摘要:
An actuator arrangement comprising a piezoelectric element (22) formed from a piezoelectric material, a first end of the piezoelectric element (22) cooperating with an input piston member (24) slidable within a bore (26). A surface associated with the input piston member (24) defines, in part, a control chamber (32) for fluid, fluid pressure within the control chamber (32) acting on a surface associated with an output piston member (30). The fluid within the control chamber (32) is substantially incompressible such that, in use, movement of the input piston member (24) is transmitted to the output piston member (30), the piezoelectric element (22) being arranged within a second chamber (23) for fluid such that fluid pressure within the second chamber (23) exerts a force on at least a part of the surface of the piezoelectric element (22) which serves to oppose the load exerted on the piezoelectric element (22) due to fluid pressure within the control chamber (32), thereby suppressing distortions in the piezoelectric material.
摘要:
A fuel injection valve for high pressure injection of fuel from a high-pressure central fuel tank (1) into the combustion chambers of an internal combustion engine. The high pressure fuel tank (1) interacts with a control chamber via an inlet throttle hole (10), whereby said control chamber controls the opening and closing of the injector nozzle and the control chamber (20) communicates with a switch valve via an outlet throttle hole (30). The inlet throttle hole (10) is oriented in an eccentric position with respect to the control chamber (20).
摘要:
The invention features a device for injecting high pressure atomised fuel liquid into the combustion chamber of an internal combustion engine comprising means for delivering high pressure liquid fuel (16) such as a pump communicating, via cyclic communication means with an injection chamber (26) of variable volume with a movable element (27) returned by resilient returning means (28) towards a stop (33) and communicating permanently with the nozzle cavity (10), the amount of liquid fuel being delivered to the injection chamber during the cyclic closing phase of the nozzle obturating means (14). This invention is useful for diesel engines.
摘要:
A fuel injection control device comprising a fuel injector driven by a piezoelectric element. The piezoelectric element is charged with a electrons by using an LC resonant circuit, and the electrons charged in the piezoelectric element are discharged by using an LC resonant circuit. The piezoelectric element is driven before the regular injection is begun.
摘要:
A fuel injection control device comprising a fuel injector driven by a piezoelectric element. The piezoelectric element is charged with a electrons by using an LC resonant circuit, and the electrons charged in the piezoelectric element are discharged by using an LC resonant circuit. The piezoelectric element is driven before the regular injection is begun.
摘要:
Das Einspritzventil weist einen Ventilkörper (l,2,3) auf, der in seinem Innern eine Ventilnadel (9) und in seiner Wand einen Brennstoffzufuhrkanal (l4,l6) sowie auf zwei verschiedenen Höhen Spritzlöcher (7,8) enthält. Die Ventil nadel (9) weist einen vom Brennzufuhrstoffkanal (l4,l6) ausgehenden, sich durch die Ventilnadel erstreckenden und in deren brennraumseitige Stirnfläche zwischen die beiden Spritzlöcher (7,8) mündenden Kanal (l8,l9,20) auf. Inner halb der Wand des Ventilkörpers (l,2,3) ist eine mit dem Brennstoffzufuhrkanal (l4,l6) kommunizierende, zur Ventil nadel (9) koaxiale Ringnut (l5) vorgesehen, die sich etwa über die dem Brennraum (6) abgewendete Hälfte der axialen Länge der Ventilnadel erstreckt. Das im Ventilkörper (l,2, 3) höher gelegene Spritzloch (8) zweigt im zylindrischen Abschnitt der die Ventilnadel (9) führenden Bohrung (l0) im Ventilkörper ab. Zwischen dieser Abzweigstelle und dem mit der Ventilnadel (9) zusammenwirkenden Ventilsitz be steht ein axialer Abstand (d). Durch diese Konstruktion wird es möglich, mit nur einer Ventilnadel den einzuspritzenden Brennstoff entweder nur den auf einer Höhe befindlichen Spritzlöchern oder den auf beiden Höhen befindlichen Spritzlöchern zuzuführen.
摘要:
The invention relates to an injection system (1), a control unit (16) and a method for controlling the quantity of fuel injected into an internal combustion engine, wherein said system (1) comprises at least one injector (14), an injection duct (141) adapted to feed said injector (14), a fuel rail (13) in fluidic communication with said injector (14) via said injection duct (141), an injection pump (11) for feeding the fuel rail (13), sensor means (2) positioned upstream or downstream of said fuel rail (13) and capable of detecting at least one property of a fuel flow entering or exiting said injector (14), a control unit (16) for activating said injector (14) on the basis of said at least one property, so as to control the flow rate and/or the mass of fuel injected into the engine.
摘要:
The invention relates to an injection nozzle (1) for fuels, comprising a nozzle body (2), in which a pressure chamber (4) that can be filled with fuel under high pressure is formed, in which pressure chamber a piston-shaped nozzle needle (3) is arranged in such a way that the nozzle needle can be moved longitudinally. A sealing surface (6) is formed at one end of the nozzle needle (3) and an end face (9) is formed at the opposite end, wherein the sealing surface (6) interacts with a nozzle seat (5) in order to open and close at least one injection opening (8). A control chamber (10) that can be filled with fuel under changing pressure is bounded by the end face (9) of the nozzle needle (3) such that a force can be applied to the end face (9) in the direction of the nozzle seat (5) by means of the hydraulic pressure. The nozzle needle (3) has an elastic longitudinal segment (25), which has a longitudinal stiffness of less than 40,000 N/mm.