A Method for Determining the Output Oil Quantity of Electronically Controlled Diesel Engine under Abnormal Condition

An abnormal condition, diesel engine technology, applied in electrical control, mechanical equipment, engine control, etc., can solve problems such as oil volume adjustment, improve power and economy, and prevent major failures.

Inactive Publication Date: 2016-07-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for determining the output oil volume of an electronically controlled diesel engine under abnormal conditions, thereby overcoming the defect that the prior art cannot adjust the oil volume after comprehensively considering all possible failure causes

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  • A Method for Determining the Output Oil Quantity of Electronically Controlled Diesel Engine under Abnormal Condition
  • A Method for Determining the Output Oil Quantity of Electronically Controlled Diesel Engine under Abnormal Condition
  • A Method for Determining the Output Oil Quantity of Electronically Controlled Diesel Engine under Abnormal Condition

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[0018] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0019] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0020] figure 1 A block diagram of the computational method of the present invention is shown. Firstly, use the controller software of the diesel engine to judge which working condition the diesel engine is in (starting condition, idling condition, normal working condition and shutdown condition) according to the speed, and then calculate the external characteristic limit oil quantity and limit air-fuel ratio at this speed...

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Abstract

The invention discloses a method for determining the output oil volume of an electronically controlled diesel engine under abnormal conditions. The method includes: obtaining the corrected limited oil volume, which includes the following steps: calculating the external characteristic limited oil volume and the limit air-fuel ratio limited oil volume; Calculating a first fuel quantity limiting coefficient according to one or more abnormal conditions; calculating a modified external characteristic limiting fuel quantity; calculating a second fuel quantity limiting coefficient; calculating a corrected limit air-fuel ratio limiting fuel quantity; The smaller value of the limited oil quantity of external characteristics and the modified limit air-fuel ratio limited oil quantity is used as the revised limited oil quantity; the basic cycle oil quantity is calculated; the comparison between the corrected limited oil quantity and the basic cycle oil quantity is obtained The small value is used as the actual output circulating oil volume; and the actual output circulating oil volume is used to adjust the fuel injection of the electronically controlled diesel engine. This method enables automatic repair of the diesel engine, avoiding major failures.

Description

technical field [0001] The invention relates to the field of diesel engines, in particular to a method for determining the output oil volume of an electronically controlled diesel engine under abnormal conditions. Background technique [0002] The diesel engine is the power source of the vehicle, and its working performance, safety and reliability will directly affect the safe operation of the vehicle. Therefore, in addition to good performance control, a series of fault detection and protection should be carried out on the diesel engine to avoid serious accidents. accident. The protection of the electronically controlled diesel engine is generally realized by the real-time control of the fuel injection quantity of the diesel engine by the ECU. During the operation of the electronically controlled diesel engine, for some reasons, the engine oil pressure is too low, the oil temperature is too high, the cooling water temperature is too high, the cooling water temperature is t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/04F02D41/22F02D41/30
Inventor 董天普张付军迟兆昱崔涛刘波澜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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