Devices and methods are described for remotely tuning a diesel engine of a vehicle using a pneumatic control device. A tunable control system for an aneroid fuel control (AFC) injection system includes a pneumatic control device that has a pneumatic pressure regulator configured to be adjusted by a first tuning adjustment controller and a pneumatic flow control valve configured to be adjusted by a second tuning adjustment controller. An air signal line links the pressure regulator to the flow control valve. The control system also includes an inlet line connected to the control device and configured to be connected to an air pressure source of an engine. An outlet line is connected to the control device and is configured to be connected to an AFC of an engine.

Devices and methods are described for remotely tuning a diesel engine of a vehicle using a pneumatic control device. A tunable control system for an aneroid fuel control (AFC) injection system includes a pneumatic control device that has a pneumatic pressure regulator configured to be adjusted by a first tuning adjustment controller and a pneumatic flow control valve configured to be adjusted by a second tuning adjustment controller. An air signal line links the pressure regulator to the flow control valve. The control system also includes an inlet line connected to the control device and configured to be connected to an air pressure source of an engine. An outlet line is connected to the control device and is configured to be connected to an AFC of an engine.

An adjustable fuel plate device for a diesel fuel pump is disclosed. The adjustable fuel plate device can include a fuel plate to limit travel of a governor arm of a diesel fuel pump for a diesel engine. The adjustable fuel plate device can also include a translation mechanism to move the fuel plate relative to the governor arm. Additionally, the adjustable fuel plate device can include a control system coupleable to the translation mechanism to control movement of the fuel plate during operation of the engine.

An adjustable fuel plate device for a diesel fuel pump is disclosed. The adjustable fuel plate device can include a fuel plate to limit travel of a governor arm of a diesel fuel pump for a diesel engine. The adjustable fuel plate device can also include a translation mechanism to move the fuel plate relative to the governor arm. Additionally, the adjustable fuel plate device can include a control system coupleable to the translation mechanism to control movement of the fuel plate during operation of the engine.

An adjustable fuel plate device for a diesel fuel pump is disclosed. The adjustable fuel plate device can include a fuel plate to limit travel of a governor arm of a diesel fuel pump for a diesel engine. The adjustable fuel plate device can also include a translation mechanism to move the fuel plate relative to the governor arm. Additionally, the adjustable fuel plate device can include a control system coupleable to the translation mechanism to control movement of the fuel plate during operation of the engine.

An adjustable fuel plate device for a diesel fuel pump is disclosed. The adjustable fuel plate device can include a fuel plate to limit travel of a governor arm of a diesel fuel pump for a diesel engine. The adjustable fuel plate device can also include a translation mechanism to move the fuel plate relative to the governor arm. Additionally, the adjustable fuel plate device can include a control system coupleable to the translation mechanism to control movement of the fuel plate during operation of the engine.