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A compensation method for a natural gas engine plateau power compensation device

A power compensation and engine technology, which is applied to gaseous engine fuel, engine components, combustion engines, etc., can solve problems such as large user complaints and natural gas engine power drop, and achieve the effect of avoiding power drop

Active Publication Date: 2019-12-10
DONGFENG COMML VEHICLE CO LTD
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Problems solved by technology

[0004] The present invention aims at the existing problems that the natural gas engine power drops significantly in plateau areas, which makes users complain more, and provides a plateau power compensation device and compensation method for natural gas engines

Method used

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  • A compensation method for a natural gas engine plateau power compensation device

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] see figure 1 A plateau power compensation device for a natural gas engine comprises an atmospheric pressure measurement module, an engine speed measurement module, an engine load measurement module and a plateau power compensation module arranged on a vehicle. The atmospheric pressure measurement module is used to measure atmospheric pressure, the engine speed measurement module is used to measure engine speed, and the engine load measurement module is used to measure engine load; the atmospheric pressure measurement module, engine speed measurement The module and the engine load measurement module are respectively connected with the plateau power compensation module.

[0016] see figure 1 , a natural gas engine plateau power compensation method specifically includes the following steps:

[0017] Step 1, the atmospheric pres...

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Abstract

The invention provides a plateau power compensation device and method of a natural gas engine. The plateau power compensation device comprises an atmosphere pressure measurement module, an engine rotating speed measurement module, an engine load measurement module and a plateau power compensation module which are arranged on a vehicle. The plateau power compensation method comprises the followingsteps: 1, acquiring an excess air coefficient plateau correction factor MAP1; 2, acquiring an excess air coefficient plateau correction factor MAP2; 3, acquiring a plain target excess air coefficientMAP; and 4, multiplying the excess air coefficient plateau correction factor 1 by the excess air coefficient plateau correction factor 2 and then multiplying by the plain target excess air coefficientunder the current rotating speed and load conditions so as to acquire an appropriate plateau correction target excess air coefficient at different altitudes and under the different engine working conditions on a plateau, and serving the plateau correction target excess air coefficient as the input for gas injection. By adoption of the plateau power compensation device and compensation method, thecorrection of a target excess air coefficient can be achieved when the vehicles runs on the plateau, and then the power reduction caused by a thin atmosphere can be avoided.

Description

technical field [0001] The invention relates to a natural gas engine power compensation method, more specifically to a natural gas engine plateau power compensation device and compensation method, belonging to the technical field of engine performance control. Background technique [0002] At present, as the altitude rises, the air becomes thinner and thinner, and the lack of air volume will cause the engine to be unable to exert its power level on the plain; even on an engine with a supercharger installed, in order to protect the supercharger from overspeeding , not overheating, and will artificially limit its power, therefore, lack of plateau power is a problem often encountered by engines. [0003] Especially for lean-burn natural gas engines, lean combustion itself requires more air volume. Since the gas volume is determined according to the actual air volume entering the cylinder and the target excess air coefficient, if the supercharging engine is used on a plateau If...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00
CPCF02B43/02F02B43/10F02B2043/103F02D29/02F02D41/30F02D2200/101F02D2200/703Y02T10/30
Inventor 姜江许振营程伟
Owner DONGFENG COMML VEHICLE CO LTD
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