Patent US4870828A successfully refreshed from Google Patents.
US4870828A
Expired / Lapsed
US
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Cooling system in motor vehicle
Assignee: Marelli Corp
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Filing: 1988-02-16
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Granted: 1989-10-03
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Expires: 2008-02-16
Abstract
Abstract Herein disclosed is a cooling system for use with an internal combustion engine which is operated on evaporable fuel supplied from a fuel tank. The cooling system comprises a tube extending from the fuel tank to a venturi throat portion of an air induction passage of the engine, an expansion valve connected to the tube and opening the tube when a pressure in the tube downstream of the valve is reduced to a certain degree, an evaporator device connected to the tube at a position downstream of the expansion valve, and a structure for defining an enclosed space about the evaporator device.
Inventors
- 👤 Yoshiaki Hidaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:40
CPC Classifications
F; F25; F25B; F25B19/00; B; B60; B60K; B60K15/00; F02; F02M; F02M17/00; F02M17/52; F02M53/00; F02M71/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
A cooling system for use with a fuel injected engine which is operated on evaporable fuel supplied from a fuel tank through a fuel supply line to at least one fuel injection valve, said cooling system comprising: a tube extending from said fuel tank to a given portion of an air induction part of the engine where a vacuum is produced under operation of the engine; said tube having a nozzle portion extending into an exterior of said given portion; an expansion valve connected to a part of said tube between said fuel tank and said nozzle portion, said expansion valve opening the tube when a pressure in the tube downstream of the valve is reduced to a certain degree; an evaporator device connected to said tube between said expansion valve and said nozzle portion; and means for defining an enclosed space about said evaporator device; a fuel return line to return a portion of the fuel to the fuel tank during operation of the engine; and a pressure regulator valve connecting the return line to the fuel supply line for controlling the amount of fuel supplied to the engine.
Claim 2
Dependent Claim
190 words
A cooling system for use with a fuel injected engine which is operated on evaporable fuel supplied from a fuel tank through a fuel supply line to at least one fuel injection valve, said cooling system comprising: a tube extending from said fuel tank to a given portion of an air induction part of the engine where a vacuum is produced under operation of the engine; said tube having a nozzle portion extending into an exterior of said given portion; an expansion valve connected to a part of said tube between said fuel tank and said nozzle portion, said expansion valve opening the tube when a pressure in the tube downstream of the valve is reduced to a certain degree; an evaporator device connected to said tube between said expansion valve and said nozzle portion; and means for defining an enclosed space about said evaporator device; a fuel return line to return a portion of the fuel to the fuel tank during operation of the engine; and a pressure regulator valve connecting the return line to the fuel supply line for controlling the amount of fuel supplied to the engine.
Claim 3
Dependent Claim
27 words
A cooling system as claimed in claim 1, in which said given portion is a venturi throat portion formed in said air induction part of the engine.
Claim 4
Dependent Claim
35 words
A cooling system as claimed in claim 2, in which an intake end of said tube is immersed in the fuel in the fuel tank and extends substantially to the bottom of said fuel tank.
Claim 5
Dependent Claim
38 words
A cooling system as claimed in claim 3, in which said means for defining an enclosed space is a cooler box which is mounted in a passenger room of a motor vehicle on which said engine is mounted.
Claim 6
Dependent Claim
29 words
A cooling system as claimed in claim 3, in which said enclosed space defining means is a box structure through which a part of said fuel supply line passes.
Claim 7
Dependent Claim
30 words
A cooling system as claimed in claim 5, in which said box structure is arranged outside of a passenger room of a motor vehicle on which said engine is mounted.
Claim 8
Dependent Claim
57 words
A cooling system as claimed in claim 3, in which said enclosed space defining means is a vessel structure of said evaporator device, in which an induction part of a tube extending to a carbon canister is spacedly received, and in which said induction part is exposed to a fuel vapor space defined in said fuel tank.
Claim 9
Dependent Claim
66 words
The cooling system according to claim 1, further comprising: a manifold portion which communicates with said air induction part of the engine and receives fuel from said fuel injection valve; and means for controlling the amount of fuel present in the manifold portion by monitoring the amount of fuel supplied by said nozzle portion and controlling the amount of fuel injected by said fuel injection valves.
Claim 10
Dependent Claim
51 words
The cooling system according to claim 1, further comprising: a manifold portion which communicates with said air induction part of the engine and receives fuel from said fuel injection valve; and means for controlling said pressure regulator valve to equalize the pressure in said fuel injection valve and said manifold portion.
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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) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |