Patent US5033425A successfully refreshed from Google Patents.
US5033425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine equipped with a torque controller
Assignee: Hitachi Ltd
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Filing: 1989-12-06
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Granted: 1991-07-23
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Expires: 2009-12-06
Abstract
Abstract To substantially prevent vibrations from arising due to a torque fluctuation of an internal combustion engine, a torque fluctuation of the internal combustion engine is detected, and a torque to be absorbed or generated by a motor generator is controlled so as to decrease the fluctuation torque according to a fluctuation torque information of at least one previous engine cycle.
Inventors
- 👤 Yuzo Kadomukai
- 👤 Yozo Nakamura
- 👤 Mitsuru Nakamura
- 👤 Naoki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:26
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1497; F02D41/1498; B; B60; B60W; B60W30/00; B60W30/18; B60W30/20; F02B; F02B75/00; F02B75/06; F02D29/00; F02D29/06; F02D2200/00; F02D2200/02; F02D2200/10; F02D2200/1002; F02D2250/00; F02D2250/18; F02D2250/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
186 words
An internal combustion engine comprising: a main transmission means; at least one accessory means in the form of a motor generator means adapted to function as one of a motor and a generator; an accessory drive transmission means for driving said at least one accessory means; a load torque controller means, including detection means for detecting a rotational speed variation at each crank angle of the internal combustion engine, for outputting a generator motor function change signal for causing said motor generator means to function as one of said motor and said generator, said rotational speed variation being a differential between an average torque generated by the internal combustion engine over an engine cycle of said internal combustion engine and an instantaneous torque generated by said internal combustion engine at said each crank angle; and control means, responsive to said generator motor function change signal and said rotational speed variation detected by said detection means, for controlling a torque to be one of generated and absorbed by said motor generator means to decrease the rotational speed variation of the internal combustion engine at each crank angle.
Claim 2
Dependent Claim
186 words
An internal combustion engine comprising: a main transmission means; at least one accessory means in the form of a motor generator means adapted to function as one of a motor and a generator; an accessory drive transmission means for driving said at least one accessory means; a load torque controller means, including detection means for detecting a rotational speed variation at each crank angle of the internal combustion engine, for outputting a generator motor function change signal for causing said motor generator means to function as one of said motor and said generator, said rotational speed variation being a differential between an average torque generated by the internal combustion engine over an engine cycle of said internal combustion engine and an instantaneous torque generated by said internal combustion engine at said each crank angle; and control means, responsive to said generator motor function change signal and said rotational speed variation detected by said detection means, for controlling a torque to be one of generated and absorbed by said motor generator means to decrease the rotational speed variation of the internal combustion engine at each crank angle.
Claim 3
Dependent Claim
53 words
The internal combustion engine according to claim 1, wherein the motor generator means is operated as a generator to absorb a torque when the engine speed is greater than an average engine speed, and operated as a motor to generate a torque when the engine speed is smaller than an average engine speed.
Claim 4
Dependent Claim
123 words
The internal combustion engine according to claim 1, wherein the motor generator means is operated as a generator and an output current is simultaneously increased to increase an absorption torque when an engine speed is greater than an average engine speed and is increasing and said output current is simultaneously decreased to decrease the absorption torque when the engine speed is less than an average engine speed and is decreasing, and wherein when the motor generator means is operated as a motor a field current is simultaneously increased to increase a generated torque when the engine speed is smaller than an average engine speed and decreasing, and the field current is decreased to decrease the generated torque when the engine speed is increasing.
Claim 5
Dependent Claim
52 words
The internal combustion engine according to one of claim 1, 2 or 3, further comprising a condenser means for storing an output current of a generator when the motor generator means operates as a generator and for feeding a field current of a motor when said generator means operates as a motor.
Claim 6
Dependent Claim
188 words
An internal combustion engine equipped with a load torque controller, comprising: a motor generator means driven by the internal combustion engine and operable as a motor and a generator; and a control means for controlling a torque generated or absorbed by the motor generator means, said control means comprising a detecting means for detecting each rotation angle of a crank shaft of said internal combustion engine, a detecting means for detecting a rotational speed variation whereby a torque fluctuation generated by the internal combustion engine is obtainable as a difference between an actual engine speed at each crank angle of the internal combustion engine and an average rotational speed in one engine cycle, a function change means for changing said motor generator means to a motor and a generator according to detected rotational speed variation information in at least one preceding engine cycle, and wherein said function change means operates said motor generator means as a generator when said engine speed is greater than the average engine speed but operates the motor generator means as a motor when the engine speed is smaller than the average engine speed.
Claim 7
Dependent Claim
188 words
An internal combustion engine equipped with a load torque controller, comprising: a motor generator means driven by the internal combustion engine and operable as a motor and a generator; and a control means for controlling a torque generated or absorbed by the motor generator means, said control means comprising a detecting means for detecting each rotation angle of a crank shaft of said internal combustion engine, a detecting means for detecting a rotational speed variation whereby a torque fluctuation generated by the internal combustion engine is obtainable as a difference between an actual engine speed at each crank angle of the internal combustion engine and an average rotational speed in one engine cycle, a function change means for changing said motor generator means to a motor and a generator according to detected rotational speed variation information in at least one preceding engine cycle, and wherein said function change means operates said motor generator means as a generator when said engine speed is greater than the average engine speed but operates the motor generator means as a motor when the engine speed is smaller than the average engine speed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |