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Control method of range extender engine without camshaft sensor in pure electric vehicle

A camshaft sensor, pure electric vehicle technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., to achieve the effect of saving system cost and simplifying design

Active Publication Date: 2017-04-05
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Hybrids can't achieve zero emissions within 50km

Method used

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  • Control method of range extender engine without camshaft sensor in pure electric vehicle
  • Control method of range extender engine without camshaft sensor in pure electric vehicle
  • Control method of range extender engine without camshaft sensor in pure electric vehicle

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Experimental program
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Embodiment Construction

[0019] The present invention provides a control method for a range extender engine of a pure electric vehicle without a camshaft sensor, which is to simulate a camshaft signal in the control of the engine, and its flow chart is as follows figure 1 As shown, the following steps are included:

[0020] (1) The range extender control unit issues a start command for the range extender, and the engine electronic control unit sets the initial voltage signal of the car camshaft as a high-level signal;

[0021] (2) Start the engine, stabilize the idle speed, collect the torque feedback value of the engine 1 cylinder through the generator, and set the torque value as positive torque;

[0022] (3) The engine control unit controls the injector 1 to work normally, and at the same time collects the torque feedback value F 1 and torque feedback value F 4 ; where: F 1 Torque feedback value for the set engine cylinder 1 to do work, F 4 It is the torque feedback value of intake air for the ...

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Abstract

The invention discloses a control method of a distance increasing equipment engine of a pure electric vehicle camshaft-free sensor. The camshaft position sensor of a traditional engine is omitted, the engine arranged on distance increasing equipment is used for torque detecting, a torque feedback value F1 and a torque feedback value F4 are judged, and the torque of the engine first cylinder working period and the torsion output of a first cylinder air inlet period are obtained. According to the method, the camshaft position sensor is not needed, and the upper stopping point of the first cylinder compression can be identified, so that the accurate synchronization of the engine and an engine control unit can be finished, and the fuel accurate order ejecting is realized. The system cost can be reduced, the engine design is simplified, and the economic and technological dual benefits are obtained.

Description

technical field [0001] The invention relates to a control method for a range extender engine in a new energy vehicle (that is, a pure electric vehicle), in particular to a control method for an engine in an even cylinder range extender system of a pure electric vehicle without a camshaft sensor. Background technique [0002] Today, when PM2.5 seriously affects human survival, under the dual pressure of emission regulations and fuel economy of traditional vehicles, people are also thinking about the depletion of non-renewable resources such as oil in the future. In the past ten years, automobile manufacturers around the world have launched electric vehicles one after another. Electric vehicles are generally divided into three categories: hybrid (HEV) / fuel cell (FCV) / battery battery (BEV). Among them, pure electric vehicles are limited by charging equipment and driving range. Hybrids cannot achieve zero emissions within a range of 50 km. Fuel cell technology requires large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D29/02
Inventor 李中兴王泽兴
Owner BEIJING ELECTRIC VEHICLE