An object is to provide an engine system including an intake bypass device whereby it is possible to expand the operation range of a compressor without causing the output of a turbine to become insufficient. An engine system includes an intake bypass device including a bypass channel connecting a downstream side of a compressor of a turbocharger in an intake channel and an upstream side of a turbine of the turbocharger in an exhaust channel, a bypass valve disposed in the bypass channel and configured to control a flow of compressed intake air in the bypass channel, and a heating unit for heating the compressed intake air flowing through the bypass channel.

Methods and systems are provided for controlling a temperature of gases within a heat exchanger, a ratio of gases output by the heat exchanger, and selectively charging/discharging gases from the heat exchanger to one or both of an intake system or an exhaust system. In one example, a method may include controlling operation of an energy recovery device coupled to the heat exchanger in response to engine operating conditions, and increasing or decreasing flow of exhaust gas and/or compressed intake air into the heat exchanger in response to energy recovery device output.

Methods and systems are provided for controlling a temperature of gases within a heat exchanger, a ratio of gases output by the heat exchanger, and selectively charging/discharging gases from the heat exchanger to one or both of an intake system or an exhaust system. In one example, a method may include controlling operation of an energy recovery device coupled to the heat exchanger in response to engine operating conditions, and increasing or decreasing flow of exhaust gas and/or compressed intake air into the heat exchanger in response to energy recovery device output.

A carbon monoxide detection system is provided for a motor vehicle. That carbon monoxide detection system includes a carbon monoxide detector, a battery-free power circuit for powering the carbon monoxide detector and a control module. The control module is configured to stop an internal combustion engine of the motor vehicle when a concentration of carbon monoxide detected by the carbon monoxide detector over a set period of time exceeds a predetermined level.

A carbon monoxide detection system is provided for a motor vehicle. That carbon monoxide detection system includes a carbon monoxide detector, a battery-free power circuit for powering the carbon monoxide detector and a control module. The control module is configured to stop an internal combustion engine of the motor vehicle when a concentration of carbon monoxide detected by the carbon monoxide detector over a set period of time exceeds a predetermined level.

A diesel engine combustion and temperature management system includes injection nozzles for injecting plural fuel additives into an intake of the diesel engine and a controller controlling the amount of each fuel additive injected as a function of engine load, engine speed, exhaust temperature, and/or other parameters.

A diesel engine combustion and temperature management system includes injection nozzles for injecting plural fuel additives into an intake of the diesel engine and a controller controlling the amount of each fuel additive injected as a function of engine load, engine speed, exhaust temperature, and/or other parameters.

A device for measuring temperature of a turbine wheel in a turbocharger includes: a guide that passes infrared ray generated from the turbine wheel and includes a coolant path; a protection unit that protects an optical head which senses the infrared ray; and a signal processing unit that measures a temperature of the turbine wheel by processing a signal corresponding to the sensed infrared ray.

A device for measuring temperature of a turbine wheel in a turbocharger includes: a guide that passes infrared ray generated from the turbine wheel and includes a coolant path; a protection unit that protects an optical head which senses the infrared ray; and a signal processing unit that measures a temperature of the turbine wheel by processing a signal corresponding to the sensed infrared ray.

A control apparatus for an internal combustion engine (i) acquires a rotational speed signal correlated with a rotational speed of the internal combustion engine, (ii) extracts, from the acquired rotational speed signal, at least first-order and lower-order than the first-order components of the rotational speed signal, (iii) extracts, from the acquired rotational speed signal, at least an n-th-order component of the rotational speed signal, (iv) determines that no disturbance has occurred when a first-order parameter regarding a magnitude of an amplitude of the extracted first-order and lower-order than the first-order components is smaller than a first threshold, and (v) determines that a disturbance has occurred when the first-order parameter is equal to or larger than the first threshold and an n-th-order parameter regarding an amplitude of the extracted n-th-order component is equal to or larger than a second threshold.