| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073114760 | Exhaust pressure | 14 |
| 20090188309 | PROCEDURE FOR DIAGNOSING AN EXHAUST GAS TREATMENT DEVICE AND DEVICE FOR IMPLEMENTING THE PROCEDURE - Procedures for diagnosing an exhaust gas treatment device, which is dosing a reagent into the exhaust gas area of a combustion process, whereby the reagent is brought up to a dosing pressure and subsequently dosed, at which the diagnosis is undertaken with the aid of an evaluation of a pressure drop of the reagent, and a device for implementing the procedure are suggested. After turning off the pump a pressure drop that occurs afterwards is evaluated. The evaluation of the pressure drop considers a leakage loss of the pump. | 07-30-2009 |
| 20090211351 | PORTABLE VEHICLE EXHAUST FLOW SENSOR - A portable exhaust gas flow sensor includes a tube for coupling to an exhaust pipe of a vehicle and having a thin screen or similar flow restricting element to induce a pressure drop based on the exhaust gas flow with an upstream port and a downstream port relative to the flow restricting element connected to a differential pressure transducer. A thermocouple extends through a temperature port to measure exhaust gas temperature flowing through the tube. A processor in communication with the thermocouple and the differential pressure transducer determines the exhaust gas flow based on the differential pressure and the temperature. The flow restricting element includes sufficient spaces to resist formation of condensation and minimize added back pressure while providing an accurately measurable pressure drop for flows ranging from idle to full throttle. | 08-27-2009 |
| 20100037684 | METHODS OF DETECTING REPLACEMENT OF A PARTICULATE MATTER FILTER - Methods of monitoring replacement of a diesel particulate filter (DPF) by a non-particulate matter filter. The disclosed methods takes into account a change in delta pressure based soot load estimates (DPSLE) over time to detect whether the DPF has been replaced. The estimate, which is measured by the delta pressure drop across the filter, can be used to determine whether a device that does not have the capability of trapping soot, such as a muffler, has been inserted. | 02-18-2010 |
| 20100037685 | NON OBSTRUCTIVE PRESSURE DIFFERENTIAL VALVE - A pressure differential valve apparatus that includes a valve, the valve having a valve head and a valve stem connected perpendicular to the valve head, the valve head having a valve face with an opening that continues inside an interior of the valve head to an intersection with the valve stem and along a length of the valve stem to a top of the valve stem, wherein the apparatus allows unobstructed pressure readings when the valve face is rotated in a radial direction within an area of flow of a cylinder head. | 02-18-2010 |
| 20100139382 | METHOD FOR EVALUATING THE PLAUSIBILITY OF A PRESSURE DIFFERENCE VALUE DETERMINED ACROSS A PARTICLE FILTER - In a method for achieving plausibility of a pressure difference value by means of a particle filter, a pressure difference value is allocated to each charging pressure of the internal combustion engine. As a result, the identification of a faulty pressure difference value occurs when the detected pressure difference value is outside a limit range of the detected charging pressure value. | 06-10-2010 |
| 20100212417 | EXHAUST TREATMENT DIAGNOSTIC SYSTEM AND METHOD - A method and system for monitoring operation of an exhaust treatment system of a diesel engine includes a dosing system including an injector for injecting an injection fluid and a pump for pressurizing the injection fluid. The system also includes a pressure sensor in communication with the dosing system generating a pressure signal. The system further includes a control module that determines a pressure error signal in response to the pressure signal and generates a fault signal in response. | 08-26-2010 |
| 20120192635 | EXHAUST GAS PRESSURE LOSS CALCULATION DEVICE FOR ENGINE - An object of the present invention is to provide a corrected exhaust gas pressure loss calculation device which corrects an exhaust gas pressure loss that varies from moment to moment in accordance with engine operating conditions to a corrected exhaust gas pressure loss that can be used directly in control. The present invention converts an exhaust gas pressure into the corrected exhaust gas pressure loss, which is an exhaust gas pressure loss under a reference condition, from a relationship between an exhaust gas mass flow rate and an exhaust gas mass flow rate under the reference condition, a relationship between an exhaust gas temperature and an exhaust gas temperature under the reference condition, a relationship between the exhaust gas pressure and an exhaust gas pressure under the reference condition, and a relationship between an exhaust gas viscosity coefficient under a condition of the exhaust gas temperature and a viscosity coefficient of a viscous gas under the reference condition. | 08-02-2012 |
| 20120260724 | EXHAUST PRESSURE DETECTOR - The present invention relates to an exhaust pressure measuring device, and more particularly, to an exhaust pressure measuring device that allows measurement of a change of pressure in an exhaust line in order to prevent problems caused by clogging of an exhaust line at a outletside of a dry pump and at an inletside of a scrubber, and an exhaust line at a outletside of the scrubber in a semiconductor or LCD apparatus in advance. | 10-18-2012 |
| 20120304752 | SENSOR SYSTEM FOR DIFFERENTIAL PRESSURE MEASUREMENT - Techniques disclosed herein include systems and methods for sensor systems for measuring pressure in an exhaust conduit of a combustion engine. The sensor system includes an electronics module assembly and a housing assembly for housing the electronics module assembly. The electronics module assembly can include several components such as sensing element carrier element with a sensing element, an electronics module carrier element carrying electronic components. Electrical connections can be provided between the electronic module carrier element and the sensing element carrier element. Another component includes a main carrier element for supporting the sensing element carrier element and the electronic module carrier element. | 12-06-2012 |
| 20130340514 | Pressure Sensor Apparatus - To implement a downsized pressure sensor apparatus, a pressure sensor apparatus of the present invention includes a housing including a first pressure introduction passage for introducing a first pressure and a second pressure introduction passage for introducing a second pressure, a first pressure detection element provided in the housing and configured to detect the pressure introduced from the first pressure introduction passage, and a second pressure detection element provided in the housing and configured to detect the pressure introduced from the second pressure introduction passage, wherein a circuit substrate is placed above the first and second pressure detection elements, and a first intermediate terminal configured to electrically connect the first pressure detection element with the circuit substrate and a second intermediate terminal configured to electrically connect the second pressure detection element with the circuit substrate are inserted into the housing. | 12-26-2013 |
| 20140090460 | PARTICULATE COLLECTION FILTER STATE DETECTION DEVICE - A particulate collection filter state detection device according to the present invention includes first pressure detection means for detecting a first pressure produced at an upstream side of the filter on an exhaust gas flow path, second pressure detection means for detecting a second pressure produced at a downstream side of the filter on the exhaust gas flow path, first Fourier transformation means for applying Fourier transformation to a value of the first pressure detected by the first pressure detection means, second Fourier transformation means for applying Fourier transformation to a value of the second pressure detected by the second pressure detection means, comparison means for comparing a spectral intensity and/or a phase at a zero frequency and a spectral intensity and/or a phase at a predetermined frequency obtained by the first Fourier transformation means and a spectral intensity and/or a phase at a zero frequency and a spectral intensity and/or a phase at a predetermined frequency obtained by the second Fourier transformation means, and filter state determination means for determining a state of the filter based on a comparison result provided by the comparison means, so as to conduct determination of a state of a filter for collecting particulates in an exhaust gas at a good precision. | 04-03-2014 |
| 20140245823 | METHOD FOR CHECKING A FUNCTION OF AN OUTLET VALVE - A method for checking a function of an outlet valve of an internal combustion engine includes sensing an exhaust gas pressure in an exhaust section of the internal combustion engine. The sensed exhaust gas pressure is compared with a comparison value so as to provide a comparison result and the function of the outlet valve is evaluated as a function of the comparison result. | 09-04-2014 |
| 20150369700 | DIAGNOSIS OF THE CONDITION OF A PARTICLE FILTER - An on-board diagnostic for a particle filter of a vehicle exhaust system records repeating data about flow and pressure around the particle filter. Data is recorded in virtual data bins having successive thresholds or filters within a numerical scale. Each data point is typically recorded in several bins to permit a rapid calculation of averaged data for use in the diagnostic. Sensitivity of less frequently recorded data is preserved, whilst giving quickly delivery of a result from the diagnostic. | 12-24-2015 |
| 20160084137 | ON-BOARD DIAGNOSTIC METHODS FOR PARTIAL FILTRATION FILTERS - A system for and method of diagnosing operation of a partial filtration filter exhaust aftertreatment system are provided. An upstream exhaust temperature value is determined in an exhaust system upstream of at least one of a diesel oxidation catalyst (DOC) component and a first partial flow filter (PFF) component. A downstream exhaust temperature value is determined in the exhaust system downstream of a second PFF component positioned downstream of the at least one of the DOC component and the first PFF component. A frequency difference is determined between a first frequency content of the upstream exhaust temperature value and a second frequency content of the downstream exhaust temperature value. If the frequency is less than a predetermined threshold, it is determined that at least one of the DOC component and the PFF component are not present in the exhaust system. | 03-24-2016 |
