An air-fuel ratio detection device 1, 1 comprises: a sensor element 2, 2 including a sensor cell 10; a voltage application circuit 40, 40 applying voltage to the sensor cell; a current detector 42, 42 detecting an output current of the sensor cell; an air-fuel ratio calculating part 61 configured to calculate an air-fuel ratio of an exhaust gas; and a parameter detecting part 62 configured to detect or calculate a temperature correlation parameter correlated with a temperature of the sensor element. The air-fuel ratio calculating part is configured to calculate the air-fuel ratio of the exhaust gas based on the temperature correlation parameter and the output current detected when a predetermined voltage is applied to the sensor cell.

During operation of the engine for a time period from a system-on operation to a system-off operation, the vehicle causes the warming-up determination parameter to be subject to addition when an engine is not in a flow path heat release state where an amount of heat released in the supply flow path is expected to be larger than an amount of heat received in the supply flow path, while causing the warming-up determination parameter to be subject to subtraction when the engine is in the flow path heat release state and a duration time of the flow path heat release state is equal to or longer than a first predetermined time period.

An interface circuit assembly for use with an electronic control unit and oxygen sensor of an internal combustion engine. The assembly includes an input port coupled to receive a signal from the oxygen sensor and a processing unit coupled with the input port. The processing unit increases the signal to an output voltage as a function of hydrogen being provided to the internal combustion engine. An output port is coupled with the processing unit and provides the output voltage to the electronic control unit.

An integrated ignition and electronic auto-choke module for an internal combustion engine and an internal combustion engine including the same. In one aspect, the module includes a housing that is configured to be mounted to an engine block of an internal combustion engine. The housing may contain at least a portion of a first temperature sensor that measures a first temperature indicative of an engine temperature. The housing may also contain a controller and at least a portion of an ignition circuit. The controller may be coupled to the first temperature sensor and configured to determine a starting position of a choke valve based on the first temperature and operate an actuator to move the choke valve into the starting position accordingly.

A damage analysis and control system is disclosed. An example process may include receiving a data set of measurements associated with a period of operation of a power system. The data set of measurements may identify a frequency that the power system is in an operating state during the period of operation, and the data set of measurements may identify a frequency of damage measurements associated with the operating state. The process may include determining, using a damage model and the data set of measurements, a damage score for the operating state during the period of operation of the power system. The process may include determining that the damage score satisfies a threshold damage score associated with the damage model and performing an action associated with the power system based on the damage score satisfying the threshold damage score.

A control device for controlling a fuel injection in an internal combustion engine provided with a fuel injection valve has a driving portion supplying an electric power to a terminal of the fuel injection valve so as to drive the fuel injection valve to be opened; a current detecting portion detecting a drive current flowing through the fuel injection valve when the fuel injection valve is driven to be opened; a voltage detecting portion detecting a terminal voltage of the terminal of the fuel injection valve; a correction portion correcting the electric power supplied by the driving portion so that an actual value of the drive current detected by the current detecting portion agrees with a target value; a valve close detecting portion detecting a valve closing timing of the fuel injection valve based on the terminal voltage detected by the voltage detecting portion in a condition where the electric power supplied by the driving portion is corrected by the correction portion.

A method for compensating valve drift in an internal combustion engine having a variable valve train; in the method, an actual value of the current operating state of the internal combustion engine is determined in an air expenditure map and compared to a desired value of the air expenditure map, whereupon the air expenditure map is corrected.

Fuel injection control of an internal combustion engine requires an optimized fuel amount that can be burned completely with oxygen in intake air to be supplied, but the oxygen concentration in the atmospheric air is affected by humidity. By separately calculating a dry air flow rate that directly affects the oxygen amount and a humidity flow rate that is a change factor of the oxygen concentration in the intake air of the internal combustion engine, the fuel can be supplied to the cylinder of the internal combustion engine at an optimized air-fuel ratio. In addition, highly precise control involving EGR for flowback of a part of the exhaust gas flowing in the exhaust pipe to the intake pipe can also be achieved.

Provided is a control device for an internal combustion engine equipped with at least one cylinder, an EGR device, and an actuator that is used for control of an engine control parameter that affects the combustion stability. The control device is configured to: perform, if a condensed water occurrence condition is met, a particle size estimation processing that estimates the particle size of the condensed water that flows into the at least one cylinder from the intake channel; and perform, if the condensed water occurrence condition is met, a correction processing that corrects the engine control parameter so as to improve the combustion stability. In the correction processing, the control device more increases a correction amount of the engine control parameter when the particle size estimated by the particle size estimation processing is greater.

A method for charge pressure control of an internal combustion engine that is an integral part of a drive train, wherein the drive train comprises at least the internal combustion engine, an intake line, an exhaust gas line, and an exhaust gas turbocharger. The internal combustion engine has at least one intake valve that fluidically connects the intake line to a combustion chamber of the internal combustion engine, and at least one exhaust valve that fluidically connects the combustion chamber to a first section of the exhaust gas line. The exhaust gas line has a first section between the combustion chamber and the exhaust gas turbocharger, and a second section downstream from the exhaust gas turbocharger. The exhaust gas turbocharger and/or a bypass that bypasses the exhaust gas turbocharger are/is adjustable. In the method, an opening point in time of the at least one intake valve and a closing point in time of the at least one exhaust valve are taken into account.