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7578179 |
Exhaust gas simulation system with dual path temperature control for control of exhaust temperature
A temperature control system and method for use with an exhaust flow simulation system. A typical exhaust flow simulator is a burner-based system, in which exhaust from a combustive burner is...
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7562565 |
Procedure and control unit to diagnose a secondary air system
A procedure is introduced to test the functional capability of a secondary air system of an internal combustion engine, wherein values of a pressure are acquired, which arises in the secondary air...
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7549317 |
Particle-based flow sensor
A fluid conveyance apparatus having more than one particulate matter sensing probe situated at two or more locations on the apparatus. Signals from the probes from at least two locations may...
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7546761 |
Diesel oxidation catalyst (DOC) temperature sensor rationality diagnostic
A temperature sensor rationality control system for an exhaust treatment system having an oxidation catalyst includes an oxidation catalyst inlet temperature sensor that generates an inlet...
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7523653 |
Exhaust temperature sensor monitoring
A system for diagnosing an exhaust temperature sensor in an engine exhaust, the exhaust further including an emission control device, the system comprising an exhaust temperature sensor disposed in...
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7461545 |
Method and apparatus for monitoring cyclic variability in reciprocating engines
A method and apparatus is presented for monitoring the cyclic variability of combustion or one or more cylinders of a reciprocating internal combustion engine. Exhaust temperature signals are...
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7316157 |
Device and method for estimating temperature of exhaust pipe of internal combustion engine
A device for estimating a temperature of an exhaust pipe of an engine includes: a first obtaining section for obtaining a first heat amount that the exhaust pipe receives per unit time from exhaust...
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7299690 |
Particulate sampling system and method
A method for controlling the flow through an exhaust sampling system includes sensing an operating characteristic of a power source, extracting a sample of an exhaust flow of the power source,...
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7281440 |
Particulate sampling system having flow check device
A particulate sampling system is disclosed. The particulate sampling system may include an exhaust sampling unit and a dilution flow assembly to supply dilution air to the exhaust sampling unit....
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7261095 |
Method for determining the temperature downstream the entry of a catalytic converter for a turbocharged engine
This method for determining, in a turbocharged engine, the temperature of the exhaust gases downstream of the turbine of the turbocharger, comprises the following steps:
determining the...
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7243489 |
Method and apparatus for monitoring engine performance as a function of soot accumulation in a filter
A method of monitoring engine performance as a function of soot accumulation in a particulate filter includes determining characteristics of soot accumulation in the filter, analyzing the...
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7231291 |
Apparatus, system, and method for providing combined sensor and estimated feedback
An apparatus, system, and method are disclosed for providing system feedback from combined input values in a sensor-based control system wherein the reliability of a sensor response is questionable...
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7188512 |
Apparatus, system, and method for calibrating a particulate production estimate
An apparatus, system, and method are disclosed for calibrating an estimate of the status of a mechanism or process, for example, particulate production from a diesel engine. A first estimator makes...
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7174779 |
Method for aging catalyzed particulate filter system
Disclosed herein is an aging method which can support an aging test for a catalyzed diesel particulate filter system through the post-injection of fuel according to a regeneration logic for a...
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7155332 |
Method for obtaining exhaust gas flow quantity, exhaust gas flow measurement apparatus, and exhaust gas recirculation control system
An exhaust recirculation control system of the internal combustion engine computes an oxygen concentration in total intake air containing recirculation exhaust gas in a cylinder and the ratio...
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7139658 |
Apparatus detecting abnormality of exhaust system of internal combustion engine
An engine ECU executes a program including the steps of: detecting an air intake; subtracting an air fuel ratio detected by an upstream air fuel ratio sensor from that detected by a downstream air...
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7110878 |
Method and apparatus for measuring exhaust gas flow rate and it's application system for analyzing the exhaust gases from an engine
A differential pressure type emission flow rate measuring method and apparatus and an emission measuring system are capable of correcting measuring error occurring due to pulsation appropriately...
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7047728 |
Apparatus for and method of controlling air-fuel ratio of internal combustion engine, and recording medium storing program for controlling air-fuel ratio of internal combustion engine
A target value Vtgt for an output Vout of an O 2 sensor 8 (an exhaust gas sensor) disposed downstream of a catalytic converter 4 is set variably depending on a temperature T O2 of an active...
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7021130 |
Method and device for the measurement of exhaust gas from internal combustion engines
A Method and device for the measurement of exhaust gas from internal combustion engines using a full-flow dilution method in which the exhaust volume flow is mixed with dilution air so that in...
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7017399 |
Predictive analysis method and system for engine performance and control program for use in the same
In a computer system for analyzing the flow of an intake/exhaust gas of, for example, a four-cycle multi-cylinder engine through application of CFD, the dimension of a space where the flow of the...
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6993428 |
Detecting leakage of engine exhaust gas using exhaust mass flow measurement
An internal combustion engine has cylinders within which combustion occurs and an exhaust system through which products of combustion are exhausted from the cylinders. A temperature sensor and an...
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6957527 |
Device and method for estimating catalytic temperature
A device for periodically estimating the temperature of an exhaust-gas purifying catalyst provided in the exhaust pipe of an internal combustion engine. The device includes first, second, third,...
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6952953 |
Method and device for monitoring a sensor
A device and a method for monitoring a sensor for an exhaust-gas after-treatment system, in particular a temperature sensor. In specified operating states, a first signal from the first sensor to...
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6915203 |
Apparatus and method for diagnosis of vehicular system
An engine control system has a self-diagnosis function of an exhaust system. The self-diagnosis function includes a first mode for detecting a failure or abnormality of the exhaust system as a...
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6912480 |
Method and apparatus for determining the mass flow through an engine
A method for determining the total mass flow through an engine ( 10 ) comprises measuring ( 32 ) the fuel flow to the engine ( 10 ) and measuring the concentration of carbon dioxide in the gases...
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6910371 |
Extended durability sensing system
The present invention provides a sensing system for monitoring an environment that includes at least two sensors and a control unit in communication with the sensors. At least one of the sensors is...
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6880329 |
Exhaust gas purifying system for internal combustion engines
A first oxygen sensor is mounted on an exhaust pipe. An ECU determines an electric power to be fed to a sensor heater, by a heater control quantity calculating block, in accordance with a...
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6877366 |
Test method for an exhaust gas catalytic converter and a corresponding testing device
A test method for an exhaust gas catalytic converter ( 8 ) of an internal combustion engine ( 1 ) comprises the steps of: test injection of fuel during the expansion stroke and/or during the...
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6877369 |
EGR-gas flow rate estimation apparatus for internal combustion engine
An EGR-gas flow rate estimation apparatus for an engine including an exhaust circulation pipe connected between an exhaust passage and an intake passage of the engine, and an EGR control valve...
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6862927 |
Filters for engine exhaust particulates
The regeneration responses of diesel engine exhaust filters are mapped by conducting multiple regeneration runs under controlled conditions of soot loading, exhaust temperature, exhaust flow rate,...
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6860144 |
Oxygen sensor monitoring arrangement
A non-intrusive method and arrangement for detecting the aging of an oxygen sensor, without increasing tailpipe emissions, is provided. The method detects an aging oxygen sensor, located between a...
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6848300 |
Method and appliance for diagnosis of an exhaust turbocharger for an internal combustion engine
In a method for diagnosis of an exhaust turbocharger for an internal combustion engine, at least one value which characterizes the load on the exhaust turbocharger is determined and compared with a...
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6845314 |
Method and apparatus for remote communication of vehicle combustion performance parameters
An apparatus for remote identification of the combustion performance of a vehicle is provided. The apparatus comprises a throttle device for control of fuel into an engine of a vehicle. A...
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6823722 |
Adsorbent state determining apparatus
An adsorbent state determining apparatus is provided for accurately determining the state of an adsorbent including a deterioration while ensuring elimination of the influence of impurities...
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6796165 |
Apparatus and method for real-time measurement of mass, size and number of solid particles of particulate matter in engine exhaust
An apparatus for real-time measurement of mass, size and number of solid particles of particulate matter in engine exhaust has a catalytic stripper to remove at least about 90% of a volatile...
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6756904 |
Device for purifying exhaust gas of engines
The permeability of a DPF 21 mounted on a diesel engine 1 is evaluated by calculating the apparent passage area (A) based upon a difference in the pressure between the upstream and the...
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6694728 |
Exhaust gas dilution apparatus
An exhaust gas dilution apparatus 10 - 2 is the same form multi-venturi type comprising a rectifier 11, divider 12, exhaust chamber 14, dilution tunnel 15, and a divider pipes 13 t on...
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6622548 |
Methods and apparatus for estimating gas temperatures within a vehicle engine
Method and apparatus are provided for estimating gas temperatures of a vehicle engine. The method comprises receiving a velocity of the vehicle and an air mass flow rate and estimating an exhaust...
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6619107 |
Simple method of measuring nitrogen oxide in running vehicles
The present invention provides a simple method of measuring NO x in a running vehicle. While running on an actual road surface, the weight of NO x emitted from an engine of the running vehicle...
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6615646 |
Carbon dioxide sensor for controlling exhaust gas recirculation in diesel engines
A method of measuring a rate of change of carbon dioxide concentration in recirculated air of an engine, is disclosed. The method includes installing a conductive sample tube into an engine's...
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6609416 |
Diagnostic devices for internal combustion engines and systems for their use
Internal combustion diagnostic sensing devices, systems in which they are used, and methods for their use. The devices operate by detecting pulses created by the exhaust stream of internal...
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6601382 |
Method and apparatus for determining a temperature of an emission catalyst
A control system and method for controlling an engine ( 10 ) of an automotive vehicle having a catalyst ( 34 ) and controller ( 40 ) is set forth herein. The controller ( 40 ) is configured to...
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6553818 |
Exhaust flow calibration apparatus and method
A method and apparatus calibrates an exhaust gas measurement system for a motor vehicle. The method includes the steps of providing a flow of air to the exhaust gas measurement system having a...
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6543227 |
Automated active variable geometry turbocharger diagnosis system
The present invention relates to an engine diagnostic system for detecting malfunctions in an engine system having a variable geometry turbine exhaust system. The engine diagnosis system includes...
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6523340 |
Method and apparatus for diagnosing engine exhaust gas purification system
A diagnosis apparatus for diagnosing a catalytic converter of a motor vehicle as to whether the catalyst suffers deterioration by estimating a temperature of the catalyst or that of the exhaust gas...
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6508242 |
System for estimating engine exhaust temperature
A system is provided for estimating engine exhaust temperature in accordance with an exhaust temperature model based on a number of engine operating parameters. In one embodiment, the engine...
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6487852 |
Method and apparatus for controlling reactant injection into an active lean NOx catalyst
A method and system for determining whether a desired amount of hydrocarbon is actually injected into an engine exhaust to react with NOx in such engine exhaust. The reaction is facilitated with a...
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6470732 |
Real-time exhaust gas modular flowmeter and emissions reporting system for mobile apparatus
A real-time emissions reporting system includes an instrument module adapted to be detachably connected to the exhaust pipe of a combustion engine to provide for flow of exhaust gas therethrough....
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6446498 |
Method for determining a condition of an exhaust gas recirculation (EGR) system for an internal combustion engine
A method for determining a condition of an exhaust gas recirculation (EGR) system for an internal combustion engine. The method includes the steps of setting an EGR valve located on the EGR system...
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6435019 |
Portable on-board system for measuring vehicle exhaust particulate emissions
The invention is directed to an improved mass emissions measuring system ( 15 ) for an internal combustion engine ( 17 ). In the preferred embodiment, the system is comprised of a particulate...
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