A method of transient control for enrichment operation in a low-temperature combustion engine. The method includes determining if a current mode of the low-temperature combustion (LTC) engine is a positive valve overlap (PVO) mode. Determining if a previous mode of the LTC engine was also the PVO mode when the current mode is the PVO mode, wherein the previous mode is immediately prior to the current mode. Determining if the previous mode of the LTC engine was a negative valve overlap (NVO) mode when the previous mode was not the PVO mode. Initiating a predetermined enrichment PVO mode for the LTC engine based on the previous mode of the LTC engine. The predetermined enrichment PVO mode includes initiating a deep enrichment PVO mode, when the previous mode of the LTC engine was the NVO mode, and initiating a shallow enrichment PVO mode, when the previous mode of the LTC engine was not the NVO mode.

A method for starting an internal combustion engine and a motor vehicle are provided. The internal combustion engine includes a plurality of cylinders. To start the internal combustion engine while deactivated, a predefined amount of working gas is introduced into the cylinder that fires first. A crankshaft of the internal combustion engine is driven by an electric motor and by the movement of a piston coupled to the crankshaft and associated with the cylinder that fires first to introduce the predefined amount of working gas. Subsequently, the internal combustion engine is started by the ignition of a mixture including the predefined amount of working gas and a predefined amount of fuel inside the cylinder that fires first.

A method of determining a condition of a component (e.g., valves) of an engine having a manifold air pressure sensor during a cold test includes providing pressurized air to an intake of the engine. The method includes rotating a crankshaft of the engine. The method includes measuring pressures with the manifold air pressure sensor as a function of crankshaft rotational position. The method includes comparing the pressures with a predetermined baseline. The method includes indicating a condition of the component based on the comparison of the pressures with the baseline.

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.

In accordance with exemplary embodiments, methods and systems are provided for controlling particulate filter regeneration for a particulate filter of a drive system of a vehicle, including: obtaining sensor data pertaining to the drive system via one or more sensors of the vehicle; determining, via a processor of the vehicle, when particulate filter regeneration is warranted, using the sensor data; and providing particulate filter regeneration while performing scavenging with respect to the drive system, via instructions provided by the processor, when it is determined that particulate filter regeneration is warranted.

A control device of an internal combustion engine comprises a heater control part configured to set a target temperature of the electrochemical cell and control the heater so that a temperature of the electrochemical cell becomes the target temperature. The heater control part sets the target temperature to a first temperature when water injection by the water injection device is not being demanded after a predetermined time elapses from startup of the internal combustion engine, and sets the target temperature to a second temperature when an operating state of the internal combustion engine is in a water outflow state where water injected by the water injection device reaches the exhaust passage without going through combustion of air-fuel mixture in the combustion chamber. The second temperature is higher than the first temperature.

In exemplary embodiments, methods, and systems for multivariable torque control of a vehicle are provided. The method includes configuring a processor disposed of in a multivariable controller to determine a set of references associated with Exhaust Gas Recirculation (EGR) by implementing an algorithm based on engine temperature and at least one reference associated with the EGR to generate commands for the control of a set of actuators; Optimizing at least one cam phase position by the control based on a generated command to apply an appropriate level of engine torque for vehicle propulsion; Restricting an allowable range of cam phases associated with operations of an EGR valve for a set of cams based on amounts of humidity and EGR introduced by the EGR valve during an internal combustion phase of vehicle operation; and providing an amount of propulsion torque by an engine in accordance with instructions provided by the processor.

An air supply device for an electrically heated catalyst is proposed. The device includes an electronic supercharger fluidly connected to an intake manifold, an intake valve fluidly connected to the electronic supercharger, an exhaust valve fluidly connected to an exhaust manifold of the engine, an electrically heated catalyst fluidly connected to the exhaust manifold and positioned in a front end of a catalyst part, and a controller configured to control driving of the electronic supercharger and an opening degree of each of the intake valve and the exhaust valve. The controller controls the electronic supercharger based on a door opening condition in a cold operation and switches the intake valve to an advance state and the exhaust valve to a retard state, thus heating the electrically heated catalyst.

A method for operating an engine during a fuel cut-off mode is disclosed. The method may adjust exhaust valve opening timing and exhaust valve lift of one or more cylinders to heat air flowing through the one or more cylinders so that a temperature of an after treatment device may be maintained or increased.

A vehicle control system for a powertrain including an internal combustion engine having an intake valve and an exhaust valve in a vehicle includes an electronic control unit (ECU) operable to control a continuously variable valve duration (CVVD) of the intake and exhaust valves in the engine, a communicator operable to receive an input data from at least one input system, and a storage device having predetermined calibration value. The ECU of the vehicle control system is configured to reference the predetermined calibration values based on a received input data, determines to adjust the CVVD of the intake and exhaust valves, and send a signal to the engine for changing an overlap area of the CVVD. The vehicle control system operates a process for controlling the CVVD of the engine as a method.