An engine catalyst diagnosis apparatus includes an exhaust passage for discharging exhaust gas from a combustion chamber of an engine, a catalyst device provided on the exhaust passage for purifying the exhaust gas, a linear A/F sensor that is provided on the exhaust passage downstream of the…
Systems and methods for diagnosing at least one component in an exhaust aftertreatment system are provided. Operations to diagnose at least one component include causing an engine to operate through a sequence of a plurality of engine outputs; receiving, from at least one sensor, a first set of…
Systems and methods for using a diesel particulate filter (DPF) heater as a load bank to maintain a minimum exhaust temperature for a diesel oxidation catalyst (DOC) paired with a prime mover are provided. The system includes a prime mover coupled with a generator, a compressor powered by the prime…
A method to control combustion inside the combustion chamber (22) of a burner (21) of an exhaust gas after-treatment system (14) is described. The method provides for placing a first pressure sensor (33, 34) along a first duct (25, 35) of the exhaust gas after-treatment system (14); acquiring the…
Methods and systems using model based and iterative calculations of mass flow throughout an internal combustion engine system. A secondary air injection valve is provided to selectively allow intake air to pass to the exhaust side of the engine system to aid in exothermic reaction with exhaust…
Systems and methods for diagnosing at least one component in an exhaust aftertreatment system are provided. The system includes an exhaust aftertreatment system coupled to an engine system, at least one sensor, and at least one processing circuit structured to: receive initial sensor data…
Systems and methods for diagnosing at least one component in an exhaust aftertreatment system are provided. The system includes an exhaust aftertreatment system coupled to an engine system, at least one sensor, and at least one processing circuit structured to: receive initial sensor data…
A method for controlling an internal combustion engine including at least one exhaust-gas aftertreatment component having an electric heating element, the electric heating element heating the exhaust-gas aftertreatment component and the exhaust gas flowing through the exhaust-gas aftertreatment…
A turbocharger-equipped internal combustion engine includes an exhaust turbine (27), an exhaust filter (84), a differential pressure detector (92), an atmospheric pressure sensor (93), and an electronic control unit (90). The electronic control unit (90) is configured to control the internal…
A turbocharger-equipped internal combustion engine includes an exhaust turbine (27), an exhaust filter (84), a differential pressure detector (92), an atmospheric pressure sensor (93), and an electronic control unit (90). The electronic control unit (90) is configured to control the internal…
Provided is an exhaust gas purification system 1 including a catalyst device 31a configured to recover a purification capacity of a catalyst by an air-fuel ratio richness control, wherein a richness control permission range ± where the air-fuel ratio richness control is permitted to be performed…
When a catalyst temperature T of a catalyst device 31a is at or below a lower limit catalyst temperature Tc, the air-fuel ratio richness control is prohibited. When a first timing ti1 where an estimated value V of a NOx storage amount has reached an enrichment start threshold value Vc and a second…
The invention relates to an exhaust aftertreatment system (A), preferably a modularly constructed exhaust aftertreatment system (A), preferably for a vehicle or a pump or power generation unit, with at least one exhaust module (M1) that has an inlet section (1) and an outlet section (2), wherein at…
The invention relates to an exhaust aftertreatment system (A), preferably a modularly constructed exhaust aftertreatment system (A), preferably for a vehicle or a pump or power generation unit, having at least one exhaust module (M1) which has an inlet section (1) and an outlet section (2), wherein…
The invention relates to an exhaust aftertreatment system (A), preferably a modularly constructed exhaust aftertreatment system (A), preferably for a vehicle or a pump or power generation unit, comprising at least one exhaust module (M1) which has an inlet section (1) and an outlet section (2)…
In an internal combustion engine, an exhaust purification catalyst and a hydrocarbon feed valve are arranged in an exhaust passage. When a temperature of the exhaust purification catalyst falls in a first catalyst temperature region (I), a first NOx purification method is performed, while when a…
In an exhaust gas purification system for an internal combustion engine provided with a filter supporting an SCR catalyst, the present invention is intended to suppress HC and CO from being discharged to the outside at the time of the execution of filter regeneration processing, and to carry out…
The invention relates to an exhaust aftertreatment system (A) with an exhaust module (M1) that has an inlet section (1) and an outlet section (2). The exhaust aftertreatment system (A) is characterized in particular in that it has at least one sensor fastening device (3.1, 3.2) that comprises at…
In order to provide a thermal-type flowmeter highly accurate, with high reliability, and simple in construction, while being available at a lower price, a thermal-type flowmeter as proposed includes a sub-path that takes in a fluid under measurement; a sensor element that measures a flow-rate of…
An exhaust gas treatment system for an internal combustion engine has a reluctant delivery system that delivers reductant to an exhaust stream in an exhaust aftertreatment system. A temperature sensor is positioned in or near the flow of reductant and exhaust to measure the temperature of the…
[OBJECT] To prevent hunting without providing a bypass route in an engine with a denitration reactor installed upstream of a turbine. [MEANS] Providing a pressure gauge 7a to detect a scavenging pressure Ps within a scavenging trunk 6, a motor 8a to assist or dampen a driving of the turbocharger, a…
The purpose of the present invention is to provide a DPF travel-time regeneration control system of stably raising the temperature even during travel and capable of decreasing the frequency of DPF regeneration when the vehicle is stopped. In this control system, if the DPF (5) needs to be…
Provided is a competence diagnosis system for a urea water temperature sensor that can limit a diagnosis during a cold start. A competence diagnosis system for a urea water temperature sensor 129 includes a competence diagnosis unit 127 that diagnoses a failure of a temperature sensor 121 provided…
Disclosed is an internal combustion engine control device that includes a particulate matter sensor (2) which has a pair of electrodes (8, 10) disposed at a distance from each other and measures the amount of particulate matter in a gaseous body, and elimination means (16) for burning and…
It is an object of the present invention to easily executing a careful work which is executed on the basis of an engine sound. An exhaust gas purification system of a working machine according to the present invention is provided with an engine 70 which is mounted to the working machine 140, an…
An exhaust device of an internal combustion engine includes a burner device (40) including a fuel addition device (15) for adding fuel to an exhaust passage (12) of the internal combustion engine (1), and igniting the added fuel, and a controller (50) which detects an abnormal condition of the…
The present invention provides a DPF failure detection method and a DPF failure detection device, which can be realized with a simple configuration and detect a failure at low cost. The theoretical deposited amount of PM on a DPF 4 is calculated from the operating state of an internal combustion…
A method of updating a pressure law (P-LAW) providing the exhaust pressure (P) as a function of the exhaust gas flow rate (Q); the following steps are included: measuring a first current intensity (Ip) of a UEGO sensor (13), under conditions of pure air and at a reference exhaust pressure (P)…
A particulate filter ash loading prediction method, including the steps of: regenerating the particulate filter (20) using a first soot loading prediction model or a second soot loading prediction model; determining whether the regeneration of the particulate filter (20) was initiated by the first…
A filter (6) collecting particulate matter in exhaust gas is provided in an exhaust path of an engine. A proximal thermosensor (2) and an entire-area thermosensor (3) are provided downstream of the filter (6). A position of the proximal thermosensor (2) is set to a position in proximity to a…