A control system and method relating to operation of an internal combustion engine, particularly an engine for powering an unmanned aerial vehicle. The engine has a combustion chamber and a throttle for regulating fluid flow to the combustion chamber, the throttle being operable under the control of an electronic control unit. With the control system and method there are first and second modes optionally available for operation of the engine. In the first mode the engine is operable at a throttle setting set by a request from a first remote controller (e.g. a ground-based controller) via a second on-board controller. In the second mode the engine is operable at a prescribed minimum throttle setting asserted by the electronic control unit which limits the authority of the on-board controller. The engine is caused to operate in the second mode if a particular throttle setting determined from a request of the remote controller is less than the prescribed minimum throttle setting.

An internal combustion engine system includes an engine with a plurality of pistons housed in respective ones of a plurality of cylinders, an air intake system to provide air to the plurality of cylinders through respective ones of a plurality of intake valves, an exhaust system to release exhaust gas from the plurality of cylinders through respective one of a plurality of exhaust valves. The internal combustion engine uses vacuum braking and/or compression release braking in response to one or more braking conditions.

Systems and methods for improving regeneration of a particulate filter located in an exhaust system of a vehicle are presented. In one example, the particulate filter is regenerated when the vehicle is expected to operate in a stationary electric power generating mode where the vehicle supplies electric power to off-board electric power consumers.

Methods and systems are provided for enabling turbocharger shaft speed control without overfilling a system battery. In one example, shaft speed is reduced by applying a negative torque from an electric boost assist motor until a system battery has been sufficiently charged. Thereafter, electrical power from shaft braking is recuperated by commanding a positive torque onto a driveline of the vehicle via a BISG.

Methods and systems are provided for conducting an engine diagnostic for a vehicle based on an amount of noise proximate to the vehicle. In one example, a method (or system) for a vehicle may include determining an ambient noise level surrounding the vehicle based on data received from autonomous vehicle sensors and conducting an engine diagnostic by operating a pump, motor, and/or actuators responsive to the determined ambient noise level. The engine diagnostic may be conducted while the vehicle is keyed off or while the engine is running and may be further conducted based on a proximity of human activity to the vehicle.

Unclogging group for unclogging a filter of a pumping group for pumping diesel to an internal combustion engine, the unclogging group comprising: a metering unit comprising an electromagnetic head and a control valve for controlling the diesel flow; a filter associated with the control valve made at least in part of metallic material; a temperature sensor for measuring the ambient temperature; a control unit coupled to the temperature sensor; an electrical circuit controlled by the control unit for supplying electrical current to the filter; wherein the control unit is configured so once received the starting input of the pumping group it compares the temperature measured by the temperature sensor with a threshold value, and if the temperature measured by the temperature sensor is less than the threshold value the control unit commands a delay of the starling of the pumping group of a period wherein the control unit supplies electrical current to the electrical circuit connected to the filter.

Embodiments describe a method of controlling a two-stroke internal combustion engine. A method of controlling a two-stroke internal combustion engine includes determining a base nominal exhaust gas temperature, determining a base barometric pressure correction to base nominal exhaust gas temperature, determining exhaust gas temperature differential, determining exhaust gas temperature injection correction, and utilizing the exhaust gas temperature injection correction to make a final short-term fuel or ignition correction.

An embodiment provides an engine operation control method for a hybrid electric vehicle. The method includes determining a necessity for warm up control for an engine, determining whether a current position corresponds to a specific zone upon determining that the warm up control is necessary, determining whether driving power of the engine is required until the hybrid electric vehicle exits the specific zone when the current position corresponds to the specific zone, performing the warm up control after the hybrid electric vehicle exits the specific zone when the driving power of the engine is not required in the specific zone, and performing the warm up control before arrival at a time or a point at which the driving power of the engine is required when the driving power of the engine is required in the specific zone.

A skip fire control system for an engine of a vehicle includes a set of sensors configured to measure a set of operating parameters of the engine corresponding to a volumetric efficiency of the engine, a set of sub-systems having a set of operational states that affect transitions between different firing patterns/fractions of the engine, and a controller configured to, based on the set of operating parameters and the set of operational states of the set of sub-systems, determine a best firing pattern/fraction by taking into account losses or penalties to transition at least some of the set of operational states of the set of sub-systems to obtain a target firing pattern/fraction, and control the engine based on the target firing pattern/fraction to maximize an efficiency of the engine.

A controller for an aftertreatment system coupled to an engine is configured to: in response to receiving an engine shutdown signal, determine an estimated amount of ammonia stored on a selective catalytic reduction (SCR) catalyst included in the aftertreatment system; in response to determining that the estimated amount of ammonia stored in the SCR catalyst is less than an ammonia storage threshold, cause flow of a heated gas towards the SCR catalyst; cause insertion of reductant into an exhaust gas flowing through the aftertreatment system; and in response to determining that the estimated amount of ammonia stored in the SCR catalyst is equal to or greater than the ammonia storage threshold, cause shutdown of the engine.