Fuel Switched In Response To Engine Starting Condition Patents (Class 123/576)
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Publication number: 20020185086Abstract: A fuel supply for an internal combustion engine includes providing a source of a first fluid fuel and a source of a second fluid fuel which are separate from one another, sensing at least one operational parameter of an internal combustion engine, supplying the first fuel from the one source and the second fuel from the other source in quantities which are determined in correspondence with the sensed operational parameter of the internal combustion engine, and mixing the first fuel and the second fuel in with the quantities determined in correspondence with the sensed operational parameter so as to produce a fuel mixture to be supplied to the internal combustion engine.Type: ApplicationFiled: May 4, 2001Publication date: December 12, 2002Inventors: Paul Newman, Dale Ulan
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Patent number: 6467470Abstract: The present invention relates to a fuel system as well as a method for controlling the same. More specifically, it relates to a fuel system of motor vehicles adapted to be powered by alcohol-containing fuels, and specifically by alcohol-containing fuels and by petrol, so-called Flexible Fuel Vehicles (FFV). These vehicles can be powered by fuels with varying alcohol content, and also by pure petrol. The fuel system according to the invention comprises a main tank (1) for fuel, a cold-start tank (2) with fuel which is sufficiently inflammable to be used in connection with cold starts, as well as fuel line system connecting these tanks to each other and to injection means of the engine of the vehicle, where at least one pump (8, 13) is adapted to transfer fuel through the fuel line system. Specifically, the invention relates to a system which is controlled so that fuel is transferred from the main tank (1) to the cold-start tank (2) when the alcohol content of the fuel is below a predetermined threshold value.Type: GrantFiled: October 5, 2000Date of Patent: October 22, 2002Assignee: AB VolvoInventors: Jan Olof Carlsson, Lars Greger, Klas Bertil Jansson
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Patent number: 6371094Abstract: A method and an apparatus for forming a fuel-air mixture for an internal combustion engine during a cold-starting and warmup phase. During the normal operation of the engine, fuel is evaporated by means of an evaporation and condensation system in order to recover low-boiling fuel components from the fuel delivered to first fuel delivery means during normal operation. The low-boiling fuel components condense and are collected as cold-starting fuel in a supply container. The engine, during the cold-starting and warmup phase, is supplied with cold-starting fuel from the supply container by means of second fuel delivery means, in order to reduce the concentration of hydrocarbons in the exhaust gas during the cold-starting and warmup phase.Type: GrantFiled: September 29, 2000Date of Patent: April 16, 2002Assignee: Robert Bosch GmbHInventor: Wolfgang Wagner
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Publication number: 20010027781Abstract: A delivery device (2) for delivering fuel, having a delivery pump (3) and a fuel filter (7), has a bypass line (9) which is conducted past the fuel filter (7). When new, the delivery pump (3) delivers fuel through the fuel filter (7). After the fuel filter (7) has become clogged with dirt, the fuel is delivered by the bypass line (9) through a second fuel filter (10). By this means, pollution of the environment with fuel is kept particularly low.Type: ApplicationFiled: March 13, 2001Publication date: October 11, 2001Inventors: Bernd Rumpf, Christian Kochsmeier, Dieter Keller, Peter-Andreas Low
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Patent number: 6135426Abstract: The priming system for a dual feed internal combustion engine provides a lighter, starting fuel to the venturi, the fuel nozzle, or to the carburetor bowl for engine starting. In a first embodiment, the starting or secondary fuel is mixed with the primary fuel in the fuel bowl, and the pure secondary fuel is provided to the fuel nozzle by actuation of a manually-operable primer. In a second embodiment, the secondary fuel is mixed with the primary fuel in the carburetor fuel bowl, and a shot of pure secondary fuel is provided directly to the carburetor venturi by the actuation of a manually-operable primer. In a third embodiment, a primer is manually operated before engine starting to remove primary fuel from the carburetor bowl and return it to the primary fuel tank. Thereafter, pure secondary fuel is provided directly to the carburetor bowl for engine starting through a changeover valve.Type: GrantFiled: January 7, 1998Date of Patent: October 24, 2000Assignee: Briggs and Stratton CorporationInventors: Greg Wargolet, Tim Buszkiewicz, Paul Warren
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Patent number: 6119637Abstract: A gasoline distillation apparatus (12) for an engine (14) includes a heated vapor separator (22), a condenser (24), and a controller (28). The heated vapor separator (22) partially vaporizes the engine's primary fuel (16) to generate a fuel vapor (44). The condenser (24) cools the fuel vapor (44) to produce a liquid secondary fuel (18) that is more volatile than the primary fuel (16). The controller (28) determines when the engine (14) is supplied with either primary (16) or secondary fuel (18). The secondary fuel (18) is used only during an initial engine operation period, while the primary fuel (16) is used all other times. After engine operation, the primary fuel (16) is purged from the engine (14) and replaced with the secondary fuel (18) to maximize secondary fuel (18) use during the initial engine operation period.Type: GrantFiled: July 6, 1999Date of Patent: September 19, 2000Assignee: Ford Global Technologies, Inc.Inventors: Ronald D. Matthews, Rudolf H. Stanglmaier, George Carver Davis, Wengang Dai
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Patent number: 6105561Abstract: In a fuel feeding system for an internal combustion engine adapted to selectively operate with gasoline or with a gas, such as LPG or methane, the engine is compelled to restart automatically in the gasoline mode after a stop during which the gas reservoir has been filled.Type: GrantFiled: December 11, 1998Date of Patent: August 22, 2000Assignee: C.R.F. Societa Consortile per AzioniInventors: Massimo Ferrera, Riccardo Gozzelino, Aldo Perotto
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Patent number: 5996562Abstract: A process is provided for drawing low-boiling volatile components, such as 2-methylbutane, 2,3-dimethylbutane and pentane, out of fuel in a fuel tank of a passenger car or utility vehicle by applying a vacuum to the fuel tank by means of a diaphragm pump; suctioning off the low-boiling volatile components and condensing the low-boiling volatile components under a pressure that is greater than 1.0 bar. The low-boiling volatile components may be stored in a storage tank and used as engine fuel during cold start of the engine or used as a reducing agent for nitrogen oxides in the exhaust gas from the engine.Type: GrantFiled: April 6, 1998Date of Patent: December 7, 1999Assignee: Dornier GmbHInventors: Carsten Plog, Renato Andorf, Thomas Stengel
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Patent number: 5775282Abstract: An auxiliary injector arrangement in a fuel supply system for an internal combustion engine. The auxiliary injector arrangement includes at least one injector mounted in the inlet manifold upstream or downstream of the throttle and adapted to supply fuel at times when the main fuel supply system cannot supply sufficient fuel. The main fuel supply system and the auxiliary injector may be operated on LPG, natural gas or petrol. The auxiliary injector may be a liquid fuel injector or gaseous fuel injector.Type: GrantFiled: December 20, 1996Date of Patent: July 7, 1998Assignee: The Energy Research and Development CorporationInventor: Rodney Sinclair Smith
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Patent number: 5775281Abstract: A method and an arrangement for determining the presence of heat soak conditions in an internal combustion engine (1) of a type using fuel injection. Particularly useful when the or one of the fuels used in the engine (1) is susceptible to vaporisation in a fuel rail (8) due to high engine temperatures. The method includes the steps of measuring a first temperature in a tank (10) for the fuel, measuring a second temperature at the fuel rail (8), ascertaining the difference between the first and second temperature, wherein a significant difference indicates heat soak conditions. If heat soak conditions are detected then an auxiliary injector (20) may be operated or in dual fuel engines a higher boiling point fuel may be used.Type: GrantFiled: December 20, 1996Date of Patent: July 7, 1998Assignee: The Energy Research and Development CorporationInventor: Rodney Sinclair Smith
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Patent number: 5566653Abstract: An improved starting system for internal combustion engines that normally use a liquid fuel such as gasoline. Gaseous fuels such as hydrogen, natural gas, propane, butane and the like are used in place of the liquid fuel during engine starting and for a selected period thereafter. When starting is initiated, the gasoline introduction system is disabled and introduction of the gaseous fuel in initiated. Rapid engine start promptly occurs, even under very cold ambient conditions. Once the engine has started and has run for a period sufficient to reach a reasonable operating temperature, the gaseous fuel introduction system is interrupted and the gasoline system is enabled and provides the fuel thereafter. If desired, gaseous fuel flow may continue for a short period after liquid fuel flow has begun.Type: GrantFiled: May 11, 1995Date of Patent: October 22, 1996Inventor: James J. Feuling
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Patent number: 5555873Abstract: A fuel tank switching apparatus provides for the automatic switching of fuel delivery systems from a tank or tanks containing fuel which is taxed, to an auxiliary tank which stores untaxed fuel therein. The apparatus is particularly adapted for use in large, over the road diesel powered semi trucks, but may be adapted to other types of motor vehicles as well. The apparatus automatically transfers fuel delivery and return to the auxiliary fuel tank whenever the parking brake is applied, which action will only occur when the truck or vehicle is parked, or possibly in very rare emergency situations. As both the parking brake annunciator (light or audible device) and the pneumatic pressure system are independent of the primary service brake system in large vehicles, the apparatus receives a signal from the parking brake system to switch tanks automatically with no intervention required or allowed by the driver or operator.Type: GrantFiled: February 16, 1995Date of Patent: September 17, 1996Inventor: Jay A. Nolen
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Patent number: 5549083Abstract: An improved starting system for internal combustion engines using gaseous fuels such as hydrogen, natural gas, propane, butane and the like. In an engine using liquid fuel injection for normal operation, a sensor for the catalytic converter is provided to sense a "cold converter" condition of the sort which occurs when the engine has not been operated for some time. When starting is initiated, the gasoline introduction system is disabled and introduction of the gaseous fuel in initiated. Rapid engine start promptly occurs, even under very cold ambient conditions. Once the engine has started and has run for a period to warm the catalytic converter to a selected temperature the gaseous fuel introduction system is interrupted and the gasoline system is enabled and provides the fuel thereafter. Catalytic converter temperature is preferably measured at the catalytic material, although measurement of exhaust gas temperature at the converter or downstream thereof is often effective.Type: GrantFiled: July 13, 1994Date of Patent: August 27, 1996Inventor: James J. Feuling
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Patent number: 5524582Abstract: An internal combustion engine having a pollution control system with a catalytic converter using a two-phase fuel system in which a small supply of flammable gaseous fuel is used for ignition and initial start-up of the engine. As the engine is warmed up and the catalytic converter is heated, the gaseous fuel is phased out and the liquid fuel is phased in.Type: GrantFiled: February 8, 1995Date of Patent: June 11, 1996Assignee: Kia Motors CorporationInventors: Chung M. Suh, Jeong J. Park
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Patent number: 5474047Abstract: A process for supplying fuel to an internal combustion engine of the multi-cylinder type with controlled fuel injection and comprising a controlled fuel vapor recovery system. During predetermined operating phases of the engine, the fuel injection is stopped for a given period, while the fuel vapors trapped in the recovery system are recycled into an intake circuit of the engine.Type: GrantFiled: September 2, 1994Date of Patent: December 12, 1995Assignee: Regie Nationale Des Usines Renault S.A.Inventors: Pierre Cochard, Bernard Vallee
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Patent number: 5357908Abstract: A method for controlling exhaust gas emissions from an engine (16) includes extracting a light distillate fuel (Fd) from conventional gasoline or other liquid hydrocarbon fuel and supplying the engine with the light distillate fuel during an initial operation period of the engine. This reduces the oxidizable pollutants in the engine exhaust during a cold-start period before a catalytic converter (22) used to abate pollutants in the engine exhaust gases has not yet attained its operating temperature. After the catalytic converter (22) has been sufficiently heated, the fuel supply to the engine (16) is switched to gasoline or other liquid hydrocarbon fuel. Both the distillate fuel (Fd) and the liquid hydrocarbon fuel may be passed through a heated cracking catalyst bed (30) to crack the fuel fed to the engine.Type: GrantFiled: April 16, 1993Date of Patent: October 25, 1994Assignee: Engelhard CorporationInventors: Shiang Sung, John J. Steger, Joseph C. Dettling, Patrick L. Burk
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Patent number: 5181488Abstract: A fuel supply system for an outboard motor having a main fuel supply for supplying fuel to the engine and an enrichment fuel supply for supplying a different fuel for starting and cold running. The enrichment fuel supply supplies fuel to the engine through a common enrichment control housing assembly that includes an enrichment pump and an enrichment fuel flow control which are both operated simultaneously. In addition, the enrichment fuel source has a vent system including a vent valve that is operated simultaneously with the enrichment fuel valve and the enrichment pump.Type: GrantFiled: October 5, 1990Date of Patent: January 26, 1993Assignee: Sanshin Kogyo Kabushiki KaishaInventor: Yoshihiro Sakurai
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Patent number: 5010870Abstract: An engine for a portable engine-pump assembly is designed to operate on a safe fuel such as JP5 or DFM. The engine is started by a starting fuel such as propane which is supplied to the engine from a pressurized propane-containing cartridge. The propane starting system uses a puncturing device which has a built-in check valve function to isolate the propane system from moisture and contaminants in the air.Type: GrantFiled: April 10, 1990Date of Patent: April 30, 1991Assignee: Hale Fire Pump CompanyInventors: Michael A. Laskaris, Kalman Broitman, Richard E. Teske, David L. Miller, Michael Sulmone
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Patent number: 5000134Abstract: Several embodiments of additional fuel supply systems for internal combustion engines that supply supplemental fuel in addition to the normal charge forming device to satisfy certain specific requirements such as cold starting and cold running. In each embodiment, a separate fuel pump is provided for the supplemental fuel discharge but it is contained within and operated by the same operator of the main fuel pump for supplying fuel to the main fuel discharge. In some embodiments, the fuel pump is downstream of the supplemental fuel control and in other embodiments it is upstream of it. In one embodiment, the fuel pump and the supplemental control are all formed in the same housing.Type: GrantFiled: October 13, 1989Date of Patent: March 19, 1991Assignee: Sanshin Kogyo Kabushiki KaishaInventors: Hiroaki Fujimoto, Seiji Inoue
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Patent number: 4955326Abstract: A dual fuel engine system and method of operating the engine reduces emission rates of polutants. The dual fuel engine includes a fuel oil supply connected to the engine and a fuel gas supply connected to the engine. Means connected between the fuel oil supply and the engine inject low levels of diesel fuel into the engine. In particular, the injection of diesel fuel is limited to pilot injection quantities only. The exhaust emission of NOx is maintained at less than 1 GM/HP-HR, where natural gas is used as the primary fuel, and less than 0.5 GM/HP-HR where digester gas is used as the primary fuel.Type: GrantFiled: April 12, 1989Date of Patent: September 11, 1990Assignee: Cooper Industries, Inc.Inventor: Melvin J. Helmich
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Patent number: 4911116Abstract: A cold-start apparatus for alcohol-fueled internal combustion engines in which a certain quantity of gasoline is injected directly into the combustion chambers upon starting. To assure reliable start-up of the engine with the aid of gasoline, and beyond a predetermined temperature, the engine is operated with only alcohol fuel. In order to make gasoline available for the cold start without entailing a major expense, a gasoline storage and supply device is provided. The supply device includes a piston which divides the housing into a work chamber which is filled with alcohol fuel from a work chamber which is filled with gasoline.Type: GrantFiled: April 3, 1989Date of Patent: March 27, 1990Assignee: Robert Bosch GmbHInventors: Werner P. Prohaska, Alvarao A. Vasconcelos
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Patent number: 4878475Abstract: A fuel supply system for internal combustion engines in which two different fuels are used, one to start the engine, to operate it at idling speed and to supplement the other fuel during acceleration, and the second to operate the engine at its normal working speed. The first fuel may be propane for starting, idling and for an acceleration supplement. The second fuel for normal working speed, or normal driving speed may be gasoline. A first vacuum controlled valve assembly delivers the first fuel such as propane from a pressurized supply tank to the carburetor below the conventional butterfly valve of the throttle control to start the engine and operate it at idle speed. A second vacuum controlled valve assembly delivers the first fuel, such as propane, to the carburetor above the butterfly valve only when the accelerator opens the throttle and its butterfly valve to initiate acceleration, and only during acceleration.Type: GrantFiled: November 21, 1988Date of Patent: November 7, 1989Inventor: Ludwig Birsa
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Patent number: 4876989Abstract: Apparatus and method are described for enhancing performance of an alcohol fueled engine during cold conditions, with such enhancement being particularly effected by generation of ether to assist cold operation including starting and/or to achieve reduced emissions during cold running. Dimethyl ether is generated by catalytic dehydration of vaporized methanol using a catalyst, preferably fluorinated alumina. Apparatus is disclosed for generating dimethyl ether on board as needed for immediate mixing with combustion air and methanol and/or for storage to enable later mixing of the dimethyl ether with combustion air and methanol to effect subsequent cold starts and/or cold running operations.Type: GrantFiled: May 10, 1988Date of Patent: October 31, 1989Assignee: Technology Development Associates, Inc.Inventors: Michael E. Karpuk, Scott W. Cowley
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Patent number: 4757796Abstract: Apparatus including a mixing chamber is installed between a standard carburetor base and the intake manifold of a gasoline engine. The mixing chamber includes an air inlet port for admitting a controlled amount of outside air into the mixing chamber and a gasoline vapor port for admitting gasoline vaporized externally of the carburetor into the mixing chamber, a carburetor inlet port for receiving a mixture of air and partially vaporized gasoline from the carburetor throat, and an outlet port through which a mixture of all the gases exhausts into the intake manifold. The carburetor includes a first throttle valve for controlling the air amount and partially vaporized gasoline passing into the mixing chamber. A second throttle valve controls the amount of mixed gas drawn through the mixing chamber outlet port into the intake manifold. A linkage connected to the automobile accelerator cable opens the second throttle in response to initial accelerator displacement.Type: GrantFiled: June 22, 1987Date of Patent: July 19, 1988Inventor: Miguel A. Jimenez
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Patent number: 4712516Abstract: A dual fuel supply for a rotary piston engine in which there is one fuel supply means for a running fuel of low volatility and another fuel supply for a starting fuel of high volatility. The starting fuel is contained in safe scaled pressurized cartridges. The temperature of the running fuel is raised to improve its combustion characteristics.Type: GrantFiled: September 25, 1985Date of Patent: December 15, 1987Assignee: Hale Fire Pump CompanyInventor: H. Alfred Eberhardt
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Patent number: 4646691Abstract: In an alcohol engine using a alcohol and foreign fuel having combustibility higher than that of the alcohol as a fuel, an auxiliary fuel quantity adjusting means and control means are provided so that a ratio of a quantity of the foreign fuel to a quantity of the alcohol in the fuel to be supplied to the engine upon cold starting of the engine may be different from that upon warm-up of the engine.Type: GrantFiled: August 6, 1985Date of Patent: March 3, 1987Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Yuuhiko Kiyota, Tooru Okada, Jun Isomoto
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Patent number: 4606319Abstract: Apparatus and methods are disclosed for controlled vaporization of a liquid fuel and delivery of the vaporized fuel to an internal combustion engine. Vaporizing apparatus, which uses heat generated by the internal combustion engine vaporizes the liquid fuel, and the vaporized fuel is fed to the carburetor of the engine. Means are provided for automatically supplying a vapor fuel to the carburetor as necessary to operate the engine in the absence of sufficient vaporized liquid fuel. The vapor fuel is also delivered to the engine during high acceleration or when the engine is working under very large loads. Means are also included for controlling the generation of vaporized liquid fuel in proportion to the load on the engine, and for recovering any vaporized liquid fuel and vapor fuel which is not used by the engine.Type: GrantFiled: August 20, 1984Date of Patent: August 19, 1986Inventor: Robert E. Silva
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Patent number: 4570605Abstract: A dual fuel supply for a piston engine in which there is one fuel supply means for a running fuel of low volatility and another fuel supply for a starting fuel of high volatility. The starting fuel is contained in safe scaled pressurized cartridges. The temperature of the running fuel is raised to improve its combustion characteristics.Type: GrantFiled: March 15, 1982Date of Patent: February 18, 1986Assignee: Hale Fire Pump CompanyInventor: H. Alfred Eberhardt
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Patent number: 4506649Abstract: A fuel system for a dual fuel outboard motor having a fuel connector in position to have a second connector connected to it to enable fuel to be transfered to the motor from a remote fuel tank via a hose leading to the second connector. A small tank of starting fuel is mounted on the motor and has a vent and a vent conduit leading to a valve in the motor-mounted fuel connector. The valve opens and closes the vent in response to connection and disconnection, respectively, of the connectors.Type: GrantFiled: October 3, 1983Date of Patent: March 26, 1985Assignee: Outboard Marine CorporationInventors: Paul R. Hunt, Chester G. DuBois
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Patent number: 4499862Abstract: The injection device has a nozzle body (10) wherein the liquid-controlled edle valves (17; 18) are opened by the diesel fuel supplied by an injection pump via the annular line (12) and the pressure channels (13; 14) when the opening pressure p.sub.o, which is set at the pressure springs (19; 20) by way of the pressure adjusting discs (21; 22), is reached. In this connection the two needle valves (17; 18) can be opened and closed at different times within certain limits so that at a relatively low opening pressure p.sub.o for the needle valve (17) relative to the needle valve (18) the diesel fuel issuing through the spray aperture (24) into the combustion chamber (25) serves during the entire injection period as ignition jet for the alcohol fuel issuing from one or more spray apertures (29).Type: GrantFiled: November 14, 1983Date of Patent: February 19, 1985Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Klaus Baumer, Herbert Wiegand
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Patent number: 4499864Abstract: In a method of producing fuel for start-up to an automobile internal combustion engine which is continuously operated after start-up on alcohol and/or dissociated alcohol and/or liquid hydrocarbonthe improvement comprising the steps of:(a) providing a readily replaceable first container having an initial amount of hydride therein in fluid flow communication with said internal combustion engine,(b) heating said hydride whereby hydrogen is produced leaving a hydride product and a remainder of hydridesaid remainder of hydride being lesser in amount than said initial amount of hydride,(c) initially starting said engine,whereby hydrogen is produced from the hydride for initially starting said engine and said remainder of hydride without regeneration of hydride product is available for the next starting of said engine.Type: GrantFiled: February 10, 1983Date of Patent: February 19, 1985Assignee: Conoco Inc.Inventors: Dale R. Lovercheck, George P. Curran
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Patent number: 4499861Abstract: According to the method in the two-fuel system, using diesel and alcohol l, the alcohol fuel is continuously supplied with a fuel pump and the diesel fuel is discontinuously supplied with an injection pump by way of separate lines of an injection apparatus. An apparatus, which is suitable for carrying out the method, has a nozzle body (10) with the fluid-controlled needle valves (17; 18a; 18b) which are operated after the opening pressure p.sub.o, which is adjusted at the pressure springs (19; 20a; 20b), is reached by the diesel fuel conveyed through the ring conduit (12) and the pressure channels (13; 14a; 14b), in which case the opening pressure p.sub.o for the needle valve (17) is constantly adjusted to a lower value in respect of the satellite needle valves (18a; 18b).Type: GrantFiled: November 14, 1983Date of Patent: February 19, 1985Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Herbert Wiegand, Klaus Baumer
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Patent number: 4488517Abstract: A method of cold starting an internal combustion engine operated on atomized liquid fuel after start up comprising the steps of:heating a vaporization means with an electrical resistance heating element,heating a catalytic dissociation reactor with an electrical resistance element,pumping liquid alcohol to said heated vaporization means to form a vaporized alcohol,conveying air and vaporized alcohol to said catalytic dissociation reactor wherein partial combustion of said vaporized alcohol occurs as well as dissociation of said vaporized alcohol to form a partial start up fuel mixture comprising hydrogen and carbon monoxide,pumping liquid alcohol to an atomization means to form atomized liquid alcohol,adding said partial start up fuel mixture and said atomized liquid alcohol to form a complete start up fuel mixture,conveying said complete start up fuel mixture to said internal combustion engine,starting said internal combustion engine by igniting a mixture of air and complete start up fuel mixture therewithinType: GrantFiled: April 15, 1983Date of Patent: December 18, 1984Assignee: Conoco Inc.Inventor: Heeyoung Yoon
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Patent number: 4475484Abstract: An apparatus for the catalytic transformation of fuel for use with an internal combustion engine is described. The apparatus comprises a catalytic reactor in the form of a chamber containing catalytic material, and through which liquid or vaporized fuel is passed, the reactor chamber being in close thermal communication with the exhaust gases leaving the internal combustion engine. Said reactor chamber is either placed within the exhaust gas chamber of the engine exhaust manifold, or in very close proximity thereto. In a preferred arrangement, there are two reactor chambers in series, one being formed within the exhaust manifold of the engine, and the other being mounted closely adjacent thereto.Type: GrantFiled: November 17, 1983Date of Patent: October 9, 1984Inventors: Antonio V. Filho, Pietrangelo V. De Biase
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Patent number: 4463734Abstract: A diesel engine is designed to burn on a mixture of liquid fuel or diesel, and liquefied petroleum gas, or gas. The diesel is injected into the cylinders as is conventional on diesel engines. The gas is mixed into the intake air. The output of the governor connects to a diesel control and a gas control. As more fuel is consumed, both the amount of diesel and the amount of gas is increased; however, the amount of gas is increased at a much faster rate than the amount of diesel is increased. At no load, the engine operates on about 76 percent diesel and 24 percent gas. At 100 percent load, the engine operates on about 80 percent gas and 20 percent diesel. A special gas valve is used.Type: GrantFiled: May 14, 1982Date of Patent: August 7, 1984Inventor: Richard T. Akeroyd
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Patent number: 4441467Abstract: A supplementary fuel system adds gasoline to the induction passage of an ethanol fueled engine to start and sustain operation of the engine at low temperatures. The gasoline is added during cranking of the engine and in response to a rapid increase in induction passage pressure.Type: GrantFiled: July 23, 1982Date of Patent: April 10, 1984Assignee: General Motors CorporationInventor: Thomas M. Powell
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Patent number: 4441475Abstract: A supplementary fuel system adds propane to the induction passage of an ethanol fueled engine to start and sustain operation of the engine at low temperatures. The propane flow is cycled on and off during cranking of the engine and the propane delivery pressure is varied with induction passage pressure.Type: GrantFiled: July 9, 1982Date of Patent: April 10, 1984Assignee: General Motors CorporationInventors: Patrick M. Bouchard, Jack B. King
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Patent number: 4421087Abstract: A liquid fuel injection system for an internal combustion engine in which the fuel, gaseous under ambient conditions, is injected in liquid form under compression into the intake manifold of the engine. Fuel is controlled largely by intake manifold pressure together with the RPM of the engine. Some fuel bypasses the injector, is vaporized and fed into the intake manifold through a sleeve in sufficient amounts to maintain the engine at idle and low load conditions and prevent the injector from freezing.Type: GrantFiled: February 5, 1982Date of Patent: December 20, 1983Inventor: Eiko A. Schuurman
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Patent number: 4418653Abstract: Internal combustion engine fuel treatment including in sequence the steps as follows:providing a dual catalyst reactor having a dehydration catalyst and dissociation catalystproviding alcohol,vaporing the alcohol to form alcohol vapor,dehydrating a portion of the feed alcohol vapor over the dehydration catalyst to form a first gaseous mixture including ethers, residual alcohol vapor and water,dissociating the residual alcohol vapor over the dissociation catalyst, to form a second gaseous mixture including H.sub.2 and CO,conveying the second gaseous mixture to the internal combustion engine,whereby the engine is operated on the second gaseous mixture.Type: GrantFiled: June 7, 1982Date of Patent: December 6, 1983Assignee: Conoco Inc.Inventor: Heeyoung Yoon
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Patent number: 4413594Abstract: In a method and apparatus for starting an alcohol engine equipped with a starting motor, alcohol is converted into a high-temperature gaseous mixture containing a relatively highly volatile substance. The gas is cooled to provide a liquid condensate containing the relatively highly volatile substance. The liquid condensate is supplied to the engine as fuel when the starting motor is in operation.Type: GrantFiled: January 18, 1982Date of Patent: November 8, 1983Assignee: Nissan Motor Company, LimitedInventor: Toshio Hirota
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Patent number: 4412511Abstract: An internal combustion engine is described capable of burning porous solid char fuels alone or with oil fuels. Air is forced into the char pore spaces during the compression process of the engine cycle in order to achieve the rapid burning needed for reasonable engine speeds. Fresh char fuel is periodically furnished into a combustion chamber and ashes are removed therefrom. Engine torque is controlled by control of intake air density.Type: GrantFiled: April 9, 1982Date of Patent: November 1, 1983Inventor: Joseph C. Firey
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Patent number: 4408571Abstract: Cold start-up of a engine fueled by alcohol or hydrogen dissociated from alcohol by vaporizing alcohol in a first vaporizer contacting that vapor with methanation catalyst in a methanation reactor to form methane, passing methane and alcohol delivered through a by-pass conduit to the engine, starting the engine, vaporizing alcohol in a second vaporizer to form additional alcohol vapor, contacting the additional alcohol vapor and a dissociation catalyst in a dissociation reactor to form hydrogen and carbon monoxide, conveying the hydrogen and carbon monoxide to the engine.Type: GrantFiled: June 16, 1982Date of Patent: October 11, 1983Assignee: Conoco Inc.Inventors: Robert G. Jackson, Heeyoung Yoon
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Patent number: 4408572Abstract: In a system including an alcohol fuel container, a first catalyst containing reactor, an internal combustion engine, alcohol is passed from the container through the first reactor which contains dissociation catalyst. The alcohol is dissociated in the first reactor to form a combustible gaseous mixture comprising hydrogen. The hydrogen is then fed to the engine. The improvement includes passing alcohol through a second reactor containing dehydration catalyst to form ether. Then passing that ether to the engine for start-up. Thus, the engine may be started using a mixture of ether formed in the second reactor and alcohol and then operated using hydrogen formed in the first reactor.Type: GrantFiled: June 16, 1982Date of Patent: October 11, 1983Assignee: Conoco Inc.Inventors: Heeyoung Yoon, Robert G. Jackson
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Patent number: 4402296Abstract: A method and system is disclosed for supplying an internal combustion engine with a plurality of fuels wherein a first fuel source 10 which is conventional lead-free gasoline is provided and a second source of fuel 12 which consists of from 180 to 190 proof ethanol is provided as a second fuel source. The fuels are maintained separately and are fed to the intake manifold 18 of the internal combustion engines separately and simultaneously via injection valves 34 and 36. Upon injection to the heated intake manifold, the fuels are vaporized and mixed in the vapor phase prior to combustion in the combustion chambers 32. An electric coil 46 is provided for heating the alcohol fuel and enhancing vaporization. The method also includes injecting water vapor into the combustion chamber with the gasoline and alcohol in the ratio of 0.5 to 2.5 percent and of including either Diethanolaminebenzoate, Dimethylbenzalkoniumchloride, Dicyclohexylaminenitrite, and/or Mercaptobenzothiazole as corrosion inhibitors.Type: GrantFiled: May 4, 1981Date of Patent: September 6, 1983Inventor: Walter J. Schwarz
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Patent number: 4401094Abstract: Two embodiments of dual fuel systems for internal combustion engines embodying a normal running fuel and a special fuel used for only cold starting. In each embodiment an arrangement is provided for positively cutting off the flow of starting fuel when the cold starting mode is no longer required. In one embodiment this is done automatically. Each embodiment employs an arrangement for permitting cold start enrichment with either the normal running fuel or with the special starting fuel depending upon the temperature.Type: GrantFiled: April 13, 1981Date of Patent: August 30, 1983Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Shuzaburo Shimmura, Tokuichi Hakamata, Masahiro Takemoto
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Patent number: 4399786Abstract: A method for the pilot injection of fuel in a direct injection diesel engine with a depression in the tops of the pistons. The pilot fuel, of relatively high cetane number, e.g. diesel fuel, is sprayed prior to the main spray, obliquely from the side into the piston depression in a direction counter to the rotation of the intake air. Thereafter, during the same combustion cycle, the main spray, of lower cetane number, e.g. methanol, is sprayed in a zone around the center axis of the piston depression. A substantial reduction in pollutants is achieved.Type: GrantFiled: August 25, 1980Date of Patent: August 23, 1983Assignee: AB VolvoInventor: Heinz E. A. Holmer
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Patent number: 4393854Abstract: An apparatus for supplying fuel to a combustion device has first and second tanks for storing light and heavy fuel, respectively, a third tank connected to the first and second tanks by first and second conduits, respectively, for supplying light and heavy fuel to the third tank, a third conduit connecting the third tank with the combustion device for supplying fuel from the third tank to the combustion device; a fourth conduit connecting the combustion device with the third tank for returning excess fuel from the combustion device to the third tank; a pump in the third conduit for driving fuel through the third and fourth conduits. The pump has an output flow rate that is greater than the rate of fuel consumption of the combustion device.Type: GrantFiled: February 18, 1981Date of Patent: July 19, 1983Inventor: Maurice Tacquet
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Patent number: 4387677Abstract: An auxiliary starting carburetor for internal combustion engines is provided, arranged so as to supply to the engine an auxiliary fuel, particularly in aerosol form. This carburetor comprises: a hollow rod adapted to bear on the valve of the fuel reservoir, an electromagnetic coil for actuating the rod, a chamber provided with a piston for receiving a measured amount of fuel and an outlet connected to the manifold for the fuel expelled by the piston urged by a spring.Type: GrantFiled: June 23, 1981Date of Patent: June 14, 1983Assignee: Holt Lloyd S.A.Inventor: Jean Guerrier
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Patent number: 4385676Abstract: A system for feeding a fuel to a carburetor on a motorcycle, comprising a frame on which an engine having a carburetor is mounted, a main fuel tank disposed at the front side of an upper portion of the frame for storing fuel such as alcohol therein, and an auxiliary fuel tank disposed at the rear side of the upper portion of the frame for storing fuel such as gasoline therein. The main and auxiliary fuel tanks are in communication with the carburetor through main and auxiliary fuel passages, respectively. A switch cock is provided in the main fuel passage for opening and closing thereof, and a measuring pump is interposed in the auxiliary fuel passage for supplying an auxiliary fuel at a predetermined flow rate from the auxiliary fuel tank to the carburetor. The switch cock and measuring pump are disposed at opposite sides of a lower surface of the main fuel tank. Accordingly, a driver on the motorcycle can easily reach and operate the switch cock and measuring pump in his sitting posture on the motorcycle.Type: GrantFiled: April 14, 1981Date of Patent: May 31, 1983Assignee: Honda Giken Kogyo Kabushiki KaishaInventor: Shigekazu Yoshimura
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Patent number: 4380974Abstract: A carburetor for an internal combustion engine adapted to use alcohol as fuel is provided with means for adding a predetermined amount of gasoline to the alcohol-containing float chamber of the carburetor during engine startig and warming-up, said means being controlled by the choke valve of the carburetor.Type: GrantFiled: March 24, 1981Date of Patent: April 26, 1983Assignee: Fiat Auto S.p.A.Inventor: Carlo Grosso