About 104 results
https://drivepatents.com/patents/944872 · 13 Apr 2016
An abnormality diagnosis apparatus includes: an exhaust gas purification apparatus arranged in an exhaust passage of an internal combustion engine and including a selective catalytic reduction catalyst; a supply apparatus supplying an additive such as ammo...
https://drivepatents.com/patents/946071 · 9 Mar 2016
Diagnostic accuracy is improved when abnormality diagnosis of a particulate filter is carried out by using a PM sensor arranged in an exhaust passage downstream of the particulate filter. An abnormality diagnostic device for a particulate filter includes a...
https://drivepatents.com/patents/954798 · 30 Dec 2015
The present invention relates to an exhaust gas purification device of an internal combustion engine, and effectively increases a NOx purification rate. The exhaust gas purification device includes a DPF (16) that collects PM from an exhaust gas, a urea wa...
https://drivepatents.com/patents/948483 · 7 Oct 2015
An abnormality diagnosing apparatus configured to diagnose abnormality of a fuel injection amount of a diesel engine includes: an oxidation catalyst provided in an exhaust gas passage; an exhaust gas temperature detector configured to detect an upstream-si...
https://drivepatents.com/patents/948794 · 30 Sep 2015
In an exhaust gas purification system 1 in which a DPF 19b is disposed in an exhaust passage 13 of an internal combustion engine 10, a surface filtration cake layer formation enhancement control or a PM generation amount reduction control is temporarily pe...
https://drivepatents.com/patents/949927 · 22 Jul 2015
A thermoelectric generator (13) has a module chamber (32) defined between an exhaust pipe portion (19) and a coolant pipe (23). A thermoelectric conversion module (22) and an HC sensor (35) are located in the module chamber (32). An ECU performs a fault di...
https://drivepatents.com/patents/960082 · 17 Jun 2015
An amount of NOx discharged from an internal combustion engine at the time of reducing the NOx stored in an NOx storage reduction catalyst is decreased. In an exhaust gas purification apparatus for an internal combustion engine which includes an NOx storag...
https://drivepatents.com/patents/952130 · 18 Feb 2015
A catalytic conversion characteristic of a catalyst, which indicates a relationship between an air-to-fuel ratio and a catalytic conversion efficiency of the catalyst, includes a second air-to-fuel ratio point, which is a point of starting an outflow of NO...
https://drivepatents.com/patents/952453 · 4 Feb 2015
The invention relates to a method for determining the efficiency of an exhaust gas purification device (2) of an internal combustion engine, in particular a diesel internal combustion engine (1), in particular for motor vehicles, with a first NOx sensor (7...
https://drivepatents.com/patents/966115 · 17 Dec 2014
Systems and methods are disclosed for diagnosing gain rationality of an NO x sensor that is downstream of a selective catalytic reduction (SCR) catalyst. Sensor diagnostics are performed while maintaining reductant dosing to the SCR catalyst.