A fuel injector testing machine is provided. The machine includes a head unit having a flow meter, and a fuel injector holding assembly. The head unit and/or the fuel injector holding assembly can be moved relative to each other, allowing the head unit to test a subset of fuel injectors held on the fuel injector holding assembly, and subsequently can test another subset of the fuel injectors via movement of the head unit and/or fuel injector holding assembly.

A method of testing a fuel injection system or components thereof includes running a high pressure fuel pump to provide fluid under pressure to the fuel injection system or components. The pump flow is controlled via an inlet metering valve by controlling current or voltage supplied to the inlet metering valve dependent on the power to the fuel pump.

A method of testing a fuel injection system or components thereof includes running a high pressure fuel pump to provide fluid under pressure to the fuel injection system or components. The pump flow is controlled via an inlet metering valve by controlling current or voltage supplied to the inlet metering valve dependent on the power to the fuel pump.

The present invention relates to a fuel additive composition for controlling formation of deposits and for reducing already formed deposits formed in a fuel injection system and engine, or in an internal combustion engine, wherein the fuel additive composition comprises oxide derivative of (a) iso-borneol or (b) borneol, and to a method of use thereof. In one embodiment, the present invention relates to a fuel additive composition for controlling formation of deposits and for reducing already formed deposits formed in a fuel injection system and engine, or in an internal combustion engine, wherein the fuel additive composition comprises (a) iso-borneol or (b) borneol, and to a method of use thereof. In one embodiment, the present invention relates to a fuel additive composition for controlling formation of deposits and for reducing already formed deposits formed in a fuel injection system and engine, or in an internal combustion engine, wherein the fuel additive composition comprises a mixture of oxirane or an oxide compound with (a) iso-borneol or (b) borneol, and to a method of use thereof. In one embodiment, the present invention relates to a composition comprising a fuel and the fuel additive composition of the present invention.

Disclosed is a method for the diagnosis of a digital valve in a fuel injection system. In the diagnosis, a diagnosis current is applied to the digital valve with an intensity and for a hold time that are predetermined by experiment on digital valves identified as being fault-free, this intensity and this time being recognized as being sufficient for an inflection on a curve of the closing current to be detected in the hold time. Measurements are taken at more than 3 kHz of the diagnosis current added to the induced current in the hold time. When an inflection on the current curve is detected in this hold time, it is concluded that the valve is working correctly. When no inflection on the curve is detected in this hold time, it is concluded that the valve is faulty.

A testing apparatus for a fuel injector includes an upper mount for receiving an inlet of the fuel injector; a lower mount located beneath the upper mount for receiving a nozzle end of the fuel injector; and at least one of a removable inlet adaptor and a removeable outlet adapter. The inlet of the fuel injector fits into the inlet adaptor to allow a flow of fluid to be delivered through the inlet adaptor to the fuel injector and removable from the upper mount. The removable outlet adaptor removable from the lower mount.

A testing apparatus for a fuel injector includes an upper mount for receiving an inlet of the fuel injector; a lower mount located beneath the upper mount for receiving a nozzle end of the fuel injector; and at least one of a removable inlet adaptor and a removeable outlet adapter. The inlet of the fuel injector fits into the inlet adaptor to allow a flow of fluid to be delivered through the inlet adaptor to the fuel injector and removable from the upper mount. The removable outlet adaptor removable from the lower mount.

Methods and systems are provided for reducing errors in estimated fuel rail pressure incurred at the time of a scheduled injection event due to engine-driven cyclic fuel rail pressure changes. In one example, a pulse-width commanded during a scheduled injection event is determined as a function fuel rail pressure samples collected over a moving window that is customized for the corresponding fuel injector. In another example, the commanded pulse-width is determined as a function of an average fuel rail pressure sampled during a quiet zone of injector operation and predicted fuel rail pressure altering events occurring between the quiet zone and the scheduled injection event.

A method and system is provided for reducing surface roughness of a diesel engine component. The method and system may apply a voltage to a plasma electrolyte polishing cell. The plasma electrolyte polishing cell may include a diesel engine component and an aqueous electrolyte solution. The method and system may cause a plasma layer to form around a surface of the diesel engine component as a result of applying the voltage to the plasma electrolyte polishing cell. The method and system may terminate the voltage to the plasma electrolyte polishing cell. The method and system may apply a coating process to the diesel engine component.

A method and a system for determining a temperature for pressurized fuel included in a high pressure fuel system arranged for providing fuel to an engine are presented. The method includes determining a first temperature for a first fuel volume included in a first section of the high pressure fuel system, where the first section includes a common rail fuel system. The method further includes determining a second temperature for a second fuel volume included in a second section of the high pressure fuel system, where the second section includes at least one fuel injector arranged in a cylinder head of the engine. The method also includes the step of determining the temperature for the pressurized fuel based at least on the first temperature and on the second temperature.