US5022367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine brake system of a two-cycle engine for a motor vehicle
Assignee: Subaru Corp
•
Filing: 1990-08-03
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Granted: 1991-06-11
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Expires: 2010-08-03
Abstract
Abstract A two-stroke engine has a scavenge pump provided in an intake passage. A valve is provided in the intake passage downstream of the scavenge pump. When deceleration of a vehicle is detected, the valve is operated to partially close the intake passage.
Inventors
- 👤 Koji Morikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:40
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/02; F02B; F02B33/00; F02B33/32; F02B33/34; F02B33/36; F02B33/38; F02B33/44; F02B33/446; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 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, and a scavenge pump provided in said intake passage and driven by a crankshaft of the engine for supplying intake air to the cylinder, the system comprising: an engine brake valve provided in said intake passage adjacent said scavenge pump; an actuator for operating said engine brake valve; detector means for detecting deceleration of the vehicle and for producing a deceleration signal; means responsive to the deceleration signal for operating said actuator for closing said engine brake valve so as to increase load on the engine.
Claim 2
Dependent Claim
116 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, and a scavenge pump provided in said intake passage and driven by a crankshaft of the engine for supplying intake air to the cylinder, the system comprising: an engine brake valve provided in said intake passage adjacent said scavenge pump; an actuator for operating said engine brake valve; detector means for detecting deceleration of the vehicle and for producing a deceleration signal; means responsive to the deceleration signal for operating said actuator for closing said engine brake valve so as to increase load on the engine.
Claim 3
Dependent Claim
30 words
The system according to claim 1, wherein the detector means produces said deceleration signal when deceleration of the vehicle is detected at a higher engine speed than a set speed.
Claim 4
Dependent Claim
30 words
The system according to claim 1, wherein said actuator has a diaphragm operated by a pressure applied to one side thereof from the intake passage adjacent said engine brake valve.
Claim 5
Dependent Claim
33 words
The system according to claim 3, wherein said actuator is arranged such that said diaphragm is kept at a position where said pressure balances with another pressure applied to the other side thereof.
Claim 6
Dependent Claim
18 words
The system according to claim 3, wherein said engine brake valve is disposed downstream of said scavenge pump.
Claim 7
Dependent Claim
18 words
The system according to claim 3, wherein said engine brake valve is disposed upstream of said scavenge pump.
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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) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |