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.

Based on entry/exit pressures of a compressor detected by atmospheric/boost pressure sensors, a pressure ratio of compressor is calculated. Based on mass flow rate and entry temperature of intake air detected by intake air flow-rate/temperature sensors and entry pressure, a volumetric flow rate of intake air is calculated in environmental condition at a detection time using gas state equation, and is corrected into a volumetric flow rate under standard environmental condition thorough multiplication by a corrective coefficient based on entry temperature of intake air. Based on the corrected value and the calculated pressure ratio, a rotational frequency of compressor under standard environmental condition is read out in light of operating characteristic diagram for the compressor. Read-out rotational frequency is corrected into actual rotational frequency of the compressor through multiplication by a corrective coefficient based on entry temperature of intake air, which is determined as rotational frequency of turbocharger.

Based on entry/exit pressures of a compressor detected by atmospheric/boost pressure sensors, a pressure ratio of compressor is calculated. Based on mass flow rate and entry temperature of intake air detected by intake air flow-rate/temperature sensors and entry pressure, a volumetric flow rate of intake air is calculated in environmental condition at a detection time using gas state equation, and is corrected into a volumetric flow rate under standard environmental condition thorough multiplication by a corrective coefficient based on entry temperature of intake air. Based on the corrected value and the calculated pressure ratio, a rotational frequency of compressor under standard environmental condition is read out in light of operating characteristic diagram for the compressor. Read-out rotational frequency is corrected into actual rotational frequency of the compressor through multiplication by a corrective coefficient based on entry temperature of intake air, which is determined as rotational frequency of turbocharger.

In a control system for an internal combustion engine, the waste gate actuator controls the opening and closing of a waste gate valve according to operation amount controlled by the control device, an actual position of the waste gate actuator detected by the position sensor for detecting the position of the waste gate actuator which correlates to the actual open position of a waste gate valve is inputted to the control device, the control device performs control for limiting the operation amount to stop to predetermined opening deviation in the direction toward open side from open side stopper position of the waste gate.

This surge determination device is provided with a surge determination unit for determining the presence or absence of a surge of a compressor that outputs compressed air to an engine on the basis of a rotation speed of the engine and an air flow rate.

This surge determination device is provided with a surge determination unit for determining the presence or absence of a surge of a compressor that outputs compressed air to an engine on the basis of a rotation speed of the engine and an air flow rate.

A process for monitoring turbocharger operation in a machine is disclosed. The machine includes a power source having an intake manifold for supplying the power source with air and a plurality of turbochargers. Each turbocharger includes an air inlet passageway to receive air, a plurality of pressure sensors arranged within the inlet passageway, a compressor configured to pressurize air, an air outlet passageway to direct pressurized air from the compressor to the intake manifold, and an exhaust turbine operably driven by exhaust gas from the power source and coupled to the compressor by a turbine shaft. The process includes monitoring the differential pressure across the air inlet passageway for each turbocharger, comparing the differential pressures for each turbocharger and indicating an anomaly in turbocharger speed when the differential pressure for one turbocharger exceeds the differential pressure for another turbocharger by a threshold amount.

A process for monitoring turbocharger operation in a machine is disclosed. The machine includes a power source having an intake manifold for supplying the power source with air and a plurality of turbochargers. Each turbocharger includes an air inlet passageway to receive air, a plurality of pressure sensors arranged within the inlet passageway, a compressor configured to pressurize air, an air outlet passageway to direct pressurized air from the compressor to the intake manifold, and an exhaust turbine operably driven by exhaust gas from the power source and coupled to the compressor by a turbine shaft. The process includes monitoring the differential pressure across the air inlet passageway for each turbocharger, comparing the differential pressures for each turbocharger and indicating an anomaly in turbocharger speed when the differential pressure for one turbocharger exceeds the differential pressure for another turbocharger by a threshold amount.

A radial compressor has an iris diaphragm mechanism for a pressure-charging device of an internal combustion engine. The radial compressor has a bearing assembly, in which a rotor shaft is rotatably mounted, having a compressor impeller arranged in a compressor housing for conjoint rotation on the rotor shaft and having a fresh air supply channel for carrying a fresh air mass flow to the compressor impeller. The iris diaphragm mechanism is upstream of the compressor impeller, allowing variable adjustment of a flow cross section for the fresh air mass flow for admission to the compressor impeller, at least over a partial region. For this purpose, the iris diaphragm mechanism has multiple lamellae which each have a plate style lamella main body and a pin style actuating element as integral constituent parts of the respective lamella.