Abstract: An injector has an injector needle (2) by means of which an outlet opening (4) of an injector housing (1) can be closed. The injector needle (2) can be adjusted in pressure-controlled fashion from a closed position into an open position. The injector needle (2) is axially fixedly connected to a piston (26) which is under closing pressure in one direction so that the injector needle (2) closes the outlet opening (4). In the other direction, the piston (26) and thus the injector needle (2) can be displaced by a valve-controlled control pressure, whereby the injector needle (2) passes into its open position and releases the outlet opening (4).

Abstract: A pump for a SCR system in vehicles which includes a housing in which at least one pump element is arranged which is activated by a eccentric drive and has at least one a pump piston. The at least one pump piston includes at least a spring bellow which is elastically deformable during pump operation.

Abstract: The disclosure relates 10 a device which is used to adjust the valve stroke of internal combustion engines and has an actuation element for the valve stem. The actuation element is actuated by the camshaft and has a receiving space for a pressure medium. The receiving space is fluidically connected to a reservoir space of an adjustment reservoir. The volume of the reservoir space can be adjusted by means of a reservoir piston. The reservoir piston is loaded toward the reservoir space with a force that is greater than the force applied by the pressure medium and that is less than the restoring force acting on the piston.

Abstract: The disclosure relates 10 a device which is used to adjust the valve stroke of internal combustion engines and has an actuation element for the valve stem. The actuation element is actuated by the camshaft and has a receiving space for a pressure medium. The receiving space is fluidically connected to a reservoir space of an adjustment reservoir. The volume of the reservoir space can be adjusted by means of a reservoir piston. The reservoir piston is loaded toward the reservoir space with a force that is greater than the force applied by the pressure medium and that is less than the restoring force acting on the piston.

Abstract: A pump for a SCR system in vehicles which includes a housing in which at least one pump element is arranged which is activated by a eccentric drive and has at least one a pump piston. The at least one pump piston includes at least a spring bellow which is elastically deformable during pump operation.

Abstract: A pump for a SCR system in vehicles which includes a housing in which at least one pump element is arranged which is activated by a eccentric drive and has at least one a pump piston. The at least one pump piston includes at least a spring bellow which is elastically deformable during pump operation.

Abstract: A pump for a SCR system in vehicles which includes a housing in which at least one pump element is arranged which is activated by a eccentric drive and has at least one a pump piston. The at least one pump piston includes at least a spring bellow which is elastically deformable during pump operation.

Abstract: A control valve includes a main body, the first coil assembly arranged on the first side of the main body and having the first contact surface and the first through hole extending from the first contact surface, the second coil assembly arranged on the second side of the main body and having the second contact surface and the second through hole extending from the second contact surface, and a spool arranged within the main body and configured to move between the first and second contact surfaces. The spool has the third contact surface facing the first contact surface, the fourth contact surface facing the second contact surface, and the third through hole extending from the third contact surface to the fourth contact surface.

Abstract: A control valve includes a main body, the first coil assembly arranged on the first side of the main body and having the first contact surface and the first through hole extending from the first contact surface, the second coil assembly arranged on the second side of the main body and having the second contact surface and the second through hole extending from the second contact surface, and a spool arranged within the main body and configured to move between the first and second contact surfaces. The spool has the third contact surface facing the first contact surface, the fourth contact surface facing the second contact surface, and the third through hole extending from the third contact surface to the fourth contact surface.

Abstract: An oil activated fuel injector includes a clevis having an optimized geometry. The optimized geometry substantially eliminates side loading effects of a plunger during operation, thereby maintaining performance integrity of the fuel injector. The optimized geometry includes a profile larger than a head portion of a plunger in order to allow the plunger to free float.

Abstract: A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations and shot to shot fuel variations.

Abstract: A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage and a second pump in a second stage. At least one valve is downstream from one of the first pump and the second pump in at least one of the first stage and the second stage. A common branch line connects the first stage and the second stage to a common hydraulic system.

Abstract: A fuel injector having a piezoelectric actuator. A needle valve is mounted in the injector body and has an opening hydraulic surface substantially surrounded by a high-pressure fuel line in fluid communication with a high-pressure fuel chamber. A control piston partly defines a piston control chamber, which is in fluid communication with the opening hydraulic surface and the high-pressure fuel chamber. The piezoelectric actuator is activated between an off position and an on position for positioning a control valve into an open position or a closed position. A high-pressure fuel condition is maintained in the piston control chamber by fuel supplied from the high-pressure fuel chamber and independent of any actuation of the control valve. In a low pressure fuel condition, a force on the opening hydraulic surface of the needle valve member is greater than the downward force on the closing hydraulic surface thereby opening the needle valve member for producing an injection event.

Abstract: A fuel injector having a piezoelectric actuator. A needle valve is mounted in the injector body and has an opening hydraulic surface substantially surrounded by a high-pressure fuel line in fluid communication with a high-pressure fuel chamber. A control piston partly defines a piston control chamber, which is in fluid communication with the opening hydraulic surface and the high-pressure fuel chamber. The piezoelectric actuator is activated between an off position and an on position for positioning a control valve into an open position or a closed position. A high-pressure fuel condition is maintained in the piston control chamber by fuel supplied from the high-pressure fuel chamber and independent of any actuation of the control valve. In a low pressure fuel condition, a force on the opening hydraulic surface of the needle valve member is greater than the downward force on the closing hydraulic surface thereby opening the needle valve member for producing an injection event.

Abstract: A multiple stage pump having valves upstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage and a second pump in a second stage. At least one valve is upstream from one of the first pump and the second pump in at least one of the first stage and the second stage. A common branch line connects the first stage and the second stage to a common hydraulic system.

Abstract: A multiple stage pump having valves upstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations and shot to shot fuel variations.

Abstract: A multiple stage pump having valves upstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations and shot to shot fuel variations.

Abstract: A multiple stage pump having valves upstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations and shot to shot fuel variations.

Abstract: A control device for switching an intake or exhaust valve of an internal combustion engine has a control valve with a control valve piston for controlling flow of a hydraulic medium from a pressure line to the intake or exhaust valve. At least one actuating element is correlated with the intake or exhaust valve and has a first end acted on by the hydraulic medium. At least one damping device interacts with the at least one actuating element and is arranged at a second end of the actuating element opposite the first end. The at least one damping device exerts a damping force onto the actuating element counteracting a force exerted by the hydraulic medium.

Abstract: An oil activated fuel injector includes a control valve body with end cap solenoids and a slidably mounted spool. A minimized contact surface area exists between the spool and one of the first and second solenoid coils providing a minimized ratio of surface area versus boundary line of a contact surface to prevent a change in latching effects. The minimized surface may be on the end of the spool or one or both of the end caps. The minimized surface area may be a raised portion of different dimensions.