A control device is capable of executing: an ignition time calculation process of calculating a target ignition time of an ignition plug; a stop process of stopping combustion control for some cylinders of a plurality of cylinders; and a compensation process of controlling a motor generator during the stop process, such that the motor generator compensates a drive power that is lost due to the stop of the combustion control. The control device prohibits the execution of the stop process when the target ignition time calculated in the ignition time calculation process is on a retard side of a predetermined prescribed time.

Methods and systems are provided for a particulate matter sensor. In one example, the sensor may include a concave inlet for admitting exhaust gas from an exhaust passage downstream of a particulate filter into the sensor.

The present invention refers to a method for operating an internal combustion engine in a transition operating mode, comprising the steps of determining an initial fuel oxidizer ratio threshold and a demanded fuel oxidizer ratio for a fuel mixture to be supplied to a combustion chamber of the engine. If the demanded fuel oxidizer ratio exceeds the initial fuel oxidizer ratio threshold, the engine is temporally operated in a raised response mode, in which a fuel oxidizer ratio threshold is increased from the initial fuel oxidizer ratio threshold to a raised fuel oxidizer ratio threshold, and a fuel mixture having the demanded fuel oxidizer ratio is supplied into the combustion chamber of the engine.

A vehicle and method reduce heating of a particulate filter during a regeneration event in response to an accelerator pedal tip-out and particulate filter temperature exceeding or anticipated to exceed a threshold by fueling the engine to reduce oxygen in the exhaust flowing to the particulate filter. An electric machine may be operated as a generator charging a battery to compensate or offset torque produced by the fueling of the engine. The current or anticipated particulate filter temperature may be estimated by a soot combustion model for a current regeneration event and/or a future regeneration event based on soot loading of the particulate filter.

Provided is an exhaust gas purifying apparatus capable of making a filter entrance temperature reach a target temperature while suppressing excessive temperature increases and release of THC even upon extension of the exhaust path or decreases in outside air temperature. The exhaust gas purifying apparatus includes an oxidation catalyst 18 and a filter 19 that are placed in an exhaust path 5 of an engine 1, a fuel injection device 13 for injecting fuel in accordance with a fuel injection pattern, and a control device 50 configured to be capable of setting the fuel injection pattern including post-injection, wherein an upper-limit value of post-injection quantity increases with decreasing outside air temperature and/or with elongating path length of the exhaust path 5.

A control device of an internal combustion engine including an electronic control unit configured to execute: a base injection amount calculation process of calculating a base value; an injection valve operation process of operating the fuel injection valve; a feedback process of correcting an injection amount in the injection valve operation process; and a determination process of determining whether or not the amount of fuel flowing into the cylinders other than fuel injected from the fuel injection valve is equal to or larger than a threshold value. When it is determined as a result of the determination that the amount of fuel flowing into the cylinders other than the fuel injected from the fuel injection valve is equal to or larger than the threshold value, the electronic control unit (does not execute the process of injecting fuel from the fuel injection valve with the feedback process stopped.

An exhaust system for vehicles and a control method for the system are disclosed. The exhaust system for vehicles includes: a first channel including a plurality of first unit flow paths formed by stacking a plurality of heat exchanger plates provided with heat exchanger fins; a second channel provided in parallel with the first channel and including a plurality of heat exchanger tubes respectively forming a plurality of second unit flow paths having a greater cross-sectional area than a cross-sectional area of the first unit flow paths; an opening and closing unit provided to selectively shield the first channel and the second channel; and a controller provided to control the opening and closing unit according to driving conditions of a vehicle so as to control flows of exhaust gas to the first channel and the second channel.

A system includes an engine adapted to output a torque, a parasitic load adapted to receive a portion of the torque from the engine, and a controller communicably coupled to the parasitic load. The controller is configured to determine an actual exhaust temperature value of an exhaust gas flow exiting the engine and a minimum fuel amount to be injected into the engine. The controller is configured to compare the actual exhaust temperature value with an exhaust temperature threshold value of the exhaust gas flow to determine a first difference between the actual exhaust temperature value and the exhaust temperature threshold value. The controller is configured to determine a target torque output of the engine based on the first difference and the minimum fuel amount. The controller is configured to cause the torque to be increased to attain the target torque output using the parasitic load.

A method may comprise: positioning a pressure control valve (PCV) at an outlet of a fuel rail; positioning a volume control valve (VCV) at an inlet of a high pressure pump; and in response to an exhaust particulate matter (PM) level deviating from a target PM level, adjusting a fuel ratio of a first fuel and a second fuel delivered to an engine, and opening one of the PCV and the VCV. In this way, the fuel oxygen content may be adjusted to maintain a PM at or below a target level without a DPF over a broad range of engine designs and operating conditions, while maintaining fuel economy.

A vehicle includes an engine and a particulate filter that is situated to filter particulates from the exhaust fluid. A controller is configured to implement a sequence of particulate filter regeneration techniques including a first technique during an engine cold start condition, a second technique during a running engine idle condition, and a third technique during a driving condition. The controller is configured to determine whether particulate filter regeneration is desired, implement the first technique when particulate filter regeneration is desired, determine whether particulate filter regeneration is still desired after using the first technique, implement the second technique when regeneration is still desired after using the first technique, determine whether particulate filter regeneration is still desired after using the second technique, and implement the third technique when regeneration is still desired after using the second technique.