US4442805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine provided with a plurality of power units
Assignee: Subaru Corp
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Filing: 1981-11-30
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Granted: 1984-04-17
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Expires: 2001-11-30
Abstract
Abstract An internal combustion engine comprising a primary engine unit and an auxiliary engine unit, in which the auxiliary engine unit is connected to an output shaft of the primary engine unit under conditions both engine units are balanced in output torque and engine speed.
Inventors
- 👤 Toru Yamakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:54
CPC Classifications
F; F02; F02B; F02B73/00; F02B75/00; F02B75/06; F02B75/065; F02D; F02D25/00; F02D25/04; F02D9/00; F02D9/08; F02D9/10; F02D9/109; F02M; F02M13/00; F02M13/02; F02M13/023; F02D9/02; F02D2009/0201; F02D2009/0249; F02D2009/0254; F02D2009/0257; F02D41/00; F02D41/02; F02D41/021; F02D41/0215; F02D41/022; Y; Y10; Y10S; Y10S123/00; Y10S123/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
An internal combustion engine for a vehicle, which comprises a plurality of independent engine units including a primary engine unit and an auxiliary engine unit, and an output shaft, characterized in that the primary engine is connected to the output shaft and the auxiliary engine unit is connected to the output shaft through a clutch, that a control system is so arranged that when a throttle valve of the primary engine unit is fully opened, a throttle valve of the auxiliary engine unit is opened to a half open position and the throttle valve of the primary engine unit is closed to a half open position, thereafter both throttle valves are opened together.
Claim 2
Dependent Claim
113 words
An internal combustion engine for a vehicle, which comprises a plurality of independent engine units including a primary engine unit and an auxiliary engine unit, and an output shaft, characterized in that the primary engine is connected to the output shaft and the auxiliary engine unit is connected to the output shaft through a clutch, that a control system is so arranged that when a throttle valve of the primary engine unit is fully opened, a throttle valve of the auxiliary engine unit is opened to a half open position and the throttle valve of the primary engine unit is closed to a half open position, thereafter both throttle valves are opened together.
References Cited (Backward Citations)
US1944256A
Cited
US2315183A
Cited
US2379288A
Cited
US2392933A
Cited
US2623617A
Cited
US4019479A
Cited
US4070994A
Cited
US4257371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |