US3577726A - Fuel system for natural gas turbocharged engine - Google Patents

Fuel system for natural gas turbocharged engine Download PDF

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Publication number
US3577726A
US3577726A US844517A US3577726DA US3577726A US 3577726 A US3577726 A US 3577726A US 844517 A US844517 A US 844517A US 3577726D A US3577726D A US 3577726DA US 3577726 A US3577726 A US 3577726A
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Prior art keywords
turbocharger
gas
engine
crankcase
backfire
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Expired - Lifetime
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US844517A
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Harold H Wagner
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Caterpillar Inc
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Caterpillar Tractor Co
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Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0293—Safety devices; Fail-safe measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10236—Overpressure or vacuum relief means; Burst protection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10275—Means to avoid a change in direction of incoming fluid, e.g. all intake ducts diverging from plenum chamber at acute angles; Check valves; Flame arrestors for backfire prevention
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2710/00—Gas engines
    • F02B2710/02—Four stroke engines
    • F02B2710/023—Four stroke engines with measures for charging, increasing the power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • Natural gas is often available as a low cost engine fuel, but in many cases, the source is of low pressure gas which presents a problem of introducing it into the high pressure air stream of a turbocharged engine. Compressors have been employed to solve this problem but they are costly to acquire and operate and tend to offset the advantage of the low cost fuel. Other problems arise from the use of gas as a fuel in connection with backfiring which occurs in a spark-ignited engine and also in connection with the accumulation of the highly combustible mixture in the engine crankcase.
  • a conventional-air cleaner is shown at 10 and air flowing from the cleaner is directed through a conduit 12 to the compression section 14 of a turbocharger.
  • a carburetor generally indicated at 16 mixes air and natural gas, the latter entering through a pipe 18.
  • the carburetor will not be described in detail as it is one of several such devices manufactured forthe purpose of combining air and gas and maintaining a proper fuel-air ratio.
  • the air and gas so combined are directed to the turbocharger and thence through an aftercooler 20, which is also of conventional design, to a backfire relief device generally indicated at 22.
  • a passage 24 of this device communicates with an intake manifold 26 of an engine which is not shown.
  • a butterfly valve 34 in the passage controls the volume of combustible mixture to the engine and is adjusted as by a governor (not shown) or other simple means with which it is connected by linkeage, a part of which is shown at 30.
  • the screen operates in this manner because the heat of the backfire is so dissipated by the large surface area of the screen that ignition of the combustible mixture would not occur to cause damage to parts upstream of the backfire relief device.
  • conduit means directing air to the turbocharger from the upstream side thereof in the direction of flow through said turbocharger, means for admitting gas into said conduit means to provide a combustible fuel mixture upstream of said turbocharger, a crankcase for said turbocharged engine, a conduit connected between said turbocharger and said crankcase through which turbocharger lubricating oil is drained to said crankcase, and a gas-oil separator to separate any combustible fuel mixture which may pass with said lubricating oil through said conduit.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Supercharger (AREA)

Abstract

A turbocharged natural gas engine adapted for use with very low pressure gas by virtue of introducing the gas and combining it with air to provide a combustible mixture upstream of or on the low pressure side of the turbocharger. Safety means are provided to insure against damage by backfire and against admission of explosive gases to the engine crankcase.

Description

United States Patent 1 13,577,726
[72] Inventor Harold H. Wagner [56] References Cited Peoria, UNITED STATES PATENTS [21] P 1,138,628 5/1915 Cook 123/142 [22] My 1 835 299 12/1931 Greuter 123/142 Patented May 4,1971 [73] Assi ee Cater mar Tractor Co 2,511,348 6/ 1950 K1ttler 60/13 P m 3,052,085 9/1962 Tauschek 60/13 "5" 3,077,189 2/1963 Eamshaw 123/65 3,464,202 9/1969 Wagner 60/ 13 1 Primary Examiner-Douglas Hart [54] FUEL SYSTEM FOR NATURAL GAS AttorneyFryer, Tjensvold, Feix, Phillips and Lempio TURBOCHARGED ENGINE p 5 Chums l Drawmg ABSTRACT: A turbocharged natural gas engine adapted for [52] US. Cl 60/13, use with very low pressure gas by virtue of introducing the gas 123/ 1 19, 123/120, 123/ 142 and combining it with air to provide a combustible mixture up- [51] lnt.Cl. ..F02b 37/00, stream of or on the low pressure side of the turbocharger. F02m 21/04 Safety means are provided to insure against damage by Field of Search 1 3, backfire and against admission of explosive gases to the engine 39.11; 123/142, 119 (C), 120 crankcase.
AFTERCOOLER TD CRANKCASE PATENTED HAY 4 l9?! M2235 EAL INVENTOR HAROLD H. WAGNER Mfg- ATTORNEYS v BY WW FUEL SYSTEM FOR NATURAL GAS TURBOCHARGED ENGINE Natural gas is often available as a low cost engine fuel, but in many cases, the source is of low pressure gas which presents a problem of introducing it into the high pressure air stream of a turbocharged engine. Compressors have been employed to solve this problem but they are costly to acquire and operate and tend to offset the advantage of the low cost fuel. Other problems arise from the use of gas as a fuel in connection with backfiring which occurs in a spark-ignited engine and also in connection with the accumulation of the highly combustible mixture in the engine crankcase.
The present invention overcomes the problems recited above as well as others and will best be understood from the following specification which makes reference to the accompanying drawing.
The drawing is a schematic view with parts in section of mechanism employed in carrying the system of the present invention into practice. 7
in the drawing a conventional-air cleaner is shown at 10 and air flowing from the cleaner is directed through a conduit 12 to the compression section 14 of a turbocharger. A carburetor generally indicated at 16 mixes air and natural gas, the latter entering through a pipe 18. The carburetor will not be described in detail as it is one of several such devices manufactured forthe purpose of combining air and gas and maintaining a proper fuel-air ratio.
The air and gas so combined are directed to the turbocharger and thence through an aftercooler 20, which is also of conventional design, to a backfire relief device generally indicated at 22. A passage 24 of this device communicates with an intake manifold 26 of an engine which is not shown. A butterfly valve 34 in the passage controls the volume of combustible mixture to the engine and is adjusted as by a governor (not shown) or other simple means with which it is connected by linkeage, a part of which is shown at 30.
The present invention incorporates two safety devices, one of which is the backfire relief device. This device has a cover 28 held in place by springs 30, the preload upon which is such that the cover will not be raised by normal engine operating pressures, but will be lifted against the force of the springs to relieve greater pressures experienced upon engine backfire. This relief device includes a metal screen 32 through which the backfire flame would have to pass in order to travel into the vicinity of the combustible mixture being delivered to the engine.
The screen operates in this manner because the heat of the backfire is so dissipated by the large surface area of the screen that ignition of the combustible mixture would not occur to cause damage to parts upstream of the backfire relief device.
Another advantage of the present system is that it prevents accumulation of the combustible mixture in the engine crankcase. The compressor includes lubricated bearings and excess lubricant is caught in a well 36in its housing and conveyed through a conduit 38 to a gas liquid separator generally indicated at 40. The separator comprises a closed container with screens 42 separating it into upper and lower sections. it has an outlet through a conduit 44 which communicates with the intake conduit 12 and gas passing upwardly through the screens 42 deposits oil entrained therewith on the screens from which the oil gravitates to a collection sump in the body of the housing. When the oil level reaches an outlet pipe 46 which communicates with a stand pipe 48, it flows by gravity to the engine crankcase. The stand pipe 48 is vented to atmosphere at its upper end to permit oil to freely enter its lower end. Thus, gaseous fuel which may enter the chamber 36 of the turbocharger through bearings which support the blower shaft passes with the oil to the gas separator 40 and is returned into the fuel stream without danger of entering the crankcase where its ignition could be extremely dangerous.
I claim:
1. in a fuel system for a natural gas turbocharged engine; a turbocharger, conduit means directing air to the turbocharger from the upstream side thereof, in the direction of fluid flow through said turbocharger, means for admitting gas into sard conduit means to provide a combustible fuel mixture upstream of said turbocharger, an intake manifold for said turbocharged engine, passage means connecting said turbocharger and said intake manifold, and a backfire pressure relief device located in said passage means between said turbocharger and said intake manifold to effectively isolate said turbocharger from the harmful efiects of backfiring in said intake manifold.
2. The invention of claim 1 in which the backfire pressure relief device has a wire screen to dissipate heat from backfire gas positioned to prevent flame from moving upstream in the direction of fluid flow through the fuel system.
3. The invention of claim 1 wherein the backfire pressure relief device includes a chamber defined by walls and a cover member which directly separates the interior of said chamber from the ambient and is yieldingly urged to close off said chamber from said ambient.
4. In a fuel system for turbocharged natural gas engine; a turbocharger, conduit means directing air to the turbocharger from the upstream side thereof in the direction of flow through said turbocharger, means for admitting gas into said conduit means to provide a combustible fuel mixture upstream of said turbocharger, a crankcase for said turbocharged engine, a conduit connected between said turbocharger and said crankcase through which turbocharger lubricating oil is drained to said crankcase, and a gas-oil separator to separate any combustible fuel mixture which may pass with said lubricating oil through said conduit.
5. The invention of claim 4 with means for directing the separated fuel mixture back into the system upstream of the turbocharger.

Claims (4)

  1. 2. The invention of claim 1 in which the backfire pressure relief device has a wire screen to dissipate heat from backfire gas positioned to prevent flame from moving upstream in the direction of fluid flow through the fuel system.
  2. 3. The invention of claim 1 wherein the backfire pressure relief device includes a chamber defined by walls and a cover member which directly separates the interior of said chamber from the ambient and is yieldingly urged to close off said chamber from said ambient.
  3. 4. In a fuel system for turbocharged natural gas engine; a turbocharger, conduit means directing air to the turbocharger from the upstream side thereof in the direction of flow through said turbocharger, means for admitting gas into said conduit means to provide a combustible fuel mixture upstream of said turbocharger, a crankcase for said turbocharged engine, a conduit connected between said turbocharger and said crankcase through which turbocharger lubricating oil is drained to said crankcase, and a gas-oil separator to separate any combustible fuel mixture which may pass with said lubricating oil through said conduit.
  4. 5. The invention of claim 4 with means for directing the separated fuel mixture back into the system upstream of the turbocharger.
US844517A 1969-07-24 1969-07-24 Fuel system for natural gas turbocharged engine Expired - Lifetime US3577726A (en)

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884658A (en) * 1972-04-18 1975-05-20 Pall Corp Air cleaner for supercharged engines
US3910049A (en) * 1974-01-30 1975-10-07 Garrett Corp Fuel trap evacuation system
WO1984002955A1 (en) * 1983-01-25 1984-08-02 Jenbacher Werke Ag Combustion engine with supercharging device
FR2553827A1 (en) * 1983-10-21 1985-04-26 Volkswagenwerk Ag Vehicle IC engine with supercharger and charge cooler
DE3838264A1 (en) * 1988-11-11 1990-05-17 Motoren Werke Mannheim Ag Air filter system for an internal combustion engine
US5375580A (en) * 1992-01-23 1994-12-27 Air Products And Chemicals, Inc. Internal combustion engine with cooling of intake air using refrigeration of liquefied fuel gas
US5375582A (en) * 1993-12-03 1994-12-27 Mk Rail Corporation Method and apparatus for regulating temperature of natural gas fuel
US5408978A (en) * 1993-05-03 1995-04-25 Davis Family Trust Gaseous fuel entrainment apparatus and process
US5447142A (en) * 1994-12-06 1995-09-05 Caterpillar Inc. Method and apparatus for maintaining reservoir pressure of a consumable, compressible fuel
US6550461B2 (en) * 2000-10-12 2003-04-22 Jenbacher Aktiengesellschaft Internal combustion engine
US6694944B2 (en) 2001-12-20 2004-02-24 Caterpillar Inc. Rapid compression prechamber for internal combustion engine
US7100582B1 (en) * 2005-04-28 2006-09-05 Dynamic Fuel Systems, Inc. Propane injection control system and apparatus for vehicles
US20070062187A1 (en) * 2002-09-25 2007-03-22 Peter Kacev Turbocharged compression ignition engine
AU2007200911B2 (en) * 2002-09-25 2007-05-24 Caterpillar Global Mining Expanded Products Pty Ltd Turbocharged compression ignition engine
EP1884651A1 (en) * 2006-08-01 2008-02-06 GM Global Technology Operations, Inc. Oil separator for gas operated internal combustion engines
US20080251056A1 (en) * 2005-12-20 2008-10-16 Yoshiro Iwai Mixer
US20090126691A1 (en) * 2007-11-16 2009-05-21 Jeff Bach Super Cooled Air And Fuel Induction System For Internal Combustion Engines
US20110166769A1 (en) * 2010-01-07 2011-07-07 Jeffrey Douglas Buechler Supplemental Vapor Fuel Injection System for Internal Combustion Engines
US20140123927A1 (en) * 2012-11-02 2014-05-08 Speed Of Air, Inc. Intake plenum pressure release valve
US20140261351A1 (en) * 2013-03-14 2014-09-18 Cummins Ip, Inc. Air-Fuel-Ratio Dithering Using a Dual Fuel Path Source
CN105840348A (en) * 2016-03-29 2016-08-10 成都科力夫科技有限公司 Fuel gas injection system for dual-fuel automobile
EP3734038A4 (en) * 2017-12-26 2021-08-25 LG Electronics Inc. GAS HEAT PUMP SYSTEM
US11891961B1 (en) * 2022-08-03 2024-02-06 Caterpillar Inc. Gaseous fuel engine system and operating strategy for limiting crankcase fuel accumulation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1138628A (en) * 1914-01-21 1915-05-11 Adam F Cook Mixing-valve.
US1835299A (en) * 1929-06-28 1931-12-08 Charles R Greuter Supercharging apparatus for internal combustion engines
US2511348A (en) * 1946-07-26 1950-06-13 George M Holley Supercharger control
US3052085A (en) * 1958-11-21 1962-09-04 Thompson Ramo Wooldridge Inc Control for exhaust driven supercharger
US3077189A (en) * 1960-05-13 1963-02-12 Alvin R Earnshaw Diesel engine converted into a twocycle gas engine
US3464202A (en) * 1967-11-14 1969-09-02 Caterpillar Tractor Co Density limiting turbocharger control system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1138628A (en) * 1914-01-21 1915-05-11 Adam F Cook Mixing-valve.
US1835299A (en) * 1929-06-28 1931-12-08 Charles R Greuter Supercharging apparatus for internal combustion engines
US2511348A (en) * 1946-07-26 1950-06-13 George M Holley Supercharger control
US3052085A (en) * 1958-11-21 1962-09-04 Thompson Ramo Wooldridge Inc Control for exhaust driven supercharger
US3077189A (en) * 1960-05-13 1963-02-12 Alvin R Earnshaw Diesel engine converted into a twocycle gas engine
US3464202A (en) * 1967-11-14 1969-09-02 Caterpillar Tractor Co Density limiting turbocharger control system

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884658A (en) * 1972-04-18 1975-05-20 Pall Corp Air cleaner for supercharged engines
US3910049A (en) * 1974-01-30 1975-10-07 Garrett Corp Fuel trap evacuation system
WO1984002955A1 (en) * 1983-01-25 1984-08-02 Jenbacher Werke Ag Combustion engine with supercharging device
EP0117864A1 (en) * 1983-01-25 1984-09-05 Jenbacher Werke AG Combustion engine
FR2553827A1 (en) * 1983-10-21 1985-04-26 Volkswagenwerk Ag Vehicle IC engine with supercharger and charge cooler
DE3838264A1 (en) * 1988-11-11 1990-05-17 Motoren Werke Mannheim Ag Air filter system for an internal combustion engine
US5375580A (en) * 1992-01-23 1994-12-27 Air Products And Chemicals, Inc. Internal combustion engine with cooling of intake air using refrigeration of liquefied fuel gas
US5408978A (en) * 1993-05-03 1995-04-25 Davis Family Trust Gaseous fuel entrainment apparatus and process
US5375582A (en) * 1993-12-03 1994-12-27 Mk Rail Corporation Method and apparatus for regulating temperature of natural gas fuel
US5447142A (en) * 1994-12-06 1995-09-05 Caterpillar Inc. Method and apparatus for maintaining reservoir pressure of a consumable, compressible fuel
US6550461B2 (en) * 2000-10-12 2003-04-22 Jenbacher Aktiengesellschaft Internal combustion engine
US6694944B2 (en) 2001-12-20 2004-02-24 Caterpillar Inc. Rapid compression prechamber for internal combustion engine
US20080072594A1 (en) * 2002-09-25 2008-03-27 Dbt Australia Pty Limited Turbocharged compression ignition engine
US20070062187A1 (en) * 2002-09-25 2007-03-22 Peter Kacev Turbocharged compression ignition engine
AU2007200911B2 (en) * 2002-09-25 2007-05-24 Caterpillar Global Mining Expanded Products Pty Ltd Turbocharged compression ignition engine
US7451598B2 (en) 2002-09-25 2008-11-18 Dbt Australia Pty Limited Turbocharged compression ignition engine
US7100582B1 (en) * 2005-04-28 2006-09-05 Dynamic Fuel Systems, Inc. Propane injection control system and apparatus for vehicles
US20080251056A1 (en) * 2005-12-20 2008-10-16 Yoshiro Iwai Mixer
US7765992B2 (en) * 2005-12-20 2010-08-03 Iwai Trading Co., Ltd. Fuel mixer
RU2442012C2 (en) * 2006-08-01 2012-02-10 Джи Эм Глоубал Текнолоджи Оперейшнз, Инк. Oil separator for combustion engines with gas fuel performance
US8534266B2 (en) * 2006-08-01 2013-09-17 GM Global Technology Operations LLC Oil separator for gas-powered combustion engines
US20100012097A1 (en) * 2006-08-01 2010-01-21 Gm Global Technology Operations, Inc. Oil separator for gas-powered combustion engines
EP1884651A1 (en) * 2006-08-01 2008-02-06 GM Global Technology Operations, Inc. Oil separator for gas operated internal combustion engines
CN101517220B (en) * 2006-08-01 2011-08-17 Gm全球科技运作股份有限公司 Oil separator for gas-powered internal combustion engines
WO2008014939A1 (en) * 2006-08-01 2008-02-07 Gm Global Technology Operations, Inc. Oil separator for gas-powered internal combustion engines
US7841322B2 (en) 2007-11-16 2010-11-30 Dynamic Fuel Systems, Inc. Super cooled air and fuel induction system for internal combustion engines
US20090126691A1 (en) * 2007-11-16 2009-05-21 Jeff Bach Super Cooled Air And Fuel Induction System For Internal Combustion Engines
US20110166769A1 (en) * 2010-01-07 2011-07-07 Jeffrey Douglas Buechler Supplemental Vapor Fuel Injection System for Internal Combustion Engines
US20140123927A1 (en) * 2012-11-02 2014-05-08 Speed Of Air, Inc. Intake plenum pressure release valve
US20140261351A1 (en) * 2013-03-14 2014-09-18 Cummins Ip, Inc. Air-Fuel-Ratio Dithering Using a Dual Fuel Path Source
US9359968B2 (en) * 2013-03-14 2016-06-07 Cummins Ip, Inc. Air-fuel-ratio dithering using a dual fuel path source
CN105840348A (en) * 2016-03-29 2016-08-10 成都科力夫科技有限公司 Fuel gas injection system for dual-fuel automobile
EP3734038A4 (en) * 2017-12-26 2021-08-25 LG Electronics Inc. GAS HEAT PUMP SYSTEM
US11402133B2 (en) 2017-12-26 2022-08-02 Lg Electronics Inc. Gas heat pump system
US11891961B1 (en) * 2022-08-03 2024-02-06 Caterpillar Inc. Gaseous fuel engine system and operating strategy for limiting crankcase fuel accumulation
US20240044296A1 (en) * 2022-08-03 2024-02-08 Caterpillar Inc. Gaseous fuel engine system and operating strategy for limiting crankcase fuel accumulation

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