An apparatus for controlling exhaust gas purification may include a front unit communicating with an engine exhaust pipe and having a first catalytic filter; a rear unit communicating with the front unit through a connection pipe and having a second catalytic filter and a bypass channel formed to surround the second catalytic filter; and an actuator to open or close the bypass channel. In particular, one end of the bypass channel is opened or closed and other end thereof is sealed so that the second catalytic filter is heated by a primary filtered exhaust gas filtered by and discharged from the front unit.

A method for actuating a heat source for a component of an exhaust system of a drive of a motor vehicle is described. The method includes providing information items relating to a future traveling route of the motor vehicle; ascertaining a chronological sequence of a multiplicity of temperature values in the component within a predefined future time segment, where the ascertainment of the chronological sequence is based on the provided information items; determining a point in time within the time segment on the basis of the ascertained chronological sequence, where a temperature value of the multiplicity of temperature values which is assigned to the point in time is intended to satisfy a predefined criterion; and actuating the heat source before the point in time such that the temperature value satisfies the specified criterion at the point in time.

The invention relates to a method for starting an internal combustion engine, the exhaust gas system of which is equipped with an electrically heatable lambda sensor and a catalytic converter with an oxygen reservoir. The combination of method steps according to the invention allows the internal combustion engine to be started with an optimal raw emission reduction directly after a cold start and an optimal pollutant conversion in the warm-up phase. The invention likewise relates to a motor vehicle with an internal combustion engine comprising an exhaust gas system having an electrically heatable lambda sensor and a catalytic converter with an oxygen reservoir, and comprising a controller, wherein the controller is designed to carry out the method according to the invention.

An ECU 10 for controlling execution of forced regeneration that removes PM deposited on a DPF by increasing a temperature of the DPF in an exhaust gas treatment device of a diesel engine including a DOC disposed in an exhaust passage and the DPF disposed downstream of the DOC includes: a determination unit 102 for determining whether an injection start condition corresponding to a remaining SOF deposition amount on the DOC is satisfied after the forced regeneration starts and after an upstream temperature of the DOC reaches a predetermined temperature; and an injection execution unit 104 for starting late-post injection of fuel to the DOC when the injection start condition is satisfied.

An exhaust gas treatment system (10) for treating exhaust gases (12) of an internal combustion engine of a motor vehicle has an exhaust gas catalytic converter, a pipe piece (14) connected to an input side of the exhaust gas catalytic converter for feeding in exhaust gases (12) of the internal combustion engine, and a heating line (20) that opens into the pipe piece (14) for feeding heating gas (16) into the pipe piece (14) for heating the exhaust gas catalytic converter to the light-off temperature. The heating gas (16) is fed in as a vortex flow that rotates about a longitudinal axis of the pipe piece (14) to achieve homogeneous thorough mixing with the exhaust gas (12) with rapid heating across an entire cross-section of the exhaust gas catalytic converter.

An exhaust gas aftertreatment system for an internal combustion engine has an exhaust system that can be connected to an outlet of the internal combustion engine. A three-way catalytic converter that is situated close to the engine and, downstream from the three-way catalytic converter that is situated close to the engine, a second catalytic converter and a particle reduction device are arranged in the direction in which an exhaust gas of the internal combustion engine flows through an exhaust gas channel of the exhaust system. A fuel injector is arranged on the exhaust gas channel so as to inject fuel downstream from the three-way catalytic converter that is situated close to the engine and upstream from the second catalytic converter, and the exhaust system comprises a secondary air system with which secondary air can be blown into the exhaust gas channel downstream from the three-way catalytic converter that is situated close to the engine and upstream from the second catalytic converter.

Methods and systems are provided for heating an exhaust particulate filter (PF) to enable filter generation. In one example, a method may include adjusting engine air fuel ratio and injecting secondary air flow upstream of the PF to increase PF temperature. The level of engine air fuel ratio adjustment and the amount of secondary air injection upstream of the PF may be adjusted to account for enrichment induced cooling at a three-way catalyst (TWC) positioned upstream of the PF.

A control device for a vehicle comprised of an electric power supply control part controlling the supply of electric power to electrical equipment and an electric power transfer control part controlling the transfer of electric power between a first battery and a second battery. The electric power supply control part supplies the electric power of the second battery to a catalyst device if the electric power which can be output by the first battery is smaller than the total demanded output electric power of the electrical equipment and a need arises to supply electric power to the catalyst device so as to warm up the catalyst device. The electric power transfer control part supplies electric power of the first battery to the second battery if the electric power which can be output by the first battery is larger than the total demanded output electric power of the electrical equipment, the state of charge of the second battery is less than a predetermined first state of charge considered required when using the electric power of the second battery to warm up the catalyst device, and a temperature of the catalyst device is less than a predetermined temperature.

An engine promoting DPF regeneration processing is provided. Catalyst activation processing and thereafter DPF regeneration processing are performed under control of a device. In the catalyst activation processing, a target temperature of exhaust at an exhaust exit of a catalyst is set to be in a first temperature region, and then the opening degree of an exhaust throttle device is controlled. In the DPF regeneration processing, the target temperature is set to be in a second temperature region. A target temperature of the exhaust at an exhaust inlet of a DPF is set to be in a third temperature region. The opening degree of the exhaust throttle device is controlled, and unburned fuel is supplied into the exhaust. The temperature regions are set to be successively higher, and a temperature difference between successive temperature regions is set to be successively lower.

A control apparatus mounted on a diesel vehicle including an oxidation catalyst, a selective reduction catalyst, and a gas sensor includes an activation determination section, a concentration computation section, and a deterioration determination section. The concentration computation section computes the concentration of flammable gas from a sensor output in a period during which the activation determination section determines that the oxidation catalyst is not in the activated state and computes the concentration of ammonia gas from the sensor output in a period during which the activation determination section determines that the oxidation catalyst is in the activated state. The deterioration determination section determines whether or not the oxidation catalyst has deteriorated, on the basis of the concentration of the flammable gas computed by the concentration computation section.