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Class 123/577 - Fuel switched, condition responsive to load


Subclass of Class 123 - Internal-combustion engines
Definition: Subject matter wherein the separate fuel supplies are switched
No. of patents: 63
Last issue date: 05/22/2012


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NumberTitleIssue Date
8181636Bi-fuel engine using hydrogen
A method is disclosed for making a transition from fueling an engine with hydrogen to another fuel. That other fuel may be gasoline, a gasoline and alcohol mixture, or gaseous fuels, as examples. The other fuel has the capability of providing higher BMEP than the hy...
05/22/2012
7802562Engine boost control for multi-fuel engine
A fuel delivery system for an internal combustion engine and a method of operating the fuel delivery system is described. As one example, the method includes delivering a first fuel blend from a first fuel tank to the engine; delivering a second fuel blend from a se...
09/28/2010
7367312Control strategy to better usage of fuel in gaseous engine
A method for operating a fueling system in a vehicle having an engine capable of burning gaseous fuel supplied from at least a first and second source to a direct fuel injector of the engine, the first source having a higher source pressure than the second source, t...
05/06/2008
6990955Spark ignition engine
There is provided a spark ignition engine having a low RON fuel tank to store a low RON fuel and a high RON fuel tank to store a high RON fuel, which can detect storage failure. It is judged that the two kinds of fuels are properly stored when differences between th...
01/31/2006
6978616Hybrid piston-pulsed detonation engine
A hybrid piston engine-pulsed detonation engine structure is provided for obtaining shaft power from a pulsed detonation engine wherein a piston engine operatively connected to a PDE. A deflagration to detonation transition is used to achieve detonations. The piston...
12/27/2005
6332448Fuel supply apparatus of internal combustion engine
In a fuel supply device which supplies fuel in a main tank (8) to a vehicle engine (20), a fractional distiller (9) fractionates the fuel in the main tank (8) into a high octane fuel component and a low octane fuel component, and stores these fuel compone...
12/25/2001
6289881Conversion system with electronic controller for utilization of gaseous fuels in spark ignition engines
A conversion system for converting a spark ignition engine to operate on gaseous fuel is disclosed. The conversion system includes an electronic controller which operates on several novel principles to provide superior performance/responsiveness and to re...
09/18/2001
6145494Conversion system with electronic controller for utilization of gaseous fuels in spark ignition engines
A conversion system for converting a spark ignition engine to operate on gaseous fuel is disclosed. The conversion system includes an electronic controller which operates on several novel principles to provide superior performance/responsiveness and to re...
11/14/2000
6135426Priming system for internal combustion engines
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...
10/24/2000
5224457Dual fuel electronic control system
A dual fuel system for a diesel engine includes a liquid (diesel) fuel injection system controlled by an engine electronic control unit (ECU) and a source of gaseous fuel such as natural gas. A metering valve and a mixer controls introduction of gaseous f...
07/06/1993
5117802Dual fuel system for combustion engines
A system is described that extends the driving range provided in prior art by compressed gas fuel systems and that thereby reduces the need for bi-fuel operating capability in most applications. The system can typically more than double the energy density...
06/02/1992
5018503Fuel increasing system for engine
A fuel increasing system for an internal combustion engine having a normal charge forming system with a plurality of carburetors. A supplemental fuel supplying system is incorporated that draws fuel from the fuel bowl of one of the carburetors to a supple...
05/28/1991
5010868Gas-phase propane fuel delivery system
A gas phase fuel delivery system is provided for delivering a vapor phase fuel to a regulator independent of fuel tank temperatures, the system comprises a storage tank for storing a fuel, such as liquid phase propane, and a regulator in fluid communicati...
04/30/1991
4955326Low emission dual fuel engine and method of operating same
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 s...
09/11/1990
4924822Gas feed system for a gas-fired diesel engine
An improved gas feed system for a gas fired diesel engine is disclosed, in which boil-off gas evaporated from liquefied gas is fed to the diesel engine. The improvements reside in that between the diesel engine and a liquefied gas tank for storing a gaseo...
05/15/1990
4878475Fuel supply system for internal combustion engines
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 wor...
11/07/1989
4876988Combined fuel engine
A combined fuel engine for reduced emission pollution in which the engine is provided with a conventional fuel injection system for injecting a conventional fuel such as gasoline or diesel oil high in carbon into a combustion chamber proximate the cycle t...
10/31/1989
4813390Air gas mixing device with valve position detector
An air-gas mixing device of the type used to mix air and gaseous fuel as a gaseous fuel charge for an internal combustion engine and having air and gaseous fuel valves for controlling the air-fuel mixture. For more optimum control of the air-fuel mixture,...
03/21/1989
4757796Carburetor/mixing chamber and dual throttle control and cold starting apparatus for gasoline engine
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...
07/19/1988
4703742Air-gas mixing device with dual-control fuel valve
An air-gas mixing device of the type used to mix air and gaseous fuel as a gaseous fuel charge for an internal combustion engine and particularly suitable for use with engines operating generators and the like at constant speed. Fuel and air valves for co...
11/03/1987
4674465Carburator/mixing chamber and dual throttle control apparatus for gasoline engine
An apparatus including a mixing chamber is installed between the base of a standard carburator 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 cha...
06/23/1987
4632083Injection unit for internal combustion engines fed with gaseous fuels such as liquefied petroleum gas or methane
A gaseous fuel injection unit for internal combustion engines fed with gaseous fuel such as liquefied petroleum gas or methane, comprises at least one volumetric measuring device (7) arranged to feed during each engine cycle a determined volume related to...
12/30/1986
4597364Fuel control system for gaseous fueled engines
In a diesel engine, the improvement of a fuel control system for use in providing a timed supply of gaseous fuel from a high pressure source to each air input. The control system comprises a flow control valve associated with each air input, the flow cont...
07/01/1986
4574763Dual fuel carburetion system and method
A dual fuel system for use with internal combustion engines comprising (a) a manually actuated dual fuel valve, (b) a liquified gas to gaseous fuel converter combining a liquified fuel lock-off valve responsive to engine vacuum and a fuel metering valve r...
03/11/1986
4553519Propane feeding device for internal combustion engines
A system for simultaneously injecting propane and gasoline into an internal combustion engine. A propane supply reservoir is connected to the engine carburetor by a first line. A metering valve is positioned in the first line and has a vacuum responsive v...
11/19/1985
4545356Liquified petroleum gas carburetor
A liquified petroleum gas carburetor (12) receiving LPG as a liquid and through a pair of pressure regulators (20, 30) and a heat exchanger (22) reducing the liquid to a vapor for ingesting into the engine (8). The heat exchanger (22) is mounted integral ...
10/08/1985
4541397Gaseous fuel carburetion system
In a gaseous fuel carburetion system in which air and gaseous fuel are mixed in a mixer prior to induction into an internal combustion engine, and in which the rate of flow of the induction air is controlled by throttling the intake of the air/fuel mixtur...
09/17/1985
4524730Method for improving fuel efficiency and reduced emissions in internal combustion engines
A system for improving the efficiency of an internal combustion engine, and thereby improving fuel economy while reducing emissions is disclosed, which comprises providing a stream of vaporized fuel from a vaporization chamber to the air intake stream of ...
06/25/1985
4520766Dual fuel valve
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 governo...
06/04/1985
4518540Multi-fuel carburetor
An improved two-barrel, multi-fuel carburetor. The carburetor comprises a main body portion in which the main fuel bowl is positioned and an auxiliary body portion in which an auxiliary fuel bowl is positioned. All of the fuel and air passages extending b...
05/21/1985
4517928System for the use of gas as secondary fuel in diesel engines
A system for use of gas, like LPG, as secondary fuel in diesel engines is concerned. Normally aspirated and pressure charged engines with exhaust gas driven charging, with End-speed or All-speed governors or with common-rail-fuel injection systems are all...
05/21/1985
4506649Vent system
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 st...
03/26/1985
4505249Fuel control system for gaseous fueled engines
A fuel control system for use in supplying gaseous fuel from a high pressure source to an internal combustion engine which has an air/fuel intake through which air and gaseous fuel is supplied to the engine and an air/fuel intake manifold in which variati...
03/19/1985
4492207Dual fuel system
A dual fuel system for use with internal combustion engines comprising a manually actuated dual fluid valve which alternatively supplies gasoline to the engine's carburetor or engine intake manifold vacuum to a single-stage liquified gas to gaseous fuel c...
01/08/1985
4476818Constant air feed alcohol dissociation process for automobiles
A method of fuel treatment and distribution for an internal combustion engine including the sequence of steps as follows: (a) heating a catalyst bed reactor to a start-up temperature using exhaust gas from an internal combustion engine being operated on atomiz...
10/16/1984
4471744Process and unit for operating a combustion engine aboard ships
A process for the preparation of a diesel oil--heavy oil mixture for use as an engine fuel includes the steps combining the two oils proximate the engine, heating the mixture to obtain the required overall fuel viscosity and continuously supplying the hea...
09/18/1984
4465052Metering device for gaseous propellant
The invention relates to a metering device for gaseous propellant for internal combustion engines. The invention resides in the device comprising a slit means (40) through which the gas flows, and a means (45, 47, 49 or 45, 47, 68, respectively) for cover...
08/14/1984
4463734Dual fuel diesel engine
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 governo...
08/07/1984
4462944Carburetor with rotary mixing valve
A mixing valve receives primary and auxiliary fuel flows within a valve mixing chamber of arcuate shape. Primary and auxiliary valve components are coaxially and rotatably disposed in the valve housing with each including a flow control arm which regulate...
07/31/1984
4449509Gaseous fuel carburetion
In a gaseous fuel carburetion system in which air and gaseous fuel are mixed in a mixer prior to induction into an internal combustion engine, and in which the rate of flow of the induction air is controlled by throttling the intake of the air/fuel mixtur...
05/22/1984
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