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Method for protecting dual mass flywheel, by detecting that it is entering into resonance when engine is running

一种双质量飞轮、发动机的技术，应用在发动机控制、机器/发动机、机械设备等方向，能够解决摆脱共振等问题，达到容易实施、小成本的效果

Active Publication Date: 2019-12-06
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is impossible to get out of resonance by accelerating

Method used

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  • Method for protecting dual mass flywheel, by detecting that it is entering into resonance when engine is running
  • Method for protecting dual mass flywheel, by detecting that it is entering into resonance when engine is running
  • Method for protecting dual mass flywheel, by detecting that it is entering into resonance when engine is running

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Embodiment Construction

[0044] figure 1 The graph in , shows the evolution of the curve of the crankshaft speed Vvil or the engine speed of the vehicle measured over time, for example as the vehicle is driven with a multi-cylinder combustion engine. The axis of abscissa has a scale of time t in seconds (s), and the axis of ordinate has a scale of engine speed V or crankshaft rotational speed in revolutions per minute (tr / mn). Here, the idle speed is represented by a horizontal line limited to 800 tr / mn by an engine control unit (not shown) in a predetermined manner.

[0045] exist figure 1 In the given example of the engine, over time, the crankshaft speed shown by the curve Vvil changes from a rotational speed of about 2000 tr / mn in a period of about half a second (corresponding to half the length of the axis of abscissa shown). This changes to an average speed of about 500 to 600 tr / mn, representing for example a reduction in the engine speed in a sudden stop phase or in a low speed region where ...

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Abstract

A method for protecting a dual mass flywheel DMF, by detecting, when the engine in running, that the DMF is entering into resonance, the DMF being arranged between an internal combustion engine and agearbox of a vehicle, comprising the following steps: determining the average rotational speed (Vvilmoy) of the crankshaft over time, over a predetermined given period, as a first parameter constituting a risk of the DMF entering into resonance, measuring the maximum instantaneous rotational speed and the minimum instantaneous rotational speed of the crankshaft, the difference defining the maximumamplitude (Ampwn) of the rotational oscillations of the crankshaft, over the period, as a second parameter constituting a risk of the DMF entering into resonance, detecting when the DMF is entering into resonance from a determined combination of values of the first and second parameters over the period, limiting or cutting off the fuel injection in the cylinders after said detection.

Description

technical field [0001] The present invention relates to a method and a device for protecting a dual mass flywheel disposed between an internal combustion engine and a gearbox of a vehicle by detecting that the flywheel goes into resonance when the engine is running. Background technique [0002] A Dual Mass Flywheel DVA (or "Dual Mass Flywheel" in English, DMF) is a flywheel consisting of two distinct parts, the first part is connected to the engine and the second part is connected to the vehicle's gearbox via a drive shaft. The two parts are free to rotate relative to each other, and this rotational freedom is limited by a spring disposed between the two parts. The springs lessen the influence of each other, and more specifically, jolts in the transmission or variations in combustion engine speed caused by engine torque produced by multiple cylinders. Due to the presence of the springs, this dual mass flywheel design introduces resonant frequencies that can cause undamped ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/20F02D41/00F02D41/02
CPCB60W30/20F02D41/0097F02D41/021F02D2200/101B60W2030/206B60W2710/0616F02D41/22F02D41/34F02D2250/28F16F15/1414
Inventor J.勒菲威尔B.马可纳托
Owner VTESCO TECH GMBH
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