Abstract: The invention relates to an assembly for an electrically operated valve in the automotive field aimed to increase the injection pressure of fuel distributed to combustion chambers, said assembly comprising both a coil unit, wherein a solenoid can control the movements of the electrically operated valve in a housing along a given axis, and an hydraulic unit to provide fuel at the injection pressure, a clip ring being located into a cavity of the coil unit and a cavity of the hydraulic unit to maintain the coil unit and the hydraulic unit associated. The invention is characterized in that the coil unit presents a plurality of slots providing access to the clip ring, across the coil unit, from the exterior of the assembly.

Abstract: A fuel pump is provided for pressurising fuel in a high-pressure fuel injection system. The fuel pump comprises a pump head, a pumping element, a frame and a casing. The pump head has a pumping chamber that is arranged to receive fuel to be pressurised. The pumping element is arranged to reciprocate responsive to movement of a driving element, the pumping element defining, in part, the pumping chamber so that, in use, as the pumping element reciprocates, a force, transferred from the driving element, is applied to the fuel within the pumping chamber to pressurise the fuel. The frame is arranged to support the driving element and the pump head. The casing defines an internal volume for containing fluid, wherein at least a part of the frame, at least a part of the drive element, and at least a part of the pumping element are received in the casing.

Abstract: A pump assembly for use in a selective catalytic reduction system, the pump assembly comprising: a pump sub-assembly defining a pump axis; and a housing sub-assembly including a cavity for receiving the pump sub-assembly and comprising an inlet port for receiving a reagent for supply to the pump sub-assembly via a flow path; wherein at least one seal member is provided to seal the pump sub-assembly within the housing sub-assembly, the seal member being provided in a groove in an outer face of the pump sub-assembly, the seal member providing a fluid tight seal.

Abstract: A pump assembly having improved cooling for use in a selective catalytic reduction system is disclosed. The pump assembly comprises a pump housing having a body portion and a nozzle portion extending from the body portion, a jacket including a cavity for receiving the pump housing, first and second ports for cooling fluid, and a flow guide disposed between the jacket and the pump housing. The cavity includes a first compartment for cooling fluid defined in part by the flow guide and in part by the pump housing and being in fluid communication with the first port; and a second compartment for cooling fluid defined in part by the flow guide and in part by the jacket. The first compartment is in fluid communication with the second port by way of the second compartment.

Abstract: A method of monitoring functional capability of a soot sensor that is responsive to deposition of soot from an exhaust gas stream on a sensor surface comprises acquiring a measurement signal of the soot sensor and running a plausibility check, in which it is ascertained whether the measurement signal agrees with an expected finding. According to the invention it is detected whether conditions are present, on which liquid, e.g. water, from the exhaust gas stream condensates on the sensor surface. Additionally or alternatively, such conditions are produced. The plausibility check then includes ascertaining whether the measurement signal reflects the condensation of liquid. The detection of presence of conditions for condensation comprises a measurement or an estimation of temperature on the sensor surface.

Abstract: An injection device for administering a reagent into an exhaust passage of an internal combustion engine, the injection device having an axis along its length and comprising an outwardly opening valve member having a seating surface which is engageable with a valve seating region. A seating member provided with an internal bore which defines the valve seating region, wherein the internal bore further defines a flow re-directing region downstream of the valve seating region. The seating member has an end face provided with a feature which intersects with at least a portion of the flow re-directing region to define, together with the flow re-directing region, a spray path for reagent exiting the injection device when the valve member is moved outwardly from the bore away from the valve seating region. The spray path has a variable spray angle, relative to the axis, around the circumference of the valve seating region.

Abstract: A pump unit has an inlet valve, an outlet valve, a supply line for supplying fuel, a pumping chamber, and a plunger for pressurising fuel in the pumping chamber. The inlet valve includes an inlet valve member movable between a first position and a second position. The inlet valve member has an aperture formed therein. The aperture provides a first fluid pathway between the pumping chamber and the supply line when the inlet valve member is in its first position, and the aperture provides a second fluid pathway between the pumping chamber and the outlet valve when the inlet valve member is in its second position.