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Device to attach a fuel return line to a fuel injector and device to suction fuel from a fuel injector
A device to suction fuel from a fuel injector and a device to attach a fuel return line to a fuel injector with a C-shaped main body partially encircling the fuel injector having two retaining arms which abut the fuel injector and grip it from the back at least to a small degree, with a connector coacting with a drain passage of the fuel injector and at least one connecting fitting for the fuel return line. The connecting fitting and the connector are fluidically connected. The free ends of the retaining arms have a first section in which they are angled towards each other and towards the base of the main body.

Fuel vapor treatment system for internal combustion engine
A fuel vapor treatment system includes a three-position valve for switching between a first measuring state and a second measuring state, and a pressure sensor for measuring pressure produced by a restriction in a measurement line. In the first measuring state, air flows through the measurement line. In the second measuring state, air-fuel mixture flows through the measurement line. The behavior of change in a first pressure in the first measuring state and the behavior of change in a second pressure in the second measuring state are measured. When that the behaviors of change in the first and second pressures are substantially identical to each other, it is determined that an abnormality occurs in an operation of switching the three-position valve.

Control device of fuel system of internal combustion engine
An engine control device executes a mechanism of controlling a fuel system during idling including the step of detecting an engine speed NE and an engine load, the step of determining whether fuel can be injected at normal feed pressure from an in-cylinder injector during idling, the step of detecting or estimating a fuel temperature T in a high-pressure delivery pipe, the step of stopping the high-pressure fuel pump and injecting fuel from the in-cylinder injector at the normal feed pressure when the fuel temperature T is not greater than T( 0 ), the step of stopping the high-pressure fuel pump and injecting fuel at the pressure greater than the normal feed pressure when the fuel temperature T is greater than T( 0 ) and not greater than T( 1 ), and the step of driving the high-pressure fuel pump to inject the fuel at high pressure when the fuel temperature T is greater than T( 1 ).

Fuel injector with directly controlled highly efficient nozzle assembly and fuel system using same
Reducing leakage within fuel injectors is one way in which the efficiency of the overall fuel injection system can be improved. In most fuel injectors that include a direct control needle valve, the needle valve member is still biased toward a closed position by a spring that is located in a spring chamber connected to a low pressure vent. In many instances, the needle valve member is guided in a tight clearance region adjacent the spring chamber. Since the internal plumbing of the fuel injector is connected to a high pressure rail during and between injection events, static leakage across the guide region of the needle valve member can reduce efficiency. Static leakage is reduced in the present invention by connecting the spring chamber to the common rail instead of to a low pressure vent. Such a fuel injector could find potential application in any directly controlled fuel injection system, but is particularly applicable in common rail systems in which the fuel injector remains fully pressurized between injection events.

Two-stroke engine with fuel injection
A two-stroke internal combustion engine is provided with a fuel injector. The two-stroke internal combustion engine may have at least one transfer passage, an air channel, and a fuel injector. The transfer passage is between a crankcase and a combustion chamber of the engine. The air channel is in gaseous communication with a top portion of the transfer channel. The fuel injector is in gaseous communication with the air channel and injects fuel into the air channel. The two-stroke engine may be used on hand-held, lawn and garden equipment.

Method for operating an internal combustion engine
An internal combustion engine includes multiple combustion chambers. The supply of fuel into at least one subset of the combustion chambers can temporarily be interrupted. It is provided that the fuel be injected into the combustion chambers directly and during a switchover phase for interrupting or resuming fuel injection into the subset of combustion chambers, at least temporarily via multiple injections.

Direct-injection spark-ignition internal combustion engine
When an engine is in transitional operation, combustion is carried out by spray guide method. Further, when catalyst temperature T is high, namely, equal to or higher than a specified maximum temperature T 1 , stratified charge combustion by spray guide method is carried out, and when the catalyst temperature T is low, namely, equal to or lower than a specified minimum temperature T 2 , stratified charge combustion by wall guide method is carried out.

Two-stroke engine
A two-stroke engine has a cylinder with a combustion chamber that is delimited by a reciprocating piston that drives with a connecting rod a crankshaft rotatably supported in a crankcase. In predetermined positions of the piston, the crankcase is connected by at least one transfer channel to the combustion chamber. The two-stroke engine has a mixture channel for supplying a fuel/air mixture and an air channel that supplies substantially fuel-free air to the transfer channel. In order to provide a simple adjustment of the air channel to different two-stroke engines of a model range, a component in which the air channel is formed has a throttle member that is arranged at an end face of the component. The throttle member throttles the air flow through the air channel in at least one operating state of the two-stroke engine.

Power air-fuel levitation compression
Apparatus for magnetically conditioning incoming air and fuel to an internal combustion engine to improve engine operation. Magnets are applied in a bipolar arrangement to the fuel system and air intake apparatus of an internal combustion engine system for reducing emissions and improving fuel efficiency. Magnets may also be applied in a bipolar arrangement to the exhaust system and catalytic converter of an internal combustion system of automotive type for reducing exhaust emissions and improving the performance of a catalytic converter. Furthermore, a combination of magnetizing apparatus that, in conjunction with air and fuel magnetizing apparatus, will improve engine efficiency by introducing a magnetic charge to engine exhaust, coolant water, engine oil, transmission fluid, and gear box fluid, in combination with the above embodiment.

Fuel injection valve installation structure of engine
To effectively reduce operational noise generated by vibration of the fuel injection valve with a fuel injection valve installation structure of an engine. In the structure, an installation hole is formed in an engine component member that constitutes a part of an engine. The installation hole has an annular shoulder portion, which is formed in the middle portion thereof, and which faces the exterior side. The fuel injection valve is held between the annular shoulder portion and a supporting member attached to the engine component member. A first damper, with high vibration-damping properties, is set between an annular shoulder portion and a fuel injection valve. A second damper, with high vibration-damping quality, is set between a supporting member and the fuel injection valve.