US4922869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque controlling apparatus for internal combustion engine
Assignee: Hitachi Ltd
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Filing: 1989-04-17
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Granted: 1990-05-08
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Expires: 2009-04-17
Abstract
Abstract A torque controlling apparatus for an internal combustion engine comprises an electric machinery for absorbing torque from the internal combustion engine and/or for imparting torque to the internal combustion engine; a memory unit for storing, in advance, waveform characteristics of torque deviation generated by the engine in the respective operative conditions of the engine; a detector for detecting an operative condition of the engine; and a control unit. The control unit reads out the waveform characteristics of torque deviation, from the memory unit, corresponding to the detected operative conditions of the engine detected by the detector. The control unit controls the electric machinery to generate countertorque on the basis of the read-out waveform characteristics to cancel the torque deviation.
Inventors
- 👤 Yuzo Kadomukai
- 👤 Makoto Yamakado
- 👤 Yozo Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:24
CPC Classifications
F; F02; F02D; F02D43/00; G; G05; G05D; G05D17/00; G05D17/02; F02D41/00; F02D41/02; F02D41/14; F02D41/1497; F02D45/00; H; H02; H02P; H02P29/00; H02P29/0016
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
138 words
A torque controlling apparatus for an internal combustion engine, comprising: an electric machinery for absorbing torque from said internal combustion engine and/or for imparting torque to said internal combustion engine; memory means for storing, in advance, waveform characteristics of torque deviation generated by said internal combustion engine in the respective operative conditions of said internal combustion engine; detecting means for detecting an operative condition of said internal combustion engine; and controlling means for reading out said waveform characteristics of torque deviations from said memory means in correspondence with the detected operative condition of said internal combustion engine detected by said detecting means, and for controlling said electric machinery on the basis of the read-out waveform characteristics to absorb torque from said internal combustion engine and/or impart torque to said internal combustion engine, thereby reducing said deviation of torque.
Claim 2
Dependent Claim
138 words
A torque controlling apparatus for an internal combustion engine, comprising: an electric machinery for absorbing torque from said internal combustion engine and/or for imparting torque to said internal combustion engine; memory means for storing, in advance, waveform characteristics of torque deviation generated by said internal combustion engine in the respective operative conditions of said internal combustion engine; detecting means for detecting an operative condition of said internal combustion engine; and controlling means for reading out said waveform characteristics of torque deviations from said memory means in correspondence with the detected operative condition of said internal combustion engine detected by said detecting means, and for controlling said electric machinery on the basis of the read-out waveform characteristics to absorb torque from said internal combustion engine and/or impart torque to said internal combustion engine, thereby reducing said deviation of torque.
Claim 3
Dependent Claim
38 words
A torque controlling apparatus according to claim 1, wherein said electric machinery includes a motor-generator, and said controlling means controls said motor-generator on the basis of the read-out waveform characteristics to generate countertorque to cancel said torque deviation.
Claim 4
Dependent Claim
26 words
A torque controlling apparatus according to claim 1, wherein said electric machinery includes an electric load means for exclusively absorbing torque from said internal combustion engine.
Claim 5
Dependent Claim
25 words
A torque controlling apparatus according to claim 1, wherein said electric machinery includes an electric motor for exclusively imparting torque to said internal combustion engine.
Claim 6
Dependent Claim
28 words
A torque controlling apparatus according to claim 3, said electric load means includes an electric generator provided on a vehicle on which said internal combustion engine is mounted.
Claim 7
Dependent Claim
25 words
A torque controlling apparatus according to claim 1, wherein said waveform characteristics of the deviation of torque stored in said memory means are wave patterns.
Claim 8
Dependent Claim
35 words
A torque controlling apparatus according to claim 1, wherein said waveform characteristics of the deviation of torque stored in said memory means are a function representative of wave patterns and a group of coefficients therefor.
Claim 9
Dependent Claim
52 words
A torque controlling apparatus according to claim 6, wherein said wave pattern is selected from the group consisting of a sine wave and a rectangular wave which have a period, a value of which is obtained by dividing one combustion cycle of said internal combustion engine by the number of cylinders thereof.
Claim 10
Dependent Claim
61 words
A torque controlling apparatus according to claim 6, wherein said detecting means includes means for detecting an amount of mixture gas to flow into said internal combustion engine and means for detecting mean rotating speed of said internal combustion engine, thereby determining said operative condition on the basis of said detected amount of mixture gas and said detected mean rotating speed.
Claim 11
Dependent Claim
20 words
A torque controlling apparatus according to claim 1, wherein said electric machinery is integrally mounted on said internal combustion engine.
Claim 12
Dependent Claim
56 words
A torque controlling apparatus according to claim 1, wherein said electric machinery includes an electric generator and an electric motor that are separated from each other, and wherein said controlling means independently controls said electric generator and said electric motor on the basis of said read-out waveform characteristics to generate countertorque to cancel said torque deviation.
Claim 13
Dependent Claim
84 words
A torque controlling apparatus according to claim 1, wherein said electric machinery includes an electric generator and an electric motor that are separated from each other, and wherein said controlling means controls said electric generator to absorb large torque from said internal combustion engine when torque deviation is positive, controls said electric generator to absorb small torque from said internal combustion engine when torque deviation is negative, and controls said electric motor to generate constant torque to impart it to said internal combustion engine.
Claim 14
Dependent Claim
81 words
A torque controlling apparatus according to claim 1, wherein said electric machinery includes an electric generator and an electric motor that are separated from each other, and wherein said controlling means controls said electric motor to impart small torque to said internal combustion engine when torque deviation is positive, controls said electric motor to impart large torque to said internal combustion engine when torque deviation is negative, and controls said electric generator to absorb constant torque from said internal combustion engine.
Claim 15
Dependent Claim
25 words
A torque controlling apparatus according to claim 12, wherein said constant torque imparted to said internal combustion engine by said electric motor is zero torque.
Claim 16
Dependent Claim
25 words
A torque controlling apparatus according to claim 13, wherein said constant torque absorbed from said internal combustion engine by said electric generator is zero torque.
Claim 17
Dependent Claim
74 words
A torque controlling apparatus according to claim 1, wherein said electric machinery includes an electric generator and a DC motor that are separated from each other, and said controlling means controls said electric generator to absorb large torque from said internal combustion engine when torque deviation is positive, controls said electric generator to absorb small torque from said internal combustion engine when torque deviation is negative, and drives said DC motor with constant voltage.
References Cited (Backward Citations)
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DE3230607A1
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |