EP0247697A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Spray valve for a combustion engine
Assignee: Texas Instruments Holland BV
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Filing: 1987-05-26
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Granted: —
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Expires: 2007-05-26
Abstract
Abstract A combustion engine with fuel injection system has at least one cylinder with air inlet passage. In said passage a fuel spray valve opens which is connected to a fuel pipe with the pump. In order to improve the mixing of gasoline and air and the spray action of the spray valve in particular when the engine is cold, a fuel heating element is disposed in the fuel pipe or on the spray valve said heating element is provided in the form of a thermistor of material with a positive temperature coefficient; an electrical supply and discharge cable is connected to the thermistor. The thermistor can have the form of a PTC tablet which is connected to a heat sink designed as a metal box with at least one fuel passage.
Inventors
- 👤 Gustaaf Louis Van Wechem
- 👤 Gerrit Buenk
- 👤 Fredrik Mannes Nicolaas Van Der Elst
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 21:35
CPC Classifications
F; F02; F02M; F02M53/00; F02M53/04; F02M53/06; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
Combustion engine with fuel injection system, said engine having at least one cylinder with an air inlet passage, into which passage opens a fuel spray valve which is connected to a fuel pipe with pump, while disposed in the fuel pipe or on the spray valve is a fuel heating element with which the infet fuel can come into direct contact, characterized in that the fuel heating element is provided in the form of a thermistor of material with a positive temperature coefficient, said thermistor being connected to an electrical supply and discharge cable.
Claim 2
Dependent Claim
94 words
Combustion engine with fuel injection system, said engine having at least one cylinder with an air inlet passage, into which passage opens a fuel spray valve which is connected to a fuel pipe with pump, while disposed in the fuel pipe or on the spray valve is a fuel heating element with which the infet fuel can come into direct contact, characterized in that the fuel heating element is provided in the form of a thermistor of material with a positive temperature coefficient, said thermistor being connected to an electrical supply and discharge cable.
Claim 3
Dependent Claim
44 words
Combustion engine according to claim 1, characterized in that accommodated in the electrical cables is a thermostat which is connected to a temperature sensor in the engine and which switches off the electric current to the thermistor when a particular engine temperature is reached.
Claim 4
Dependent Claim
47 words
Spray valve intended for an engine according to claim 1, characterized in that a holder is disposed on the spray valve and has therein the thermistor in the form of a PTC tablet which is connected to a heat sink for transfer of heat to the fuel.
Claim 5
Dependent Claim
24 words
Spray valve according to claim 3, characterized in that the heat sink is designed as a metal box with at least one fuel passage.
Claim 6
Dependent Claim
23 words
Spray valve according to claim 4, characterized in that the fuel passage is spiral-shaped and is on the outer periphery of the box.
Claim 7
Dependent Claim
19 words
Spray valve according to claim 5, characterized in that turbulence-generating parts are disposed in the wall of the passage.
Claim 8
Dependent Claim
18 words
Spray valve according to claim 3, characterized in that the PTC tablet is placed between two heat sinks.
Claim 9
Dependent Claim
19 words
Spray valve according to claim 3, characterized in that the holder with thermistor is integral with the spray valve.
Claim 10
Dependent Claim
27 words
Fuel heating system for a combustion engine according to claim 1, characterized in that the PTC material is applied at the fuel passage of the injection member.
Claim 11
Dependent Claim
20 words
Fuel heating system according to claim 9, characterized in that the heating member has a shape optimalized for heat transfer.
Claim 12
Dependent Claim
22 words
Fuel heating system according to claim 10, characterized in that heating member is positioned in the fuel passage in the injection member.
Claim 13
Dependent Claim
21 words
Fuel heating system according to claims 9, 10 and 11, characterized in that the heating member consists of porous PTC material.
Claim 14
Dependent Claim
33 words
Fuel heating system according to claim 9, characterized in that the heating member is positioned on the outer side of the downstream end of the fuel injection member and about the injection opening.
References Cited (Backward Citations)
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