System for preventing vibrations in a diesel engine

Details System for preventing vibrations in a diesel engine System for preventing vibrations in a diesel engine

2000-08-25

2001-09-04

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Vibration compensating device

Reexamination Certificate

active

06283079

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to automotive engines, and more particularly to a system for preventing vibrations occurring in a diesel engine during shut down.
2. Description of the Prior Art
Previously known systems for suppressing engine vibrations use torque output control techniques wherein torque fluctuations are detected at the engine crankshaft and a current is applied to an alternator to vary a reverse torque applied to the crankshaft.
Another known prior art technique is to sense the angular speed of the engine crankshaft and convert the speed into a current, compare it to a reference value and then selectively apply the current to a motor/generator connected to the crankshaft.
Still another technique for reducing engine vibration includes means for sensing the engine combustion pressure and varying the engine output torque when an improper combustion occurs.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a system for suppressing vibrations of an automotive engine.
Another object of the present invention is to provide a system to apply a positive and/or negative power to an engine to effect a smooth deceleration of the rotating parts of the engine.
A further object of the present invention is to provide a system wherein a combined starter/alternator apparatus is used to prevent vibrations occurring during shut down of a diesel engine.


REFERENCES:
patent: 4982707 (1991-01-01), Maeda et al.
patent: 5033425 (1991-07-01), Kadomukai et al.
patent: 5186136 (1993-02-01), Kadomukai et al.
patent: 5722359 (1998-03-01), Chubachi et al.
patent: 5730094 (1998-03-01), Morris

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