Patent application number | Description | Published |
20100043760 | FUEL PUMP - A fuel pump is disclosed wherein a substantially cylindrical plunger bore is provided with an annular drain groove fluidically coupled to a drain duct. A pump plunger is driven by a drive system located in a separate mechanical compartment that holds a reservoir of lubricating oil. An annular seal is provided adjacent the drain groove substantially at the end of the bore and retained in position by a seal support. Exemplary embodiments provide the drain groove and seal as being positioned immediately adjacent one another so that the seal forms a lower wall of the drain groove. | 02-25-2010 |
20100226795 | HIGH PRESSURE FUEL PUMP WITH PARALLEL COOLING FUEL FLOW - A high pressure fuel pump with parallel cooling fuel flow is disclosed wherein a fuel pump barrel having a substantially cylindrical plunger bore with an annular drain groove is provided. A first fuel path is provided that fluidically couples a fuel supply to an annular cooling ring formed on the outer surface of the barrel. The first fuel path further fluidically couples the annular cooling ring to a storage tank via an exit passage. A second, parallel fuel path is provided that fluidically couples the first fuel path to the drain groove, and further includes a drain passage fluidically coupled to the drain groove and the first fuel path via the storage tank. | 09-09-2010 |
20110052427 | HIGH PRESSURE TWO-PIECE PLUNGER PUMP ASSEMBLY - A high pressure pumping apparatus for of an internal combustion engine includes a pump barrel having a bore with a central axis, and a two-part pumping plunger provided in the bore of the barrel. The two-part plunger includes first and second pumping plunger parts that are separate from one another and arranged substantially coaxial with the central axis of the barrel's bore. A first distal end portion of the first pumping plunger part abuts a first distal end portion of the second pumping plunger part, and a second distal end portion of the first pumping plunger part in part defines a pumping chamber. The high pressure pumping apparatus includes and a tappet assembly that is operably coupled to the second distal end portion of the second pumping plunger part for operably engaging a rotating camshaft, which causes the first and second plunger parts to move in reciprocal motion. | 03-03-2011 |
20120012681 | FUEL INJECTOR HAVING BALANCED AND GUIDED PLUNGER - A closed nozzle injector for injecting fuel at high pressure into the combustion chamber of an engine, is provided including a lower supply chamber positioned in the nozzle housing, an injector plunger including a lower guide sized to form a close sliding fit with a nozzle housing to guide the plunger during reciprocal movement, and a plurality of restriction orifices formed in the injector plunger and positioned about the injector plunger to restrict fuel flow from an upper supply chamber to the lower supply chamber. The lower guide is positioned axially between the lower supply chamber and the injection orifices. | 01-19-2012 |
20130026257 | FUEL INJECTOR HAVING A PIEZOELECTRIC ACTUATOR AND A SENSOR ASSEMBLY - A fuel injector includes a piezoelectric actuation mechanism and a sensor configuration to measure the condition of the actuation mechanism as well as an associated fuel rail. The sensor configuration includes a piezoelectric sensor with an output signal with significantly reduced distortion that accurately reflects control signals provided to the piezoelectric actuation mechanism. | 01-31-2013 |
20140193281 | FUEL PUMP FOR AN INTERNAL COMBUSTION ENGINE - A high-pressure fuel pump for an internal combustion engine is described. The high-pressure fuel pump includes an improved configuration that beneficially simplifies certain features of the high-pressure fuel pump. More specifically, the disclosure provides for an inlet check valve positioned along an inlet fuel circuit and an outlet fuel circuit of the high-pressure pump that provides a path for a low-pressure inlet fuel flow to and a path for a high-pressure output fuel flow from a pumping chamber of the fuel pump. Because of the configuration of the inlet check valve and the outlet check valve, the complexity of high-pressure fuel pump is beneficially reduced, decreasing the cost of components and assembly and improving the life and reliability of high-pressure fuel pump. | 07-10-2014 |