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Method and device for actively inhibiting torsional vibration of engine crankshaft

An active suppression, engine technology, applied in the direction of engine control, machine/engine, electrical control, etc., to achieve the effect of smooth and reliable operation

Inactive Publication Date: 2012-05-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method only starts from the perspective of correcting the cycle fuel injection quantity, and does not involve the factors of fuel injection timing

Method used

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  • Method and device for actively inhibiting torsional vibration of engine crankshaft
  • Method and device for actively inhibiting torsional vibration of engine crankshaft
  • Method and device for actively inhibiting torsional vibration of engine crankshaft

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Embodiment Construction

[0063] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0064] Such as figure 1 As shown, the present invention provides a kind of method that actively suppresses engine crankshaft torsional vibration, comprises:

[0065] Step 101. Detect the instantaneous rotational speed of the crankshaft, and convert the obtained instantaneous rotational speed signal of the crankshaft into a corresponding square wave signal;

[0066] Step 102. Calculate the resonance harmonic torsion angle and corresponding rotational speed of the crankshaft resonance point according to the obtained square wave signal;

[0067] Step 103. According to the obtained resonance harmonic torsion angle and corresponding rotational speed of the resonance poi...

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Abstract

The invention discloses a method and device for actively inhibiting torsional vibration of an engine crankshaft. The method comprises the following steps of: firstly detecting the transient speed of the crankshaft, calculating a corresponding square signal according to an obtained crankshaft transient speed signal, and further calculating the resonance order torsional angle of a resonance point of the crankshaft and the corresponding speed; and calculating a fuel injection vector for inhibiting the resonance point according to the natural frequency and vibration mode of the crankshaft as well as the resonance order torsional angle of the resonance point of the crankshaft and the corresponding speed, and outputting a control signal to the fuel injector solenoid valve by virtue of a driving circuit so as to control a fuel injector. The method and device for actively inhibiting torsional vibration of the engine crankshaft have the beneficial effect that the real-time closed control on torsional vibration of the crankshaft can be realized through adjusting the circulation fuel injection amount and injection time of each cylinder of a diesel engine, thereby ensuring the steady and reliable running of the engine crankshaft.

Description

technical field [0001] The invention relates to the field of engine technology, in particular to a method and device for actively suppressing torsional vibration of an engine crankshaft. Background technique [0002] Torsional vibration is the main fatigue damage factor of engine crankshaft, and the mechanism research of torsional vibration is an important subject of engine dynamics research. important meaning. [0003] Torsional vibration control can be divided into three categories according to its control methods: passive control, semi-active control and active control. [0004] Passive control of torsional vibration moves the critical speed of torsional vibration out of the engine operating speed range by changing the inherent dynamic characteristics of the crankshaft shafting, or absorbs the excitation energy through damping materials. There are many methods for passive control of the crankshaft, among which installing a shock absorber at the free end of the crankshaf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/04F02D41/30
Inventor 黄英张付军左哲杨守平凌强杨永光
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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