摘要:
A combined fuel injection and spark ignition device (40) adapted to be received in an opening to a combustion chamber of an internal combustion engine for injection of fuel into the chamber, the device comprising a passageway (60) through which fuel may pass to enter the chamber, the passageway (60) incorporating valve means (48, 56, 58) to control flow of fuel therethrough and terminating in an electrically conductive nozzle (70) associated with means (82) shaped to deliver injected fuel as a coniform layer (80) directed along the longest possible path before intersecting a surface of the combustion chamber, the device further comprising means (68, 70, 82, 84) for effecting spark ignition of the coniform fuel spray substantially at the location of its injection into the chamber.
摘要:
A fuel delivery system for supplying liquid gas fuel to an engine is disclosed. The fuel can be supplied solely to the engine or together with diesel fuel. The fuel delivery system includes an injector (20) for receiving the liquid gas, and for ejecting the liquid gas in vapour form to the engine E. A bubble preventing mechanism (40, 44, 48; 8, 203, 209, 208) is supplied for preventing the liquid gas from bubbling or boiling in the injector which would impair the ejection of fuel from the injector. The preventing means comprises cooling means which may use a coolant to cool the injector. In one embodiment, the coolant is in the form of bubbled vapour which is directed away from the injector (20) and enters a chamber (206) in which the injector (20) is located, so that the vapour cools the injector (20). The vapour (20) can pass to a vapour block (208) for supply to the intake air of the engine so the vapour is supplied back to the engine together with fuel ejected by the injector (20).
摘要:
A multipoint fuel delivery system for an internal combustion engine includes fuel metering device(s) such as fuel injector(s) associated for selectively controlled injection of the second fuel to corresponding combustion chamber(s) of the internal combustion engine. A fuel supply manifold associates with fuel injector(s) for directing the second fuel to each fuel injector. An intake port adaptor mechanism adapts the intake port of the associated combustion chamber to receive the selectively controlled injection of the fuel from an associated fuel injector. The intake port adaptor mechanism may also engage the intake port so as to permit selective flow of the first fuel or the second fuel to the intake port of the selected combustion chamber. A control mechanism selectively controls the flow of the second fuel through each injector(s). The multipoint fuel delivery system make practical both dedicated or single-fuel multipoint injection and, alternatively, selective bi-fuel multipoint injection for an internal combustion engine.
摘要:
A LPG injection system for an internal combustion engines comprises a return conduit (6) which takes the LPG fed in excess to the injectors (2) back to the tank (5). In the return conduit (6) there is not interposed any pressure regulator. Furthermore this conduit (6) ends with a non-return valve (7) which prevents a flow within conduit (6) towards the rail (1) for feeding the LPG to the injectors (2).
摘要:
A fuel supply system for a single or multi-cylinder internal combustion engine (1) of the compression ignition kind (eg a diesel engine) and including a liquid fuel injection means (2) for injecting liquid fuel into the combustion chamber(s) of the engine (1); the system employing a main supply source of liquid alcohol fuel (4) such as methanol as the principal fuel for the engine and an ether pilot fuel having a wider flammability range and lower ignition temperature than the principal alcohol fuel. Prescribed quantities of the ether pilot fuel are arranged to be delivered to the engine (1) during operation for mixing with the principal fuel (4) and ignition of the delivered pilot fuel to raise the temperature of the fuel mixture in the combustion chamber(s) sufficiently to enable full ignition under compression of the principal fuel. The system preferably including means for producing the ether pilot fuel from a bye-pass supply (7,8,9) of the principal liquid alcohol fuel (4) by way of a heat exchanger/catalytic convertor device 10; and including a condensation means (16,18) for removal of at least a part of any readily condensible content of the pilot fuel before delivery to the engine (1) to permit ignition under compression of the delivered pilot fuel.
摘要:
Disclosed is a device for operating a combustion engine (7) on both petrol and LPG comprising a chamber (9) arranged in front of the gas valve and accommodating a valve (12) which can be adjusted during operation by the combustion air flow through the chamber for influencing the amount of petrol fed to the engine, whereby for LPG operatidn said valve can be fixed in a position in which the valve does not adversely affect the combustion air flow.
摘要:
An attachment for operating an internal combustion engine (10) on either gaseous or liquid fuel incorporates a modified air cleaner-intake assembly (20) having spaced cover (38) and adapter (21, 27) plates between which is sandwiched a typical annular filter element (33). An annular diaphragm (51) connects an inner plate (53) to the cover plate (38) to form a chamber (62) therewith on one side of the inner plate (53) into which gaseous fuel is admitted. During gaseous fuel operation gas pressure in the chamber (62) maintains the inner plate (53) adjacent the adapter plate (27) to form therewith an annular venturi (58) into which gaseous fuel from the chamber (62) is admitted through a ring of ports (63) through the inner plate (53) at the venturi (58). During liquid fuel operation incoming air lowers the pressure in the chamber (62) sufficiently so that the inner plate (53) automatically moves away from the adapter plate (27) to provide an unobstructed air only path to the engine (10).
摘要:
Exhaust system for a dual-fuel engine that is provided with a first fuel and a second fuel. The exhaust system includes an exhaust passageway, with an exhaust treatment component provided in the exhaust passageway. A thermal enhancement device communicates with the exhaust passageway and is located upstream from the exhaust treatment component, wherein the thermal enhancement device is operable to raise a temperature of an exhaust located in the exhaust passageway during a switch between the first fuel and the second fuel that is provided to the dual-fuel engine. The exhaust treatment system can also include a by-pass pipe in communication with the exhaust passageway that by-passes the exhaust treatment component, wherein during combustion of the first fuel by the dual-fuel engine, the by-pass pipe is open. During combustion of the second fuel by the dual-fuel engine, the by-pass pipe is closed.
摘要:
A method for fuelling an internal combustion engine, and a fuel system for delivering a variety of fuel types to the engine, configured to accommodate liquid fuels such as gasoline, ethanol or a blend thereof, and gaseous fuels such as CNG, LNG or LPG. The engine is configured to operate on any of the designated liquid fuels, and can switch between the liquid and gaseous fuels. The fuel system includes a common delivery arrangement, for selectively delivering fuel into the combustion chamber of each cylinder of the engine, comprising a fluid delivery injector and a liquid metering device configured for operation in concert. The same common fluid delivery injector is used for delivery of gaseous fuel only, delivery of liquid fuel only (by way of an air assist delivery process), or delivery of a fuel mixture comprising the gaseous fuel and the liquid fuel.