Method and device for recovering engine power under altitude environment

A technology of engine power and plateau environment, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problem of low engine power recovery ability, and achieve the effect of enhancing power recovery ability, improving power recovery ability, and improving fuel efficiency

Inactive Publication Date: 2013-11-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Embodiments of the present invention provide a method and device for recovering engine power in a plateau envir

Method used

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  • Method and device for recovering engine power under altitude environment
  • Method and device for recovering engine power under altitude environment
  • Method and device for recovering engine power under altitude environment

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Embodiment 1

[0060] According to atmospheric physics, as altitude increases, atmospheric pressure and density decrease. For example, at an altitude of 4500m, the atmospheric pressure is about 59kPa, and the density is about 0.84kg / m 3 . Generally, the following situations will occur in the plateau environment: the engine combustion air is insufficient, the fuel cannot be fully burned, the engine performance deteriorates, and the output power decreases. In addition, too rich combustible mixture will cause the temperature of the turbine inlet to rise, which threatens the reliability of the turbine. In addition, the exhaust back pressure of the turbine is low in the plateau environment, and the energy of the turbine inlet gas is excessive, which is easy to cause turbocharger damage. In case of overspeed damage. Therefore, in the plateau environment, the fuel supply of the engine is generally reduced to ensure the reliable operation of the turbine. However, after reducing the fuel supply, t...

Embodiment 2

[0136] refer to Figure 5 , shows a structural block diagram of a device for recovering engine power in a plateau environment in Embodiment 2 of the present invention, the device may include: a calculation module 501, a first determination module 502, a second determination module 503, and a third determination module 504 and setting module 505.

[0137] in:

[0138] The calculation module 501 is used to calculate the initial fuel supply amount at the preset engine speed according to the preset engine air-fuel ratio and the initial fuel supply advance angle.

[0139] The first determining module 502 is configured to gradually increase the initial fuel supply amount, and determine an intermediate fuel supply amount at the preset engine speed.

[0140] The first determining module 502 may include:

[0141] The first increasing sub-module is used to gradually increase the fuel supply with the initial fuel supply as the initial value and the first step as the adjustment step; ...

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Abstract

The embodiment of the invention provides a method and device for recovering engine power under an altitude environment. The method comprises the following steps: according to a preset engine air-fuel ratio and an initial fuel supply advance angle, computing initial fuel supply at preset engine speed; gradually increasing the initial fuel supply, and determining intermediate fuel supply at the preset engine speed; gradually increasing the initial fuel supply advance angle, and determining optimal fuel supply at the preset engine speed; when the rotation speed of an engine is the preset engine speed, setting the fuel supply advance angle of the engine as the optimal fuel supply advance angle, setting the fuel supply of the engine as the optimal fuel supply, and recovering the engine power. With adoption of the method and the device, provided by the embodiment of the invention, the power recovering capability of the engine under the altitude environment is enhanced through united adjustment of the fuel supply advance angle and the fuel supply on the premise of not changing the structure of the engine and not adding accessories.

Description

technical field [0001] The embodiments of the present invention relate to the field of engine technology, in particular to a method and device for recovering engine power in a plateau environment. Background technique [0002] According to atmospheric physics, as altitude increases, atmospheric pressure and density decrease. For example, at an altitude of 4500m, the atmospheric pressure is about 59kPa, and the density is about 0.84kg / m 3 . Generally, the following situations will occur in the plateau environment: the engine combustion air is insufficient, the fuel cannot be fully burned, the engine performance deteriorates, and the output power decreases. In addition, too rich combustible mixture will cause the temperature of the turbine inlet to rise, which threatens the reliability of the turbine. In addition, the exhaust back pressure of the turbine is low in the plateau environment, and the energy of the turbine inlet gas is excessive, which is easy to cause turbocharg...

Claims

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Application Information

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IPC IPC(8): F02D41/00
Inventor 张付军朱振夏韩恺柴智刚刘杨杨
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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