An electronic throttle valve apparatus including a suction pressure sensor provided on the upstream of a throttle valve to measure pressure of an intake air that flows into the throttle valve is provided. The electronic throttle valve apparatus includes a throttle housing having one side installed in an intake manifold of an engine. Within an inside of the throttle housing, a throttle valve is rotatably provided. The electronic throttle valve apparatus further includes an air tube fastened to the other side of the throttle housing and fastened to an intake flow line, and a suction pressure sensor provided in the air tube and configured to measure pressure of an intake air that flows through the intake flow line. Accordingly, the suction pressure sensor is provided in the air tube that is fastened to the throttle housing, and thus the pressure of the intake air that flows into the throttle valve is easily measured.

A method for diagnosing a waste gate valve malfunction in a power generation system is presented. The method includes determining an actual pressure differential across a throttle valve. The method further includes determining an estimated pressure differential across the throttle valve based on one or more first operating parameters of the power generation system. Furthermore, the method includes determining an absolute difference between the actual pressure differential and the estimated pressure differential. Moreover, the method also includes comparing the absolute difference with a threshold value and if the absolute difference is greater than the threshold value, determining an operating condition of the throttle valve. Additionally, the method includes determining whether the waste gate valve has malfunctioned based on the determined operating condition of the throttle valve. An engine controller and a power generation system employing the method are also presented.

A sensor arrangement of an internal combustion engine includes an intake duct including one or more curved parts bent or curved and connecting an intercooler and a throttle; and a pressure sensor provided on the intake duct and configured to detect a pressure in the intake duct. The pressure sensor includes a detector disposed close to an outside curved portion of a curved part.

A control device for an internal combustion engine includes an intake air amount controller and a variable valve controller. The intake air amount controller includes an exhaust manifold pressure calculator, an engine intake air amount calculator, a volumetric efficiency correction coefficient calculator, a cylinder intake air amount calculator, an exhaust gas flow rate calculator, and a cylinder intake air amount controller. The volumetric efficiency correction coefficient calculator calculates a volumetric efficiency correction coefficient based on a pressure ratio between an intake manifold pressure and an exhaust manifold pressure, a rotational speed of the internal combustion engine, and an actuation state of at least one of an intake valve and an exhaust valve.

A method for diagnosing a waste gate valve malfunction in a power generation system is presented. The method includes determining an actual pressure differential across a throttle valve. The method further includes determining an estimated pressure differential across the throttle valve based on one or more first operating parameters of the power generation system. Furthermore, the method includes determining an absolute difference between the actual pressure differential and the estimated pressure differential. Moreover, the method also includes comparing the absolute difference with a threshold value and if the absolute difference is greater than the threshold value, determining an operating condition of the throttle valve. Additionally, the method includes determining whether the waste gate valve has malfunctioned based on the determined operating condition of the throttle valve. An engine controller and a power generation system employing the method are also presented.

An engine speed control system for an internal combustion engine includes a throttle, and a sensor that monitors a parameter indicative of pressure or density of fuel and air in an inlet manifold of the engine. The electronic control unit is coupled with the throttle and the sensor and structured to calculate a target mass flow through the throttle, a feedforward control term based on the target mass flow, and a feedforward control term based on data produced by the sensor. The electronic control unit is further structured to vary a position of the throttle based on the feedforward and feedback control terms to adjust a mass flow through the throttle toward the target mass flow. The control system is applicable in throttle governed as well as fuel governed systems.

Various embodiments may include a method for controlling the residual gas mass remaining in a cylinder of an internal combustion engine after a gas exchange process and/or the purge air mass introduced into an exhaust manifold during a gas exchange process, the method comprising: specifying at least one of a desired residual gas mass or a purge air mass of the cylinder of the internal combustion engine; determining a setpoint position of an actuator which influences the specified mass, based on an inverse residual gas model; and setting the determined setpoint position of the actuator.

An acceleration control method through throttle dualization may include detecting a signal of an accelerator pedal scope (APS) by pressing of an accelerator pedal while a vehicle travels determines, by an electronic controller, whether the APS is rapidly changed, performing a first throttle response mode in which acceleration control is performed using a current intake manifold pressure when the APS is not determined to be rapidly changed, and performing a second throttle response mode in which acceleration control is performed using a target intake manifold pressure when the APS is determined to be rapidly changed.

An engine speed control system for an internal combustion engine includes a throttle, and a sensor that monitors a parameter indicative of pressure or density of fuel and air in an inlet manifold of the engine. The electronic control unit is coupled with the throttle and the sensor and structured to calculate a target mass flow through the throttle, a feedforward control term based on the target mass flow, and a feedforward control term based on data produced by the sensor. The electronic control unit is further structured to vary a position of the throttle based on the feedforward and feedback control terms to adjust a mass flow through the throttle toward the target mass flow. The control system is applicable in throttle governed as well as fuel governed systems.

Methods and systems for operating an engine that includes an electrically operated throttle are disclosed. In one example, mitigating actions are taken in response to degradation of the electrically operated throttle so that the engine may be operated in a way that allows a driver to reach a service area.