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Open-loop control method for cancelling engine induced noise and vibration

一种发动机、发动机速度的技术，应用在发动机控制、机器/发动机、电气控制等方向，能够解决复杂控制算法等问题

Inactive Publication Date: 2010-11-03
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Open-loop control is a cost-effective solution compared to closed-loop control, but requires more complex control algorithms

Method used

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  • Open-loop control method for cancelling engine induced noise and vibration
  • Open-loop control method for cancelling engine induced noise and vibration
  • Open-loop control method for cancelling engine induced noise and vibration

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Embodiment Construction

[0015] The following discussion of embodiments of the present invention relating to systems and methods for open-loop control of an active engine suspension utilizing only crankshaft pulses to reduce engine vibrations transmitted to the vehicle body structure is merely exemplary in nature and in no way intended to limit the invention or its application or use.

[0016] figure 1 is a schematic block diagram of a control system 10 that reduces or eliminates the transmission of engine vibrations from a vehicle engine 12 to a vehicle body structure 14 . Engine 12 is intended to represent any engine that transmits vibrations to a vehicle body structure, such as a four-cylinder engine, six-cylinder engine, eight-cylinder engine, diesel engine, or the like. In this non-limiting example, engine 12 is mounted to body structure 14 by two active engine suspensions 16 and 18 . The engine suspensions 16 and 18 are active in that they can be controlled to provide motion in a direction opp...

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Abstract

An open-loop control system that provides control signals to active engine mounts to reduce or eliminate the transfer of engine vibration to a vehicle body structure, where the system uses only a crank signal from the engine as an input. The control system includes an instant crank speed variation sensing processor that receives the crank signal from the engine, where the crank signal is a pulsedsignal including missing pulses as a result of teeth missing on the vehicle crank wheel. The crank speed variation sensing processor provides a measurement of the instant crank speed variation of thecrank signal and minimizes an error in the measurement as a result of the missing pulses. The crank speed variation sensing processor outputs a crank speed sensing variation signal as a sine wave that identifies order content in the crank pulse signal.

Description

technical field [0001] The present invention relates generally to a system and method for controlling engine vibration in a vehicle, and more particularly to a system and method for providing open-loop control of an active engine suspension based on engine crankshaft pulses to prevent transmission of engine vibration to the vehicle body structure. Background technique [0002] Active noise control and active vibration control are commonly used to reduce engine-induced noise and vibration in vehicles. Typically, active noise control uses speakers to attenuate engine noise whose frequency and phase are synchronized with the engine's crankshaft speed and angle. Active vibration control typically utilizes active actuators such as active engine suspensions to dampen engine-induced vibrations that are also frequency and phase synchronized to crankshaft speed. [0003] The magnitude of engine-induced noise and vibration is proportional to engine torque changes that are proportion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D35/02F02D41/02F02D41/04F02D45/00
CPCB60K5/1283
Inventor K-K·辛D·J·费尔布吕格
Owner GM GLOBAL TECH OPERATIONS LLC
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