US4600825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated diesel engine fuel conveying system
Assignee: Individual
•
Filing: 1983-05-27
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Granted: 1986-07-15
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Expires: 2003-05-27
Abstract
Abstract The invention relates to a system for conveying fuel, preferably diesel fuel, to an engine, in particular a diesel engine. The invention includes a pipe, at least one filter and a fuel pump. At least one heating element is provided on a portion of the area of the surface of the filter and in the path of the diesel fuel for partially melting paraffin deposits of the fuel on the heated portion of the filter surface. The heating element extends over only a portion of the surface of the filter, for example over 0.02 to 20 percent of said surface relative to a diesel engine power of 36 kW to 4500 kW. The heating element may be controlled in response to fuel flow through the filter, the pressure difference between the downstream and upstream sides of the filter, absolute pressure on the downstream side of the filter, or in response to the temperature difference between the temperature of the fuel at points upstream and downstream of the filter. The heating element wattage of the filter is 1 watt to 1000 W relative to a diesel engine power of 36 kW to 4500 kW.
Inventors
- 👤 Walter Blazejovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:14
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; B; B01; B01D; B01D35/00; B01D35/18; F02M; F02M37/00; F02M37/22; F02M37/30; F02M53/00; F02M53/02; F02M55/00; F02B; F02B3/00; F02B3/06; F02D; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/0606; F02M2200/00; F02M2200/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
161 words
A system for conveying diesel fuel to a diesel engine comprising a pipe means, a first filter, a second filter downstream of and in series with the first filter and a fuel pump, each of said filters having an electrically heatable heating element located on a portion of the area of the surface of the filter and in the path of the diesel fuel, said heating element of each filter being supplied by a battery, the heating element wattage of the heating element of each filter being 1 watt to 1000 watts relative to a diesel engine power of 36 kW to 4500 kW, said portion of the areas of each filter heated by the heating element associated therewith being only 0.02 percent to 20 percent of the filter surface area of the filter relative to a diesel engine power of 36 kW to 4500 kW for melting paraffin deposits of the fuel on the heated portion of the filter surface.
Claim 2
Independent Claim
161 words
A system for conveying diesel fuel to a diesel engine comprising a pipe means, a first filter, a second filter downstream of and in series with the first filter and a fuel pump, each of said filters having an electrically heatable heating element located on a portion of the area of the surface of the filter and in the path of the diesel fuel, said heating element of each filter being supplied by a battery, the heating element wattage of the heating element of each filter being 1 watt to 1000 watts relative to a diesel engine power of 36 kW to 4500 kW, said portion of the areas of each filter heated by the heating element associated therewith being only 0.02 percent to 20 percent of the filter surface area of the filter relative to a diesel engine power of 36 kW to 4500 kW for melting paraffin deposits of the fuel on the heated portion of the filter surface.
Claim 3
Dependent Claim
36 words
A system according to claim 1, wherein each said heating element is separately controlled by means of a flowmeter responsive to the flow of the fuel through the filter on which said heating element is located.
Claim 4
Dependent Claim
35 words
A system according to claim 1, wherein each said heating element is controlled by means of a pressure sensor responsive to the absolute pressure in the path of the fuel downstream of said second filter.
Claim 5
Dependent Claim
42 words
A system according to claim 3, wherein said pressure sensor is located in the path of the fuel downstream of said second filter and is operatively associated with a switch connected in series with said battery and each of said heating elements.
Claim 6
Dependent Claim
55 words
A system according to claim 1, wherein each said heating element is separately controlled by means of temperature sensors responsive to the temperature difference between two points in the path of the fuel, one point being upstream of the filter associated with each said heating element and the other point being downstream of said filter.
Claim 7
Dependent Claim
112 words
A system according to claim 5, further comprising a first temperature sensor located in the path of the fuel upstream of each said filter to sense the temperature at said one point, a second temperature sensor located in the path of the fuel downstream of each said filter to sense the temperature at said other point, each temperature sensor providing a signal representative of sensed temperature, comparison means for comparing the signals representative of sensed temperature and generating a difference signal representative of the difference between the sensed temperatures, and switch means connected in series with said battery and each said heating element, said switch means being responsive to said difference signal.
Claim 8
Independent Claim
172 words
A system for conveying diesel fuel to a diesel engine having a power of 36 kW to 135 kW, said device comprising a pipe means, a first filter, a second filter and a fuel pump, the second filter being downstream of and in series with the first filter and the fuel pump, each of said filters having an electrically heatable heating element located on a portion of the area of the surface of the filter and in the path of the diesel fuel, wherein said heating elements are supplied by a battery, the heating element wattage of the heating element of each filter being 10 watts to 30 watts relative to a diesel engine power of 36 kW to 135 kW and said portions of the area of each filter heated by the heating element associated therewith being only 1 to 5 square centimeters relative to a diesel engine power of 36 kW to 135 kW for partially melting paraffin deposits of the fuel on the heated portion of the filter surface.
Claim 9
Independent Claim
172 words
A system for conveying diesel fuel to a diesel engine having a power of 36 kW to 135 kW, said device comprising a pipe means, a first filter, a second filter and a fuel pump, the second filter being downstream of and in series with the first filter and the fuel pump, each of said filters having an electrically heatable heating element located on a portion of the area of the surface of the filter and in the path of the diesel fuel, wherein said heating elements are supplied by a battery, the heating element wattage of the heating element of each filter being 10 watts to 30 watts relative to a diesel engine power of 36 kW to 135 kW and said portions of the area of each filter heated by the heating element associated therewith being only 1 to 5 square centimeters relative to a diesel engine power of 36 kW to 135 kW for partially melting paraffin deposits of the fuel on the heated portion of the filter surface.
Claim 10
Dependent Claim
33 words
A system according to claim 7, wherein the diesel engine has a power of 36 kW, said portion of said area is 1 square centimeter and the heating element wattage is 10 watts.
Claim 11
Dependent Claim
33 words
A system according to claim 7, wherein the diesel engine has a power of 135 kW, said portion of said area is 5 square centimeters and the heating element wattage is 30 watts.
Claim 12
Independent Claim
171 words
A system for conveying diesel fuel to a diesel engine having a power of 250 kW to 4500 kW, said device comprising a pipe means, a first filter, a second filter and a fuel pump, the second filter being downstream of and in series with the first filter and the fuel pump, each of said filters having an electrically heatable heating element located on a portion of the area of the surface of the filter and in the path of the diesel fuel, said heating element of each filter being supplied by a battery, the heating element wattage of each heating element being 100 watts to 300 watts relative to a diesel engine power of 250 kW to 4500 kW, and the portion of the area of each filter heated by the heating element associated therewith being only 10 to 200 square centimeters relative to a diesel engine power of 250 kW to 4500 kW for partially melting paraffin deposits of the fuel on the heated portion of the filter surface.
Claim 13
Independent Claim
171 words
A system for conveying diesel fuel to a diesel engine having a power of 250 kW to 4500 kW, said device comprising a pipe means, a first filter, a second filter and a fuel pump, the second filter being downstream of and in series with the first filter and the fuel pump, each of said filters having an electrically heatable heating element located on a portion of the area of the surface of the filter and in the path of the diesel fuel, said heating element of each filter being supplied by a battery, the heating element wattage of each heating element being 100 watts to 300 watts relative to a diesel engine power of 250 kW to 4500 kW, and the portion of the area of each filter heated by the heating element associated therewith being only 10 to 200 square centimeters relative to a diesel engine power of 250 kW to 4500 kW for partially melting paraffin deposits of the fuel on the heated portion of the filter surface.
Claim 14
Dependent Claim
35 words
A system according to claim 10, wherein the diesel engine has a power of 250 kW, said portion of said area is 10 square centimeters and the wattage of the heating element is 100 watts.
Claim 15
Dependent Claim
37 words
A system according to claim 10, wherein the diesel engine has a power of 1400 to 4500 kW, said portion of said area is 20 square centimeters and the wattage of the heating element is 300 watts.
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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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |