The invention relates to a method for operating an internal combustion engine comprising: determining a first set point value of a volume of air to be taken into the combustion chamber of the internal combustion engine within one working cycle thereof by retrieving the first set point value from a first characteristic map stored in a memory device of an electronic computing device as a function of a current engine speed of the internal combustion engine and as a function of a torque to be provided by the internal combustion engine; and determining a second set point value by retrieving the second set point value from a second characteristic map stored in the memory device of the electronic computing device as a function of a current engine speed of the internal combustion engine and as a function of a current volume of air supplied to the combustion chamber.

A method and system for operating a vehicle that includes an integrated starter/generator and a driveline disconnect clutch is described. In one example, the method estimates engine torque as a function of engine temperature during cold engine starts so that if an estimate of engine torque is in error, the integrated starter/generator may still successfully start the engine.

A method and system for operating a vehicle that includes an integrated starter/generator and a driveline disconnect clutch is described. In one example, the method estimates engine torque as a function of engine temperature during cold engine starts so that if an estimate of engine torque is in error, the integrated starter/generator may still successfully start the engine.

A diagnosis device for an engine, the diagnosis device includes an electronic control unit. The electronic control unit is configured to execute EGR diagnosis processing to diagnose whether or not the EGR device operates normally while a vehicle is being decelerated, execute air flow meter diagnosis processing to diagnose whether or not the air flow meter is normal while the vehicle is decelerated, execute the EGR diagnosis processing after starting the air flow meter diagnosis processing, and execute the EGR diagnosis processing when the air flow meter diagnosis processing has not been completed and predetermined conditions that a duration of deceleration of the vehicle being shorter than a diagnosis time that is required to execute the air flow meter diagnosis processing are fulfilled.

A diagnosis device for an engine, the diagnosis device includes an electronic control unit. The electronic control unit is configured to execute EGR diagnosis processing to diagnose whether or not the EGR device operates normally while a vehicle is being decelerated, execute air flow meter diagnosis processing to diagnose whether or not the air flow meter is normal while the vehicle is decelerated, execute the EGR diagnosis processing after starting the air flow meter diagnosis processing, and execute the EGR diagnosis processing when the air flow meter diagnosis processing has not been completed and predetermined conditions that a duration of deceleration of the vehicle being shorter than a diagnosis time that is required to execute the air flow meter diagnosis processing are fulfilled.

A vehicle includes an internal combustion engine, an air intake coupled to the internal combustion engine and configured to intake air and supply the air to the engine, a temperature controller coupled to the air intake and to the internal combustion engine, and a control system coupled to the air intake, the internal combustion engine, and to the temperature controller. The control system being configured to receive engine operating data and control a temperature of the air via operation of the temperature controller to control an operating condition of the engine.

The disclosure concerns an internal combustion engine comprising an exhaust camshaft, an intake camshaft, a turbocharger, and a control system. The turbocharger comprises a compressor. A timing of the exhaust camshaft and a timing of the intake camshaft are controllable by the control system, which is configured to: store a compressor map related to the compressor, store a reference area within the compressor map, and determine at least two parameters. In response to the at least two parameters indicating that a current operational point of the compressor is outside the reference area, the control system changes the timing of the exhaust camshaft to advance closing of the exhaust valve, and the timing of the intake camshaft to delay opening of the intake valve.

An exhaust purification apparatus for an internal combustion engine has an exhaust purification catalytic agent disposed in an exhaust passage. The exhaust purification apparatus for the internal combustion engine has an exhaust throttle valve, an actuator, and a controller. The exhaust throttle valve is arranged upstream of the exhaust purification catalytic agent in the exhaust passage and changes a passage sectional area of the exhaust passage. The actuator operates the exhaust throttle valve to be open and closed. The controller controls the exhaust throttle valve to be open and closed through the actuator. The controller decreases an opening degree of the exhaust throttle valve to narrow the passage sectional area of the exhaust passage upon a heating request for heating the exhaust purification catalytic agent.

An exhaust purification apparatus for an internal combustion engine has an exhaust purification catalytic agent disposed in an exhaust passage. The exhaust purification apparatus for the internal combustion engine has an exhaust throttle valve, an actuator, and a controller. The exhaust throttle valve is arranged upstream of the exhaust purification catalytic agent in the exhaust passage and changes a passage sectional area of the exhaust passage. The actuator operates the exhaust throttle valve to be open and closed. The controller controls the exhaust throttle valve to be open and closed through the actuator. The controller decreases an opening degree of the exhaust throttle valve to narrow the passage sectional area of the exhaust passage upon a heating request for heating the exhaust purification catalytic agent.

A controller for an internal combustion engine includes a detector and a processor. The detector detects a combustion condition of a gas in a cylinder of the internal combustion engine. The processor is configured to calculate a fuel ratio in the gas in the cylinder. The processor is configured to calculate a target combustion condition according to the fuel ratio. The processor is configured to calculate an ignition timing such that the combustion condition detected by the detector becomes equal to the target combustion condition.