Method and device for improving torque and engine

A technology of engine and working conditions, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problem of engine torque reduction, etc., to achieve the effect of increasing torque, speeding up, and improving combustion efficiency

Active Publication Date: 2019-01-29
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems in the prior art, this application provides a method, device and engine for increasing torque, which can sol

Method used

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  • Method and device for improving torque and engine
  • Method and device for improving torque and engine
  • Method and device for improving torque and engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] see figure 1 , which is a flow chart of an implementation of the method for increasing torque provided in the embodiment of the present application.

[0061] The method for boosting torque provided by the embodiments of the present application includes:

[0062] S101: Determine the humidity increase of the gas in the intake manifold.

[0063] Since the humidity of the gas in the intake manifold determines the humidity of the gas in the cylinder, when the humidity of the gas in the intake manifold increases, it will lead to an increase in the humidity of the gas in the cylinder, and the torque of the engine will be affected by the humidity in the cylinder. oversized and lowered.

[0064] S102: Determine whether the engine is in an external characteristic condition; if yes, execute S103; if not, execute S104.

[0065] Wherein, the external characteristic working condition is a working condition that the accelerator opening reaches 100% and the throttle opening reaches ...

Embodiment approach

[0092] As yet another implementation manner, S103 may specifically be:

[0093] S1031: Increase the center of gravity of the heat release rate by a first preset value.

[0094] S1032: Decrease the opening of the exhaust gas recirculation EGR valve by a first preset ratio.

[0095] In this embodiment, not only the problem caused by the increase of humidity is solved by raising the center of gravity of the heat release rate, but also the problem caused by the increase of humidity is solved by reducing the opening degree of the EGR valve. Therefore, this embodiment can increase the torque of the engine faster, so as to solve the problem of engine torque reduction caused by the increase of intake air humidity in a short time, so that the power of the engine can quickly reach the engine power under the standard state.

[0096] It should be noted that, in this embodiment, the execution order of S1031 and S1032 is not fixed, S1031 can be executed first, and then S1032 can be execute...

Embodiment 2

[0137] Embodiment 2 is an improvement made on the basis of Embodiment 1. For the sake of brevity, the parts of Embodiment 2 that are the same as Embodiment 1 will not be repeated here.

[0138] see Figure 5 , which is a flow chart of another implementation of the method for increasing torque provided in the embodiment of the present application.

[0139] The method for boosting torque provided by the embodiments of the present application includes:

[0140] S501: Collect the humidity parameters of the gas in the intake manifold.

[0141] The humidity parameter can be used to judge whether the humidity in the intake manifold increases.

[0142] As an implementation manner, S501 may specifically be: using a humidity sensor to collect a humidity parameter of the gas in the intake manifold.

[0143] It should be noted that the installation position of the humidity sensor is uncertain. For example, the humidity sensor can be installed at the air inlet of the supercharger compr...

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PUM

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Abstract

The invention discloses a method and device for improving torque and an engine. When the humidity is increased, if the engine is in an external characteristic work condition, due to the fact that thegravity center of the heat release rate is properly improved, the combustion speed is increased, the flame spreading stability is improved, the combustion efficiency is improved, and the torque of theengine is improved; and due to the fact that the valve opening degree of EGR is properly reduced, waste gas guided into an air cylinder is reduced, fresh air and gas entering the air cylinder are increased, and the torque of the engine is improved. If the engine is not in the external characteristic work condition, the opening degree of a throttle valve is properly increased, the gas mass entering the air cylinder is increased, the fresh air and gas guided into the air cylinder are increased, and the torque of the engine is improved. In addition, whether the engine is in the external characteristic work condition or not, a waste gas bypass valve of a supercharger is activated according to a pulse width modulation signal, the gas mass entering the air cylinder is increased, the fresh air and gas guided into the air cylinder are increased, and the torque of the engine is improved.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a method, device and engine for boosting torque. Background technique [0002] With the popularization of vehicles, in order to cope with the problem of decreasing energy sources and increasing environmental pollution, gas engines have gradually attracted attention. Due to abundant gas resources and less air pollution after gas combustion, gas engines have become a hotspot in vehicle technology research. [0003] In the prior art, gas engines can adopt equivalent combustion, wherein, equivalent combustion refers to: when the fuel is burned in the air, the oxygen contained in a certain mass of air is just enough to completely burn a certain mass of fuel, that is, the carbon All carbon and hydrogen in hydrogen fuel are completely oxidized to carbon dioxide and water. [0004] Moreover, in order to dilute the combustible mixture, reduce the maximum combustion temperatur...

Claims

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Application Information

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IPC IPC(8): F02D43/00
CPCF02D43/00
Inventor 印志强刘翀张军张竞菲江楠王文霞
Owner WEICHAI POWER CO LTD
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