A method of controlling a turbocharger of a vehicle includes determining, by a controller, a target boost pressure of intake air of a plurality of turbochargers according to one or more vehicle driving conditions, and determining target opening ratios of a plurality of wastegates respectively provided in the plurality of turbochargers, according to the target boost pressure, determining, by the controller, whether or not a current opening ratio detected by an opening ratio sensor of any one wastegate of the plurality of wastegates is lower than the target opening ratio of the associated wastegate by a reference value, and limiting, by the controller, a maximum rpm of the turbocharger having the associated wastegate when it is determined that the current opening ratio of the associated wastegate is lower than the target opening ratio by the reference value.

A method of controlling a turbocharger of a vehicle includes determining, by a controller, a target boost pressure of intake air of a plurality of turbochargers according to one or more vehicle driving conditions, and determining target opening ratios of a plurality of wastegates respectively provided in the plurality of turbochargers, according to the target boost pressure, determining, by the controller, whether or not a current opening ratio detected by an opening ratio sensor of any one wastegate of the plurality of wastegates is lower than the target opening ratio of the associated wastegate by a reference value, and limiting, by the controller, a maximum rpm of the turbocharger having the associated wastegate when it is determined that the current opening ratio of the associated wastegate is lower than the target opening ratio by the reference value.

A system for measuring quality of fuel in an engine is disclosed. The system includes a fuel quality measuring unit and a controller in communication with the fuel quality measuring unit. The fuel quality measuring unit includes a first valve, a second valve, and a quality measurement sensor disposed between the first valve and the second valve. The controller is configured to determine whether the engine is running in a steady state condition, and identify a measurement window based on a pressure of the fuel at an inlet, an Intake Manifold Pressure (IMP), and the steady state condition. The controller is configured to control an opening and a closing of the first valve, the second valve, and a fuel metering valve during the measurement window. The controller is configured to determine the quality of the fuel captured between the first valve and the second valve by the quality measurement sensor.

According to a device and a method for controlling an internal combustion engine, a control device (38) enables controllability of the internal combustion engine to be improved by preventing surging from occurring upon starting or stopping of the internal combustion engine, by opening a relief valve (28) as a turbine rotational speed reaches a surging rotational speed when the control device (38) causes a motor generator (32) to assist in rotation of the turbocharger (12) upon starting of a diesel engine body (11).

According to a device and a method for controlling an internal combustion engine, a control device (38) enables controllability of the internal combustion engine to be improved by preventing surging from occurring upon starting or stopping of the internal combustion engine, by opening a relief valve (28) as a turbine rotational speed reaches a surging rotational speed when the control device (38) causes a motor generator (32) to assist in rotation of the turbocharger (12) upon starting of a diesel engine body (11).

An engine system includes an intake passage, a non-deactivation exhaust passage, a second exhaust manifold, a first turbocharger including a first turbine rotated by exhaust gas flowing via the first exhaust manifold, a second turbocharger including a second turbine rotated by exhaust gas flowing via the second exhaust manifold, an exhaust outlet, a main intake circulation passage in communication with the intake passage via a compressor of the first turbocharger such that supercharging air is supplied to the intake passage, a sub intake circulation passage in communication with the main intake circulation passage via a compressor of the second turbocharger such that supercharging air is supplied to the main intake circulation passage, and a deactivation valve disposed on the sub intake circulation passage between the compressor of the second turbocharger and the main intake circulation passage so as to selectively open/close the sub intake circulation passage.

An engine system includes an intake passage, a non-deactivation exhaust passage, a second exhaust manifold, a first turbocharger including a first turbine rotated by exhaust gas flowing via the first exhaust manifold, a second turbocharger including a second turbine rotated by exhaust gas flowing via the second exhaust manifold, an exhaust outlet, a main intake circulation passage in communication with the intake passage via a compressor of the first turbocharger such that supercharging air is supplied to the intake passage, a sub intake circulation passage in communication with the main intake circulation passage via a compressor of the second turbocharger such that supercharging air is supplied to the main intake circulation passage, and a deactivation valve disposed on the sub intake circulation passage between the compressor of the second turbocharger and the main intake circulation passage so as to selectively open/close the sub intake circulation passage.

The present disclosure relates to a gas engine heat pump including: an engine which burns a mixed air of air and fuel; a first charger which compresses the mixed air and supplies to the engine; a first exhaust flow path which is connected to the engine, and through which exhaust gas discharged from the engine flows; and a second charger which is driven by the exhaust gas branched from the first exhaust flow path to a second exhaust flow path, and compresses the exhaust gas discharged from the engine and supplies the compressed exhaust gas to the engine, thereby reducing the emission of nitrogen oxide by recirculating the exhaust gas without additional power consumption.

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 turbocharged internal combustion engine system includes at least one high pressure turbocharger system mounted on-engine and at least one low pressure turbocharger system mounted off-engine. An intercooler can further be mounted off-engine with the low pressure turbocharger and an aftercooler can be mounted on-engine with the high pressure turbocharger.