An apparatus for controlling an engine includes an engine including a plurality of combustion chambers for generating driving torque by burning a fuel, a high-capacity turbocharger including a turbine rotated by the exhaust gas exhausted from the combustion chambers and a compressor rotated together with the turbine for compressing exhaust gas exhausted from the combustion chamber, an electric supercharger including a motor and an electric compressor operated by the motor, a throttle valve for adjusting an intake air amount supplied to the combustion chamber, a driving information detector for detecting driving information including a required torque and an engine speed, and a controller for determining a driving region of the engine from the driving information detected by the driving information detector, and controlling engine torque by adjusting an opening of the throttle valve and an output of the motor according to the driving region of the engine.

An engine system and method for improving engine starting are disclosed. In one example, engine port throttles are adjusted differently during automatic and operator initiated engine starts. The system and method may improve engine torque control during an engine start.

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.

A variable displacement controller for deactivating one or more cylinder assemblies of a vehicle engine can include a processor for performing various operations and the operations can include: receiving data indicative of a requested torque and vehicle speed, determining a torque variable timer threshold value based on the received data indicative of requested torque and vehicle speed, initiating a timer, comparing the timer value to the variable timer threshold value, and selectively activating/deactivating at least one of the engine cylinder assemblies based on the comparison between the timer value and the variable timer threshold value. At least one of the engine cylinder assemblies is activated if the timer value is less than the variable timer threshold value, and at least one of the engine cylinder assemblies is deactivated if the timer value is greater than or equal to the variable timer threshold value.

A controller for an internal combustion engine includes an electronic control unit. The electronic control unit is configured to increase an air amount that is suctioned into a cylinder while maintaining the lean air-fuel ratio as a first torque increasing operation in a case where target torque is increased during the operation at the lean air-fuel ratio such that torque is increased. The electronic control unit is configured to compute limit torque as an upper limit of the torque that can be realized in a case where the lean air-fuel ratio is kept for a certain time from a current time point. The electronic control unit is configured to switch to the operation at the theoretical air-fuel ratio and increase the torque as a second torque increasing operation in a case where the target torque becomes higher than the limit torque during execution of the first torque increasing operation.

A drive torque control device of a vehicle that includes a drive source for generating a drive source torque, a brake mechanism for generating a braking toque, and a drive wheel for driving the vehicle. The drive torque control device includes a target drive wheel torque calculator configured to calculate a target drive wheel torque, a drive source torque control unit configured to estimate a drive source torque limit value, calculate a target drive source torque based on the target drive wheel torque and the drive source torque limit value, and control the generation of the drive source torque by the drive source based on the target drive source torque, and a braking torque control unit configured to calculate a target braking torque based on the target drive wheel torque and the target drive source torque, and control the generation of the braking torque by the brake mechanism based on the target braking torque.

Methods and controllers for coordinating firing fraction transitions that occur in conjunction with transmission shifts are described. In one aspect, an engine controller transmits a do-not-shift instruction to a transmission controller based at least in part on a determination that a particular type of firing fraction transition is desired. The firing fraction transition is then implemented using a skip fire transition protocol. In this manner, the transmission is affirmatively prevented from shifting during the firing fraction transition. The described approaches are well suited for use in connection with transitions to DCCO or DFCO operation.

Methods, systems, and devices for operating an engine controller in a vehicle for managing motor torque smoothing. One controller is configured to select a periodic disruptive waveform generated over a period of time to approximate that is associated with the vehicle being at idle, determine a first harmonic sinusoid from a group of harmonic sinusoids that reduces the error between an approximated waveform and the disruptive waveform, and initiate a supplemental quantity of torque during the period of time based on the disruption quantity of torque.

Control techniques for a turbocharger of an engine utilize a wastegate valve configured to divert exhaust gas from a turbine of the turbocharger that is rotatably coupled to a compressor of the turbocharger. A controller is utilized to obtain a torque request for the engine, determine a target compressor power based on the engine torque request, determine a normalized target turbine power based on the target compressor power, determine a target position for the wastegate valve based on the normalized target turbine power and a normalized exhaust flow, and actuate the wastegate valve to the target position. Such control techniques involve the actual calculation of much less intermediate parameters, such as target turbine pressure ratio, which results in more efficient calibration and implementation.

An engine control system for a vehicle includes a target torque module that determines a target torque output of an engine based on at least one driver input. A target air per cylinder (APC) module determines a target APC for the engine based on the target torque. A target mass airflow (MAF) module determines a target MAF through a throttle valve of the engine based on the target APC, a number of activated cylinders of the engine, and a total number of cylinders of the engine. A throttle control module determines a target throttle opening based on the target MAF and controls opening of the throttle valve based on the target throttle opening.