The present invention relates to a differential pressure sensor. The differential pressure sensor includes: a housing including a body and a cover, the housing having a first chamber and a second chamber defined in the housing and separated from each other; a first pressure channel communicating with the first chamber; a second pressure channel communicating with the second chamber; a substrate on which an electronic component is mounted and in which a terminal is formed, the substrate including a first surface facing the first chamber and a second surface extending parallel to the first surface and facing the second chamber, the substrate configured to cover the second chamber; a sensor element installed on the first surface of the substrate so as to generate an electric signal corresponding to a pressure difference between the first chamber and the second chamber; a lead frame installed in the housing with one end thereof extending into the first chamber, the lead frame configured to transmit the electric signal of the sensor element to an external device; a conductive wire configured to connect the terminal of the substrate and the lead frame so as to transmit the electric signal of the sensor element to the lead frame; a first sealing member disposed in a region where the body and the cover make contact with each other, the first sealing member configured to seal the first chamber with respect to the outside; and a second sealing member disposed in a region where the substrate and the body make contact with each other, the second sealing member configured to seal the second chamber with respect to the first chamber.

A method is provided for determining exhaust mass flow through a diesel particulate filter (DPF) in an engine arrangement including an engine and an exhaust after treatment system (EATS) comprising the DPF. The method comprises determining soot loading and soot distribution in the DPF, measuring pressure drop over the DPF, measuring pressure in the DPF, measuring temperature in the DPF, and determining exhaust mass flow through the DPF as a function of the measured pressure drop, the measured pressure, the measured temperature, and the soot loading and soot distribution. An arrangement is also provided for determining exhaust mass flow through a diesel particulate filter. A method for controlling one or more engine components, and an engine, are also provided.

A turbocharger-equipped internal combustion engine includes an exhaust turbine, an exhaust filter, a differential pressure detector, an atmospheric pressure sensor, and an electronic control unit. The electronic control unit is configured to control the internal combustion engine such that accumulation amount of a particulate matter in the exhaust filter is regulated. The electronic control unit is configured to control the internal combustion engine such that the accumulation amount of the particulate matter in the exhaust filter is increased, when the pressure difference detected by the differential pressure detector is a lower limit or less. The electronic control unit is configured to set the lower limit such that the lower limit becomes a higher value as the atmospheric pressure detected by the atmospheric pressure sensor becomes lower.

A system and method of reducing particulate matter accumulation in a diesel particulate filter of an exhaust system of a vehicle comprises operating the vehicle including an engine connected to the exhaust system in a drive mode. At least one parameter indicative of particulate matter accumulation in the diesel particulate filter is monitored and evaluated against a predetermined particulate matter accumulation limit. Control logic determines at least one operating parameter of the vehicle and adjusts the transmission assembly from a first transmission position to at least one second transmission position to increase engine speed and generate higher exhaust gas flow when the particulate matter accumulation is greater than the predetermined particulate matter accumulation to regenerate the diesel particulate filter.

A system for identifying a modification of a component in an exhaust gas line of a motor vehicle, includes a particulate filter, a diagnostic system, a first temperature sensor, a second temperature sensor, and an evaluation unit. The evaluation unit is configured to receive from the first temperature sensor a first temperature variable which is characteristic of a first exhaust gas temperature and to receive from the second temperature sensor a second temperature variable which is characteristic of a second exhaust gas temperature. The evaluation unit is also configured to compare the temperature variables or comparison variables which are derived therefrom with each other. Depending on the comparison, the evaluation unit is also configured to determine a modification of the particulate filter.

An exhaust gas purification system of engine configured to classify a PM accumulation state of DPF into multiple evaluation stages based on a plurality of evaluation indices, and to repeatedly perform determination of the current evaluation stage by the current stage determination part and determination of whether to move up the current evaluation stage to the evaluation stage of the next rank by the evaluation stage determination part, wherein upon a defect of a sensor among different types of sensors being detected by the defect detection part, the current evaluation stage is newly redetermined by the current stage redetermination part as substituted for the current evaluation stage determined by the current stage determination part.

An under-floor catalyst (33) includes a GPF (41) capable of trapping fine exhaust particles in exhaust gas, and a downstream-side catalyst (42) positioned on the downstream side of GPF (41). GPF (41) can be supplied with secondary air. When an internal combustion engine (10) is stopped during travel, the secondary air is supplied to GPF (41) in which the fine exhaust particles are accumulated. At this time, the temperature of GPF (41) is equal to or higher than a predetermined temperature. Thus, a deterioration in the exhaust gas purification performance of under-floor catalyst (33) at the time of the start of internal combustion engine (10) can be suppressed.

An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to simultaneously receive sensor values from the first sensor and receive sensor values from the second sensor.

A filter (30) traps particulate matter in an exhaust gas. A filter inlet side pressure sensor (34) is provided in an inlet side of the filter (30). An EGR valve inlet side pressure sensor (22) is provided in an inlet side of an EGR valve (20). A regeneration controller (38C) determines whether or not the filter inlet side pressure sensor (34) is in failure based upon a difference between a pressure value detected by the filter inlet side pressure sensor (34) and a pressure value detected by the EGR valve inlet side pressure sensor (22). When the filter inlet side pressure sensor (34) is in failure, the regeneration controller (38C) performs control of regeneration treatment using a differential pressure calculated based upon a pressure value detected by the EGR valve inlet side pressure sensor (22) and a pressure value detected by the filter outlet side pressure sensor (35).

A method for operating a device that conveys a fluid includes: A) detecting activation of the device; B) filling a conveying line with the fluid by operating at least one pump in a conveying direction from at least one tank to at least one injector, and detecting complete filling of the conveying line based on at least one sudden pressure increase at at least one pressure sensor; C) operating the pump and making available fluid at the injector; D) detecting deactivation of the device; and E) partially emptying the conveying line by sucking back the fluid by operation of the at least one pump in a direction counter to the conveying direction. The emptying is stopped if pressure measured at the at least one pressure sensor corresponds to an ambient pressure.