A control device for an internal combustion engine including a fuel injection valve and an actuator includes an electronic control unit. The fuel injection valve directly injects fuel into a combustion chamber. The actuator is configured to change the oxygen concentration in intake gas supplied to the combustion chamber of the internal combustion engine. The electronic control unit is configured to control fuel injection from the fuel injection valve and the actuator.

A control apparatus includes a diesel engine having a throttle valve and a fuel injection valve, an electric driving machine that assists in drive of the engine, and a controller configured to stop the engine automatically when a first condition for automatically stopping the engine is established during an operation of the engine. At this time, the controller is configured to operate the throttle valve to a closing side in response to establishment of a second condition that is established prior to establishment of the first condition, and stop supply of fuel by the fuel injection valve in response to subsequent establishment of the first condition.

A method and an arrangement for operating an internal combustion engine. According to the method, a load threshold is defined below which load control by a throttle valve is performed.

In a diesel engine, displacement of an amount of fuel injection is calculated on the basis of a reference amount of heat production and an actual amount of heat production, and an amount of fuel injection from an injector is corrected on the basis of the displacement of an amount of fuel injection. Displacement of a heat production rate gradient is calculated by subtracting an actual heat production rate gradient from a reference heat production rate gradient, displacement of an amount of intake air on the basis of the displacement of heat production rate gradient and the displacement of the amount of fuel injection, and the amount of intake air is corrected by adjusting a supercharging pressure of a turbocharger on the basis of the displacement of the amount of intake air. Accordingly, it is possible to adjust the amount of fuel injection and the amount of intake air.

A control device for an internal combustion engine includes an electronic control unit configured to switch a control algorithms for a calculation of a command value of the actuator between a first control algorithm and a second control algorithm. The electronic control unit is configured to calculate a value obtained by adding a value of a term of the second control algorithm changing in accordance with the deviation calculated in a present control cycle to the command value calculated in a previous control cycle in accordance with the first control algorithm as a value of the command value calculated in the present control cycle in a first control cycle after switching from the first control algorithm to the second control algorithm. The value of the term changing in accordance with the deviation includes an update amount of an I term of the I control calculated in the present control cycle.

An engine device includes a main throttle valve disposed at a portion where an outlet of a supercharger and an inlet of an intercooler are coupled to each other, an exhaust bypass flow path configured to couple an outlet of an exhaust manifold to an exhaust outlet of the supercharger, an exhaust bypass valve disposed in the exhaust bypass flow path, an air supply bypass flow path configured to bypass a compressor of the supercharger, and an air supply bypass valve disposed in the air supply bypass flow path. Within a low load range of a load on the engine device, when the load is lower than a predetermined load, feedback control is performed on the main throttle valve, and when the load is higher than the predetermined load, map control based on a data table is performed on the main throttle valve.

A transport refrigeration system is provided including a refrigeration unit and a diesel engine powering the refrigeration unit. The diesel engine has an exhaust system for discharging engine exhaust from the diesel engine. An exhaust treatment unit is disposed in the diesel engine exhaust system and includes a diesel oxidation catalyst and a diesel particulate filter. An air control valve is configured to control a quantity of air provided to the diesel engine from an air supply fluidly coupled to the diesel engine. A controller is operably coupled to the air control valve. After initiating regeneration of the diesel particulate filter, the controller is configured to operate the system in either a primary regeneration mode or a secondary regeneration in response to a condition monitored within the exhaust treatment unit.

A control device for an internal combustion engine including a fuel injection valve and an actuator includes an electronic control unit. The fuel injection valve directly injects fuel into a combustion chamber. The actuator is configured to change the oxygen concentration in intake gas supplied to the combustion chamber of the internal combustion engine. The electronic control unit is configured to control fuel injection from the fuel injection valve and the actuator.

A method for diagnosing a component in a gas-routing system of a supercharged combustion engine having an electrically operable compressor, the method including activating the electrically operable compressor after the combustion engine has been shut off, opening a flow path through the gas-routing system, measuring a state variable in the gas-routing system, and detecting a fault of the component as a function of the measured state variable.

A control apparatus includes a diesel engine having a throttle valve and a fuel injection valve, an electric driving machine that assists in drive of the engine, and a controller configured to stop the engine automatically when a first condition for automatically stopping the engine is established during an operation of the engine. At this time, the controller is configured to operate the throttle valve to a closing side in response to establishment of a second condition that is established prior to establishment of the first condition, and stop supply of fuel by the fuel injection valve in response to subsequent establishment of the first condition.