A testing device for general aviation carburetors and fuel servos. The testing device is capable of replicating carburetor operating characteristics and using sensors to monitor and record the operating characteristics of both horizontal and vertical type carburetors, and compare the data received with predefined values. The testing device measures both test fluid and air flow through a carburetor. A moveable camera is placed within the throttle body of the carburetor being tested providing visual inspection of the fluid atomization with snap shot capability. The testing device also includes flow sensors to record the performance of the carburetor, providing automated data collection with memory storage. The device is fully portable with lockable caster wheels.

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.

Methods and systems are provided for injector balancing without disabling a cam actuated high pressure fuel pump. In one example, one of a plurality of cam lobes of the pump is selectively and sequentially disabled while a group of injectors are concurrently operated to learn a pressure drop across each injector. The selection of the injectors is based on the identity and stroke timing of the disabled cam lobe.

An injector testing device includes a fluid pump, which is configured to convey a test oil; a motor, which is connected mechanically to the fluid pump and is configured to drive the fluid pump; at least one injector holding device for mounting at least one injector to be tested; and a rail, which is configured to receive the test oil conveyed by the fluid pump and to fluidly connect to at least one injector to be tested. In this context, the rail is mounted in the injector testing device in such a manner, that it may be swiveled with respect to the at least one injector holding device, in order to align it with the injector to be tested.

An injector testing device includes a fluid pump, which is configured to convey a test oil; a motor, which is connected mechanically to the fluid pump and is configured to drive the fluid pump; at least one injector holding device for mounting at least one injector to be tested; and a rail, which is configured to receive the test oil conveyed by the fluid pump and to fluidly connect to at least one injector to be tested. In this context, the rail is mounted in the injector testing device in such a manner, that it may be swiveled with respect to the at least one injector holding device, in order to align it with the injector to be tested.

Embodiments relate to an operating method for operating a fuel injection system of an internal combustion engine, wherein, upon a detection of a fault in the fuel injection system, and wherein a predefined pressure is overshot in a high-pressure region of the fuel injection system, an overrun mode of the internal combustion engine is deactivated, such that the internal combustion engine is operated exclusively in an injection mode.

An injector testing device includes a fluid pump configured to convey a test oil; a motor mechanically connected to the fluid pump and configured to drive the fluid pump; and a rail configured to receive the test oil conveyed by the fluid pump and to fluidly connect to at least one injector to be tested. The fluid pump, the motor, and the rail are supported elastically in the injector testing device as a common assembly.

An injector testing device includes a fluid pump configured to convey a test oil; a motor mechanically connected to the fluid pump and configured to drive the fluid pump; and a rail configured to receive the test oil conveyed by the fluid pump and to fluidly connect to at least one injector to be tested. The fluid pump, the motor, and the rail are supported elastically in the injector testing device as a common assembly.

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.