A method for NOx emission control during start of a vehicle comprising an exhaust aftertreatment system, an engine, and a NOx sensor is provided. The method includes determining a temperature of the NOx sensor; if the determined temperature of the NOx sensor is below a predetermined threshold, initiating heating of the NOx sensor, and performing a preventive action for delaying engine start until a determined temperature of the NOx sensor exceeds or is equal to the predetermined threshold.

A vehicle includes a display device that displays information indicating an operation state of an internal combustion engine. A display control device which is a control device that controls the display device includes an acquisition unit configured to acquire the operation state of the internal combustion engine. The display control device includes a display control unit that switches information which is displayed on the display device between a warm-up indicator for notifying that warm-up of the internal combustion engine is being performed and a warm-up completion indicator for notifying that warm-up of the internal combustion engine has been completed. The display control unit is configured to prohibit switching from the warm-up completion indicator to the warm-up indicator when the warm-up completion indicator is being displayed on the display device while the internal combustion engine is operating.

A method for operating an engine is disclosed. The method includes activating an engine idling reduction mode. The engine is shut down when the engine idling mode is active and when a measure of at least one first parameter, associated with each of one or more components coupled to the engine, is in respective predetermined ranges. The one or more components comprise at least a transmission assembly. The at least one first parameter corresponds to a temperature of oil in the transmission assembly. The engine is started when the engine idling mode is active and when the measure of the at least one first parameter, associated with at least one of the one or more components, is less than predetermined threshold values.

Methods and systems are provided for conducting an evaporative emissions test diagnostic on a vehicle fuel system and evaporative emissions control system during engine-on conditions. In one example, a first fuel vapor storage device is separated from a second fuel vapor storage device by a one-way check valve, thus preventing loading of the first fuel vapor storage device during conditions such as refueling operations, diurnal temperature fluctuations, or from running-loss vapors from a vehicle fuel tank. In this way, the evaporative emissions test diagnostic may be conducted during a cold-start event where an exhaust catalyst is below a predetermined threshold temperature required for catalytic oxidation of hydrocarbons in the engine exhaust, without increasing undesired exhaust emissions.

An injection device for an internal combustion engine having a first injection system for injecting fuel having a first fuel composition, and a second injection system for the injection of fuel having a second fuel composition that has a lower ethanol component than the first fuel composition, the first injection system having at least one first fuel injector for injecting fuel having the first fuel composition both in the direction of a first intake orifice of a combustion chamber of the internal combustion engine, and in the direction of a second intake orifice of the combustion chamber, in which the second injection system has a second fuel injector for injecting fuel having the second fuel composition essentially only in the direction of the first intake orifice, and a separate third fuel injector for injecting fuel having the second fuel composition essentially only in the direction of the second intake orifice.

An internal combustion engine includes cylinders that are divided into a first cylinder group and a second cylinder group, a cylinder reduction mechanism that holds intake valves and exhaust valves of the first cylinder group in closed states so as to establish a reduced-cylinder state. When the engine is stopped in the reduced-cylinder state, the electronic control unit provided in the engine starts the engine by ignition, by executing fuel injection and ignition in an expansion-stroke cylinder. When the first cylinder group includes an exhaust-stroke cylinder, the engine is started by ignition through fuel injection and ignition in the expansion-stroke cylinder, after a piston is moved in a reverse direction through fuel injection and ignition in the exhaust-stroke cylinder. When the first cylinder group does not include the exhaust-stroke cylinder, the engine is started by ignition, through fuel injection and ignition in the expansion-stroke cylinder and an intake-stroke cylinder.

Systems and apparatuses include an engine, an aftertreatment system including a catalyst, and a controller coupled to the aftertreatment system and the engine. During a warmup period for an engine, the controller determines a value regarding a mass flow rate of exhaust gas based on information received from at least one of the engine or the aftertreatment system. The controller receives a target value regarding the mass flow rate of the exhaust gas. The controller controls at least one of the engine, the aftertreatment system, or at least one component associated therewith to reach or attempt to reach the target value regarding the mass flow rate of the exhaust gas.

Additional approaches for the reduction of particulate emissions in gasoline engines using optimized port+direct injection are described. These embodiments include control of the amount of directly injected fuel so as to avoid a threshold increase in particulates due to piston wetting and reduction of cold start emissions by use of air preheating using variable valve timing.

Disclosed is a method for managing a piston pump using a computer of a vehicle, the pump including a guide, a piston slidably mounted in the guide, and a solenoid, suitable for moving the piston, the method including, as long as the fuel pressure in the compression chamber of the pump is below a predetermined pressure threshold, a step of the computer controlling the solenoid in order to move the piston to its high position, and a step of the computer detecting that the predetermined pressure threshold has been exceeded when the current value, measured after a predetermined period, is greater than or equal to a predetermined reference value so that the computer ceases to control the solenoid.

An engine control system for an auto-stop/start vehicle includes an auto-stop/start module that generates an auto-stop command for shutting down an engine while an ignition is ON and subsequently generates an auto-start command for re-starting the engine. The system includes an actuator control module that disables an engine load, parks exhaust and intake cam phasers, disables fuel, sets a first throttle opening, monitors a crankshaft rotational position, speed, and deceleration, sets a second throttle opening for a predetermined duration if a piston simultaneously crosses a target position below a target engine speed and below a target degrees of rotation remaining, sets a third throttle opening, and determines if an engine speed is below a threshold speed before setting a fourth throttle opening when the engine speed is below the threshold speed, and causes the piston to rest in a predetermined position range.