much smaller, the cost is lower, and it will not break down due to power shortage. Extended-range electric vehicles are attracting more and more attention from governments around the world due to their huge advantages in energy saving and environmental protection. . [0003] Research on the APU control strategy of the extended-range electric vehicle, Automotive Engineering, 2013 (Volume 35) No. 9 discloses a method of using the generator to contr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/12B60W10/06B60W10/08B60K6/46B60L11/12B60L50/15
CPCB60K6/46B60L50/61B60W10/06B60W10/08B60W20/12B60W2510/0638B60W2510/081B60W2510/244B60W2520/28B60W2540/10B60W2540/16B60W2710/0605B60W2710/0677Y02T10/62Y02T10/70Y02T10/7072
Inventor 杜福银
Owner 广州新致信息科技有限公司
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