Other

Delphi Technologies, Inc.

Hermann Breitbach

Russell Harmon Bosch

Tsutomu Fuseya

Manfred Kolkman

Mahoro M Fujita

Rick Daniel Kerr

Charles Dale Oakley

Giulio Angel Ricci-Ottati

Terukazu Nishimura

Akihiko Minato

Shigehisa Takase

An actuator includes a piezoelectric stack within a housing that applies a compressive load to the stack. The housing may include a cylindrical tube closed at one end and may seal the stack against fluid pressure. The housing may be shorter than the length of the piezoelectric stack and may include resilient means for inducing elastic strain in the stack. The resilient means may include one or more slots extending around the circumference of the housing and/or a corrugated region of the housing to form a tension spring at a lower end of the housing. The tension spring may then serve to draw the stack into compression. The stack may include a plurality of layers of piezoelectric or piezoceramic material interspersed with a plurality of layers of electrically conductive material and connecting means for connecting the layers to a source of electrical power.

Actuator

An object of the present invention is to obtain a consistently stable needle lift damping effect in an injector for fuel injection. In an injector that relieves fuel pressure inside a pressure control chamber and lifts a needle valve there are provided a damper member that is slidably mounted to the needle valve a damping chamber formed between the damper member and the needle valve a leak passage for extracting and leaking out the fuel in the damping chamber and a stopper member to restrict the lift position of the damper member Damping of the lift of the needle valve is carried out by extracting and leaking out the fuel in the damping chamber through the leak passage The needle valve functions as a guide for the damper member and prevents vibration of the damper member allowing a consistently stable damping effect to be obtained.

Needle lift damper device of injector for fuel injection and needle lift damping method

The invention relates to an injection valve ( ) for the fuel injection in a internal combustion engine, in particular in a diesel engine. The injection valve ( ) has a holder body ( ) in which a first passage ( ) is formed. At the holder body ( ) a nozzle body ( ) of an injection nozzle ( ) is secured in which a second passage ( ) is formed which is connected to the first passage ( ) and which together with the latter forms a fuel infeed line for the injection nozzle ( ). Moreover, a closure mechanism ( ) is provided for the closing off of the injection nozzle ( ). A sleeve ( ) serves for the sealing off of the connection point between the first and the second passage ( ).

Injection valve for the fuel injection in an internal combustion engine

The invention relates to a switching valve ( ) comprising a valve body ( ) in which a flow passage ( ) is formed which opens with its one end into a work space ( ). A valve plate ( ) is accommodated in the work space ( ) and can be moved between a closure position and an opening position. A closure element ( ) is arranged between the valve plate ( ) and the opening ( ) of the flow passage ( ) and closes the latter when the valve plate ( ) is located in its closure position.

Switching valve

The invention relates to a fuel injection apparatus, in particular for diesel engines, comprising at least one injection nozzle which is connected to a fuel pressure line and which has a nozzle element which can be actuated through a control unit for the opening and the closing of the injection nozzle, with the control unit comprising a piston which is displaceably journalled in a control passage, which is coupled at its one end to the nozzle element and which bounds with its other end together with a plug which is arranged in the control passage a pressure chamber which can be connected up to the fuel pressure line via a supply passage and which communicates with an outflow passage, with it being possible to vary the pressure in the pressure chamber through the release or the interruption of the flow through the outflow passage for the actuation of the nozzle element when the pressure chamber is connected via the supply passage to the fuel pressure line, and with it being possible to influence the flow through the supply passage into the pressure chamber and the flow out of the pressure chamber into the outflow passage through a displacement of the piston as a result of a pressure change in the pressure chamber.

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Crauthem, Luxembourg

Hermann Breitbach