Abstract: An exhaust gas control apparatus includes a fuel injection device, a NOx occlusion reduction catalyst, a fuel addition valve, an inflow gas adjustment device, and an electronic control unit. The electronic control unit executes a low flow rate reduction treatment for removing NOx occluded in the NOx occlusion reduction catalyst after fuel supply from the fuel injection device is stopped. The electronic control unit controls the inflow gas adjustment device such that a ratio of oxygen to the fuel added to the NOx occlusion reduction catalyst at a time when a temperature of the NOx occlusion reduction catalyst is below an activation temperature becomes higher than a ratio of oxygen to the fuel added to the NOx occlusion reduction catalyst at a time when the temperature of the NOx occlusion reduction catalyst is equal to or higher than the activation temperature during the low flow rate reduction treatment.

Abstract: The present invention relates to a method for restricting work produced in a combustion chamber, wherein a substance resulting from combustion is reduced by supplying additive comprising a reagent to the exhaust gas stream. The method comprising: determining if a quality of said additive, estimated by means of a first sensor, being subjected to said additive, is below a first quality; determining if signals from a second sensor, being subjected to the exhaust gas stream, indicate insufficient reduction of said at least one substance; determining if a correction of the supply of additive has reached an upper limit; and restricting work produced by combustion only when: said estimated quality of said additive is below said first quality, said correction has reached said upper limit, and said measurement in the exhaust gas stream indicates insufficient reduction.

Abstract: A cooler for a vehicle includes: a cooler housing; tubes disposed inside the cooler housing; cooling pins arranged inside the tubes in a predetermined pattern; and a cup plate attached to both ends of the cooler housing, including a first core material and a first bonding layer bonded at both outer surfaces of the first core material, and having a plurality of slots penetrating the first bonding layer and the first core material in a thickness direction. Each of the tube has an end part penetrating each of the slots and includes a second core material and a second bonding layer that is in contact with an interior surface of the slots, the second bonding layer is in contact with the first bonding layer and the first core material, and the first bonding layer includes a material having a corrosion potential lower than that of the second bonding layer.

Abstract: A fuel delivery system for a vehicle having an engine configured to selectively operate between a port fuel injection (PFI) mode and a gasoline direct injection (GDI) mode includes a PFI fuel rail having a plurality of PFI injectors configured to supply fuel to the engine during the PFI mode, a GDI fuel rail having a plurality of GDI injectors configured to supply fuel to the engine during the GDI mode, a first GDI fuel supply line fluidly coupled to the GDI fuel rail, a first deactivating GDI fuel pump assembly disposed on the first GDI fuel supply line. The first deactivating GDI fuel pump assembly is configured to selectively transition between an activated mode and a deactivated mode.

Abstract: An object of the disclosure is to provide a technology that enables abnormality diagnosis of an NOx trap catalyst to make the diagnosis that the NOx trap catalyst is abnormal even if the degree of deterioration of the NOx trap catalyst is relatively small yet. When performing abnormality diagnosis of an NOx trap catalyst, a system according to the disclosure performs a lean temperature raising process, which is the process of raising the temperature of the NOx trap catalyst to or above a predetermined temperature while keeping the air-fuel ratio of the exhaust gas flowing into the NOx trap catalyst at a lean air-fuel ratio. The system diagnoses abnormality of the NOx trap catalyst on the basis of the NOx storage efficiency of the NOx trap catalyst or a parameter correlating with that NOx storage efficiency after the completion of the lean temperature raise process.

Abstract: Methods and systems are provided for waking up a powertrain control module of an engine-driven vehicle during engine soak to perform an offset test of an exhaust NOx sensor. In one example, a method includes determining a duration to delay waking up the powertrain control module based on exhaust temperature at vehicle-off, waking up the powertrain control module after the duration has expired, and then initiating heating of the NOx sensor. After the NOx sensor lights off, heating continues for an additional duration before offset testing of the NOx sensor is performed.

Abstract: A method and system for regenerating a soot particle filter of an internal combustion engine is disclosed. The engine control unit determines a pressure difference from a differential pressure signal received from a differential pressure sensor, which pressure difference is present between an exhaust gas inlet and an exhaust gas outlet of the soot particle filter. The method compares the pressure difference to a pressure difference threshold value and operates the combustion engine in a regeneration operating profile if the determined pressure difference is smaller than the pressure difference threshold value. If the determined pressure difference is greater, a differential pressure correction device is connected between the differential pressure sensor and the engine control unit and a differential pressure simulation signal is generated by the differential pressure correction device and transmitted to the engine control unit to operate the internal combustion engine in the regeneration operating profile.

Abstract: An engine system includes: an engine including a plurality of combustion chambers generating driving torque by combustion of fuel; an exhaust gas purification apparatus installed at an exhaust line in which exhaust gas exhausted from the combustion chambers flows; a bypass line branched from the exhaust line at an upstream side of the exhaust gas purification apparatus and joining the exhaust line at a downstream side of the exhaust gas purification apparatus so that the exhaust gas flowing in the exhaust line bypasses the exhaust gas purification apparatus; and a bypass valve installed at the bypass line.

Abstract: A concentration calculation apparatus, system and method which can compute a correction value for correcting an ammonia sensor output at a timing other than the time of fuel cut. A multi-gas sensor control apparatus (9) of a urea SCR system (1) begins recording (storing) a downstream NOx output value Sn and downstream ammonia output value Sa detected by a multi-gas sensor (8) (S120) when the control apparatus determines that a DPF regeneration process is currently being performed (an affirmative determination in S110). The apparatus (9) computes a downstream ammonia converted value Ca using a peak value of the downstream NOx output value Sn (S170), and calculates a Gain correction coefficient based on a comparison of the downstream converted value Ca and the output value Sa (S180). As a result, the Gain correction coefficient can be computed in accordance with the state of the ammonia detection section (202).

Abstract: The present invention relates to a method for determining when to correct supply of additive to an exhaust gas stream resulting from combustion in at least one combustion chamber, wherein the additive is arranged for reduction of at least one substance resulting from said combustion by supplying the additive to an exhaust gas stream resulting from said combustion. The quantity of additive being supplied is subjectable to correction, and a sensor is subjected to the exhaust gas stream and arranged to measure occurrence of said at least one substance. The method comprises: by means of sensor signals from said sensor, determining a level of occurrence of said first substance in said exhaust gas stream, and determining when to correct said supply of additive on the basis of said occurrence of said first substance in said exhaust gas stream.

Abstract: An exhaust heat recovery device according to one aspect of the present disclosure includes a main flow path, a secondary flow path, a plurality of heat exchangers, and a communication portion. Exhaust gas flows in the main flow path. The secondary flow path is a flow path branched from the main flow path, and at least a portion of the exhaust gas flows in the secondary flow path. The plurality of heat exchangers are arranged in the secondary flow path. The communication portion communicates with the plurality of heat exchangers and constitutes a portion of the secondary flow path. The communication portion is provided with an exhaust gas outlet which is an outlet for exhaust gas used for exhaust gas recirculation.

Abstract: A fuel injection controller for an internal combustion engine selects as the injection mode either single injection or split injection, counts, based on a drive current detection signal, which indicates that a drive current is generated to be fed to the direct injector, the number of occurrences of the drive current in one combustion cycle as a number-of-injections count value, and determines, based on the number-of-injections count value, whether the combustion state in the cylinder is satisfactory. The fuel injection controller determines that the combustion state in the cylinder is unsatisfactory if the number-of-injections count value in one combustion cycle is one when catalyst warm-up control is being performed with the temperature of the engine being lower than or equal to a predetermined temperature.

Abstract: A particulate matter detection apparatus is provided with an element portion onto which PM contained in exhaust gas of an engine adheres thereto. A heater which heats the element portion, a quantity detecting portion which detects a quantity of the PM based on electrical properties of the element portion and a temperature detecting portion which detects a temperature of the element portion. The apparatus is further provided with a first and second temperature controller. The first temperature controller heats the element portion using a heater in a first period, which excludes a period in which PM adheres to the element portion based on a detected temperature of the element portion. The element portion is heated in a first temperature range to combust soluble organic fractions contained in the PM and resist melting of ash components contained in the PM. The first period excludes a period in which PM adheres to the element portion.

Abstract: A urea sensor protection assembly for protecting a fluid sensor of a urea sensor system comprises an inner cage supporting the fluid sensor and an outer cage. The inner cage has a first fixation element fixing the inner cage to a common holder. The outer cage has a filter capable of blocking a plurality of air bubbles and/or allowing a fluid to pass and a second fixation element fixing the outer cage to the common holder. The inner cage is at least partially arranged in an inner volume of the outer cage in an assembled state.

Abstract: Systems and methods are provided for feedgas diagnostics in a selective catalytic reduction (SCR) system. An example electronic system may be part of on-board diagnostic (OBD) functionality in a diesel fuel vehicle and may comprise circuits for defining and managing system conditions for hydrocarbon dosing, adjusting the dosing to a diesel oxidation catalyst (DOC) while the system is in operation, and defining a diagnostic framework based at least on exothermic properties of various components of a DOC such that a DOC may be monitored for failure and/or end of useful life (EUL). The electronic system may include a tuning circuit for calibrating the diagnostic framework.

Abstract: Methods and systems are provided for a PM sensor. In one example, a method comprises flowing exhaust gas to a cone-shaped PM sensor having a pair of openings arranged across from one another and a plurality of outlets distal to the pair of openings.

Abstract: Provided is a control device for an internal combustion engine. The internal combustion engine includes cylinders, intake ports, exhaust ports, intake values, exhaust valves, fuel injection valves, and an exhaust valve stop mechanism. The control device includes an electronic control unit configured to control the fuel injection valves so as to inject the feel into the some cylinders at least during a period of time of a compression stroke or an expansion stroke of the some cylinders, control the exhaust valve stop mechanism so as to stop the exhaust valves of the exhaust ports of the some cylinders in a valve-closed state, and control the intake valves so as to open the intake valves at least during a period of time of an intake stroke of the some cylinders such that exhaust gas is recirculated to each of the cylinders via the intake ports of the some cylinders.

Abstract: An apparatus and method of cooling an engine exhaust generated by an engine of a work machine having a hydraulically operated implement. The work machine includes an emission control system and a cooling system having an oil cooling system configured to cool an oil of a hydraulic system and an engine cooling system configured to cool an engine coolant circulating through the engine. An exhaust pipe, coupled to the emission control system and configured to direct engine exhaust, includes an outlet disposed in a space located between an oil cooler of the oil cooling system and a radiator of the engine cooling system. An air displacement device is configured to draw air into and away from the oil cooler and the radiator and to draw the exhaust from the exhaust pipe. Exhaust from the exhaust pipe is drawn past the oil cooler and the radiator to cool the exhaust.

Abstract: A vehicular urea pump module includes a structure capable of preventing urea from permeating into electrical elements such as a pump, a heater, and a sensor of the urea pump module; a structure capable of easily defrosting frozen urea; a structure of separating foreign substances; a structure of reducing vibration noise; a structure of enabling the discharge and suction of urea using a single pump; and a structure of increasing the efficiency of assembly for ease of assembly of respective elements.

Abstract: A method for diagnosing a quality signal (26). The quality signal (26) is provided by a quality sensor (24) used in a reagent metering system (10). The reagent metering system (10) meters a urea/water solution (14) stored in a tank (12), the quality of which is checked by the quality sensor (24), upstream of an SCR catalytic converter (20).