Patent US4941441A successfully refreshed from Google Patents.
US4941441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine brake system of a two-cycle engine for a motor vehicle
Assignee: Subaru Corp
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Filing: 1989-08-18
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Granted: 1990-07-17
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Expires: 2009-08-18
Abstract
Abstract A two-stroke engine has a scavenge pump provided in an intake passage, a bypass around the scavenge pump and a fuel injector provided for injecting fuel in a cylinder of the engine. A valve is provided in the bypass so as to close the bypass. When deceleration of a vehicle is detected, the valve is closed and the fuel injection from the fuel injector is stopped.
Inventors
- 👤 Hideo Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:26
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02D31/00; F02D31/001; F02D31/002; F02D31/003; F02D31/005; F02D41/02; F02D41/04; F02D41/12; F02D41/123; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2275/00; F02B2275/14; F02D11/00; F02D11/06; F02D11/10; F02D2011/101; F02D2011/102; F02D2200/00; F02D2200/50; F02D2200/501; F02D2400/00; F02D2400/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
An engine brake system of a two-cycle engine for a motor vehicle, the engine having at least one cylinder, a scavenge port, an intake passage communicated with said scavenge port, a fuel injector provided for injecting fuel in the cylinder, a scavenge pump provided in said intake passage for supplying intake air to the cylinder and a bypass provided around the scavenge pump, the system comprising: detector means for detecting deceleration of the vehicle and for producing deceleration signal; a valve provided in the bypass so as to close the bypass; means responsive to the deceleration signal for closing the valve and for stopping fuel injection from the fuel injector.
Claim 2
Dependent Claim
110 words
An engine brake system of a two-cycle engine for a motor vehicle, the engine having at least one cylinder, a scavenge port, an intake passage communicated with said scavenge port, a fuel injector provided for injecting fuel in the cylinder, a scavenge pump provided in said intake passage for supplying intake air to the cylinder and a bypass provided around the scavenge pump, the system comprising: detector means for detecting deceleration of the vehicle and for producing deceleration signal; a valve provided in the bypass so as to close the bypass; means responsive to the deceleration signal for closing the valve and for stopping fuel injection from the fuel injector.
Claim 3
Dependent Claim
16 words
The system according to claim 1 wherein: the detector means detects engine speed and vehicle speed.
Claim 4
Dependent Claim
30 words
The system according to claim 1 further comprising an auxiliary valve provided in the intake passage for closing the intake passage in response to the engine speed and deceleration signal.
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) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |