摘要:
The present disclosure is directed to injectors with integrated igniters providing efficient injection, ignition, and complete combustion of various types of fuels. These integrated injectors/igniters can include, for example, insulators with adequate mechanical and dielectric strength to enable high-energy plasma generation by components that have very small dimensions, multifunction valving that is moved to injector multiple bursts of fuel and to induce plasma projection, a fuel control valve at the interface to the combustion chamber for the purpose of eliminating fuel drip at undesired times, and one or more components at the interface of the combustion chamber for the purpose of blocking transmission of combustion sourced pressure.
摘要:
When a control valve allows communication through a fuel drain channel, fuel flows into an inner control chamber from an outer control chamber through a communication channel and flows out to a fuel tank. The fuel flow through the communication channel generates a differential pressure between inner control pressure and outer control pressure. Thus, an outer differential pressure immediately after an outer valve opening time can be set small, restraining an increase in the unburnt HC content of exhaust gas at low load, which could otherwise result from a high rising speed of an outer needle valve immediately after the outer valve opening time. An inner differential pressure immediately after an inner valve opening time can be set large, restraining an increase in the smoke content of exhaust gas, which could result from a low rising speed of an inner needle valve immediately after the inner valve opening time.
摘要:
A dual fuel injector may be used to injector both gas and liquid fuel into a cylinder of a compression ignition engine. An injector body defines a first set of nozzle outlets, a second set of nozzle outlets, a first fuel inlet and a second fuel inlet. A dual solenoid actuator includes a first armature, a first coil, a second armature, a second coil and a lever. The dual solenoid actuator has a non-injection configuration at which the first armature is in an un-energized position, the second armature is at un-energized position and the lever is at a first angular orientation. A dual solenoid actuator has a first fuel injection configuration at which the first fuel inlet is fluidly connected to the first set of nozzle outlets, the first armature is at an energized position, the second armature is at the un-energized position and the lever is at the first angular orientation. The dual solenoid actuator has a second fuel injection configuration at which the second fuel inlet is fluidly connected to the second set of nozzle outlets, the first armature is at the un-energized position, the second armature is at an energized position and the lever is at a second angular orientation. The dual solenoid actuator may also include a combined fuel injection configuration.
摘要:
This nozzle assembly (1) comprises a first needle (11) and a second needle (12) controlling respectively fuel flow towards a first series of outlets (213) and a second series of outlets (223). It includes a passive control valve (18) adapted to select, on the basis of the fuel feeding pressure, the needle (11 or 12) to he activated for fuel delivery to the combustion chamber of an internal combustion engine. An injector with such an assembly is economic and efficient to spray fuel with two different patterns.
摘要:
A tubular outer needle 42 is slidably housed in a body 41 such that the outer needle can communicate nozzle and suck chambers R1 and R2 with each other and shut them from each other, and defines the nozzle and suck chambers R1 and R3. A rod-like inner needle 43 is coaxially slidably housed in the outer needle 42, and the tip end portion thereof moves into the suck chamber R2 at its lowermost position. In the range of the small inner lift amount, an annular clearance is formed between an inner peripheral surface of an inner side wall defining the suck chamber R2 and an outer peripheral surface of an outer side wall of the tip end portion of the inner needle 43. Outer and inner lift amounts are regulated such that when the fuel injection is started, the outer and inner lift amounts simultaneously increase from zero while when the fuel injection is terminated, the inner lift amount returns to zero after the outer lift amount returns zero.
摘要:
A control device (5) for an internal combustion engine including a fuel injection device (3) is provided. The fuel injection device (3) includes an injection hole (31b, 31c), and is configured to inject fuel from the injection hole (31b, 31c) into a combustion chamber (21). The control device (5) includes an actual injection amount output section (53), an injection amount deviation output section (51a), and an abnormality treatment direction section (51a). The injection amount deviation output section (51a) outputs a signal that indicates the deviation between an actual injection amount and a command fuel injection amount. The abnormality treatment direction section (51a) outputs a signal to enable treatment if the deviation exceeds a predetermined value.
摘要:
A fuel injector having an injector body defining a hollow interior configured to receive pressurized fuel, a first nozzle configured for providing a first fuel spray pattern, and a second nozzle configured for providing a second fuel spray pattern different from the first fuel spray pattern. The first and second nozzles may be configured to inject fuel supplied from a common source into a combustion space. The fuel injector may further include first and second needle valve members corresponding to the first and second nozzles, respectively. The first and second needle valve members may be positioned within the hollow interior of the injector body, with the second needle valve member being spaced from, but adjacent to the first needle valve member.
摘要:
An injection nozzle (4) for an internal combustion engine, the injection nozzle (4) including a nozzle body (6) provided with a bore (8) defining a valve seating surface, and having a first nozzle outlet and a second nozzle outlet, a first delivery chamber upstream of said nozzle outlets, an outer valve member, moveable within the bore (8) and itself provided with an axial bore (8), wherein the outer valve member is engageable with an outer valve seat defined by the valve seating surface so as to control fuel flow from a first delivery chamber to at least the first nozzle outlet when the outer valve member lifts from its seat. The injection nozzle (4) also includes an inner valve member, moveable within the axial bore (8) and including first and second seating lines spaced apart axially from each other, both seating lines being engageable with an inner valve seat defined by the valve seating surface so as to control fuel flow from a second delivery chamber to the second nozzle outlet when the inner valve member lifts from inner valve seat. The inner valve member defines, at least in part, a flow path including an axial passage provided in the inner valve needle such that fuel may flow from the first delivery chamber to the second delivery chamber.
摘要:
In a multi-stage fuel-injection internal combustion engine employing a fuel injection system and a variable valve actuation system, engine valve timings are variably controlled depending on engine operating conditions. An electronic engine control unit is configured to execute cooperative control of the timing of sub-injection, injected before main injection, responsively to intake valve closure timing, and also to execute cooperative control of the timing of sub-injection, injected after the-main injection, responsively to exhaust valve open timing.
摘要:
A fuel injection system deliberately utilizing after injection so as to improve the engine combustion and reduce soot and NOx, wherein at least one operating valve is provided for operating a first injection port group and second injection port group, after injection is performed consecutively after main injection in a high load region, fuel is injected from the first injection port group and second injection port group at the time of main injection, fuel is injected from the first injection port group at the time of after injection, the actual injection pressure near the first injection port during the after injection period is higher than the actual injection pressure near the first injection port during the main injection period, the operating valve opens the first injection port group to start the injection, then the operating valve opens the second injection port group simultaneously or in a short time as well to perform the main injection, the operating valve closes the second injection port group, then performs the after injection, and the operating valve closes the first injection port group and ends the injection after the elapse of a time longer than simultaneously or a short time from after start of after injection.