Entries |
Document | Title | Date |
20080202223 | Diagnosis apparatus for secondary air supply apparatus - A secondary air supply system includes a supply passage, a valve, and a detecting unit. Secondary air is supplied to the upstream of a purification apparatus in an exhaust passage of an engine through the supply passage. The valve communicates and blocks the supply passage to be in open and close conditions. The detecting unit detects a detection object of secondary air in the upstream of the valve in the supply passage. A diagnosis apparatus for the secondary air supply system includes a diagnosis unit that obtains a detection result of the detecting unit in each of the open and close conditions of the valve for evaluating an abnormity of the secondary air supply system in accordance with the detection result. The diagnosis apparatus includes a reliability maintaining unit that determines the diagnosis operation of the diagnosis unit to be valid when the detecting operations in the open and close conditions are continuously performed. | 08-28-2008 |
20080223123 | AIR FILTER RESTRICTION MONITORING WITHOUT PRE-THROTTLE PRESSURE SENSORS - A method of monitoring air flow restriction in an air intake of an internal combustion engine includes recording a predetermined number of pre-throttle pressure samples, recording a predetermined number of mass air flow samples, which respectively correspond to the pre-throttle pressure samples and determining a slope based on the pre-throttle pressure samples and the mass air flow samples. Whether an air filter is inducing an air flow over restriction is determined based on the slope. | 09-18-2008 |
20080264153 | Device for Indicating Fuel Filter Clogging in Internal Combustion Engines, Particularly Diesel Engines - A device for indicating clogging of the fuel filter ( | 10-30-2008 |
20090049896 | Method and device for detecting malfunctions of actuators in the air system on internal combustion engines - A method and a device for detecting faulty functioning of actuators in the air system on internal combustion engines, an actuator being operated using at least two control states, one after the other, at least one sensor, whose output signal is a function of the excursion state of the actuator, reading out the output signal of this sensor being undertaken, and an assessment of the function of the controlled actuator being undertaken from the response of this output signal to the change of the control of the actuator, during the control of the actuator, at least the control of those other actuators included in the air system being kept constant as well as additional control signals for operating the internal combustion engine, which have an influence on the output signal of the sensor. | 02-26-2009 |
20090100921 | INTAKE AIR TEMPERATURE SENSOR DIAGNOSTIC - An intake air temperature (IAT) sensor diagnostic module comprises a measured noise module, an expected noise module, an excess noise module, and an IAT fault detection module. The measured noise module measures noise in an IAT signal from an IAT sensor in a vehicle. The expected noise module determines expected noise based upon the IAT signal. The excess noise module determines an excess noise value based upon the measured noise and the expected noise. The IAT fault detection module diagnoses faults in the IAT sensor based upon a comparison of the excess noise value and a first predetermined value. | 04-23-2009 |
20090139317 | Detecting coolant flow reduction for a marine engine system - A system for detecting a reduction in engine coolant flow rate is provided. The system includes a device configured to monitor at least one parameter associated with an engine, and a device configured to measure actual engine air intake manifold temperature. The system further includes a controller configured to determine a theoretical engine air intake manifold temperature based on the at least one monitored parameter, compare the theoretical engine air intake manifold temperature with the actual measured engine air intake manifold temperature, and generate a signal indicative of engine coolant flow rate. | 06-04-2009 |
20090260428 | ABNORMALITY DIAGNOSIS DEVICE OF INTAKE AIR QUALITY SENSOR - While there occurs a steady operation state where an engine operation state (such as intake air quantity) is maintained substantially constant, a high-response intake air quantity sensor (referred to as the sensor, hereafter) is temporarily powered off and is powered on again when a predetermined time elapses after the power-off. An output rising characteristic of the sensor at the time when the sensor is powered on again is sensed and abnormality diagnosis of the sensor is performed based on the sensing value of the output rising characteristic During a power-off period, the engine operation state is controlled using a sensing value (a stored value) of the sensor immediately preceding the power-off. When an abnormality of the sensor is detected, use of the sensor is prohibited and the intake air quantity is estimated based on intake pipe pressure and the like. | 10-22-2009 |
20090320577 | METHOD FOR DETECTING FAULTS IN THE AIR SYSTEM OF INTERNAL COMBUSTION ENGINES - A method for detecting faults in an air system of an internal combustion engine having an intake manifold and an exhaust manifold includes, but is not limited to the steps of measuring an oxygen concentration of the gas flowing in the exhaust manifold, estimating an intake oxygen control value in the intake manifold and estimating an intake oxygen reference value in the intake manifold based on said oxygen concentration of the gas flowing in the exhaust manifold. The method further includes, but is not limited to the steps of calculating an intake deviation value as a difference between the intake oxygen control value and the intake oxygen reference value and verifying if the intake deviation value is greater than a predetermined first threshold. Besides, the method includes, but is not limited to the steps of estimating an exhaust oxygen control value in the exhaust manifold, calculating an exhaust deviation value a difference between the exhaust oxygen control value and the oxygen concentration of the gas flowing in the exhaust manifold and verifying if the exhaust deviation value is greater than a predetermined second threshold. The method further includes, but is not limited to the steps of determining an exhaust oxygen concentration setpoint indicative of the oxygen concentration in the exhaust manifold, calculating a fresh airflow setpoint as a function of said exhaust oxygen concentration setpoint, measuring a fresh air mass flow value and calculating ( | 12-31-2009 |
20100175462 | VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS - Methods and systems are provided for monitoring cylinder valve deactivation in an engine operating with a plurality of cylinder valves. One example method comprises indicating valve degradation based on an indication of manifold pressure over a plurality of immediately successive induction events of the engine, said indication responsive to increases and decreases in the indication of manifold pressure correlated to the induction events of engine cylinders and further correlated to whether cylinders are commanded to be activated or deactivated. | 07-15-2010 |
20100180675 | HOT FILM AIR MASS METER AND METHOD FOR ITS MANUFACTURE - A device for determining at least one parameter of a fluid medium, in particular an intake air mass of an internal combustion engine. The device comprises a sensor chip for measuring the parameter and a control and evaluation electronics having a circuit carrier. The sensor chip is situated on a chip carrier capable of being introduced into the fluid medium. The chip carrier comprises a projection of the circuit carrier developed in one piece with circuit carrier, the sensor chip | 07-22-2010 |
20110016957 | METHOD AND SYSTEM FOR MONITORING PROPER CONNECTION BETWEEN A VALVE/SEPARATOR AND AN INTAKE SYSTEM WITHIN A CCV SYSTEM - A method and system for monitoring proper connection between a valve/separator and an intake system through a crankcase ventilation system. A dielectric hose has an electrically hose conductive connector mechanically connectable to either: (a) an electrically conductive valve/separator connector, or (b) an electrically conductive intake system connector. An electrical circuit detects electrical continuity through the hose connector and the one of the valve/separator connector or the intake system connector mechanically connectable to said hose connector. | 01-27-2011 |
20110094297 | METHOD FOR DETERMINING AIR FILTER CONDITION - A sensor that is designed for determining ambient pressure for purposes of derating an internal combustion engine at high altitudes, is used to determine the condition of the air filter by taking pressure measurements in the intake manifold before and after the engine is started, with the difference then being an indication of the condition of the air filter. | 04-28-2011 |
20110146394 | VEHICULAR ABNORMALITY DIAGNOSING APPARATUS - A vehicular abnormality diagnosing apparatus that diagnoses an abnormality regarding a connection state of a pair of members that are mounted in a vehicle and connected together, includes a detecting portion that outputs, as an output signal, a first detection signal when the pair of members are in a normal connected state, and a second detection signal when the pair of members are in a state other than the normal connected state; a counting portion that counts at least one of the number of times that the output signal changes from the first detection signal to the second detection signal and the number of times that the output signal changes from the second detection signal to the first detection signal, as an output signal fluctuation count; and a determining portion that determines that there is an abnormality in the connection state when an abnormality determining condition including a condition that the output signal fluctuation count during a predetermined period be equal to or greater than a predetermined count is satisfied. | 06-23-2011 |
20110252875 | METHOD AND DEVICE FOR CHECKING THE ADJUSTMENT OF A PLURALITY OF ACTUATORS DRIVEN BY A COMMON DRIVE IN DIFFERENT MASS FLOW CHANNELS - In a method and a device for checking the adjustment of a plurality of actuators driven by a common drive in different mass flow channels of an internal combustion engine, the actuators are adjusted between a first limit stop and a second limit stop in the particular mass flow channel. The actuators are brought by their common drive to the first limit stop. A first value of a variable that is characteristic of a position of the common drive of the actuators is determined when the first limit stop is reached. The actuators are brought by their common drive to the second limit stop. A second value of the variable that is characteristic of the position of the common drive of the actuators is ascertained upon reaching the second limit stop. A difference is determined between the first value and the second value. The difference is compared in terms of absolute value to at least one predefined threshold value. An error in the adjustment of the actuators in the various mass flow channels is recognized when the absolute value of the difference deviates unacceptably from at least one predefined threshold value. | 10-20-2011 |
20110302999 | DEVICE AND METHOD FOR CYLINDER-TORQUE EQUALIZATION OF AN INTERNAL COMBUSTION ENGINE, COMPUTER PROGRAM, COMPUTER PROGRAM PRODUCT - A device, a method, a computer program and a computer program product for diagnosing an internal combustion engine ( | 12-15-2011 |
20110308308 | Engine Air Filter Replacement Indication System - Disclosed are methods and systems for monitoring and indicating the optimal replacement interval for a filter. In particular, the methods and systems may be utilized for monitoring and indicating the optimal replacement interval of an air filter in an internal combustion engine based on parameters that include air filter plugging rate data, engine duty cycle data, pressure drop across the air filter, penalty on fuel consumption, and the cost of air filter replacement. | 12-22-2011 |
20120006107 | DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE - An association unit is designed to determine cylinder-individual lambda signals on the basis of a lambda probe signal and to determine lambda deviation signals for the respective cylinders based on the lambda signals in relation to an averaged lambda signal. Furthermore, an observer has a sensor model of the lambda probe that is arranged in a feedback branch. The lambda deviation signals are fed to the input side and observer output quantities in relation to the respective cylinder are representative of the injection characteristics deviations from predetermined injection characteristics. A parameter detection unit impresses a predetermined interference pattern from cylinder-individual mixture deviations. It further changes at least one sensor model parameter as a detection parameter in response to the respectively predetermined interference pattern for as long as the observer output quantities represent the portion of the interference pattern associated with the cylinders thereof in a predetermined manner. | 01-12-2012 |
20120192632 | Intake Air Temperature Sensor and Thermal Airflow Meter Including the Same - An intake air temperature sensor capable of detecting an intake air temperature highly accurately and at high speed. The intake air temperature sensor of the present invention includes: a secondary passage | 08-02-2012 |
20120297866 | APPARATUS AND METHOD FOR DETECTING ABNORMAL AIR-FUEL RATIO VARIATION - An apparatus for detecting an abnormal air-fuel ratio variation, includes an abnormality detecting unit that detects an abnormal variation in each of a plurality of fuel injection valves on the basis of an injection ratio between the plurality of fuel injection valves, a fluctuation in the output before the injection ratio is changed and the fluctuation in the output after the injection ratio is changed; and a setting unit that corrects the abnormality determination threshold for each of the plurality of fuel injection valves on the basis of the injection ratio. | 11-29-2012 |
20130036804 | END-OF-LIFE ESTIMATION DEVICE FOR AIR CLEANER - An end-of-life estimation device for an air cleaner, which is capable of always accurately estimating an end of a service life of the air cleaner with an inexpensive construction, thereby enabling the air cleaner to be efficiently used until the service life comes close to the end. The end-of-life estimation device calculates a life parameter indicative of remaining service life of the air cleaner during running of an engine, on an as needed basis, and stores a relationship between the degree of clogging of the air cleaner, an intake air amount, and an intake parameter (an intake pressure on a downstream side of the air cleaner and/or a throttle valve opening). Further, the end-of-life estimation device calculates and updates a reference value with reference to which the life parameter is calculated, based on the stored relationship, according to the detected intake air amount and intake parameter. | 02-14-2013 |
20130036805 | FAILURE DETECTION APPARATUS AND FAILURE DETECTION METHOD FOR A PARTICULATE FILTER - The present invention is intended to provide a technique which is capable of improving detection accuracy at the time of performing failure detection of a particulate filter by the use of a PM sensor. In the present invention, the PM sensor is arranged in an exhaust passage at the downstream side of the particulate filter. Then, the presence or absence of a failure in the particulate filter is determined by making a comparison between an output value of the PM sensor at the time when a predetermined period of time has elapsed after the execution of PM removal processing to remove the particulate matter deposited on the PM sensor is completed, and a predetermined threshold value. At this time, the threshold value is set based on an average value of an amount of intake air in an internal combustion engine during the passage of the predetermined period of time. | 02-14-2013 |
20140174165 | INTAKE GAS SENSOR FOR INTERNAL COMBUSTION ENGINE - A gas sensor includes a gas sensing element positioned at least partially within a body and being exposed at a first end to measure a gas in contact with the first end. A sleeve is fixed to the body and extends from the body in a direction opposite the first end of the gas sensing element. The sleeve includes it remote end portion having an engagement feature. A connector housing is overmolded onto the end portion of the sleeve to lock onto the sleeve via the engagement feature. The connector housing includes a plug connector portion partially enclosing a plurality of electrical terminals electrically connected to the gas sensing element. | 06-26-2014 |
20140216146 | AIR PHYSICAL QUANTITY SENSING DEVICE - To prevent dew condensation on a sensor element, an air physical quantity sensing device which has a housing structural component integrally provided with a connector and a connector terminal member that perform input and output with the outside, an electronic circuit board mounted on the housing structural component, and an air physical quantity sensing element provided on the electronic circuit board and capable of detecting physical quantity of air. The housing structural component formed with a communication hole which allows the inside and outside of the main air flow passage to communicate with each other. The electronic circuit board has the communication hole separated into two and the surface on the side where the air physical quantity sensing element is provided faces the main air flow passage side. | 08-07-2014 |
20150292905 | ASSEMBLY STRUCTURE FOR NON-MAGNETIC BODY - An assembly structure of a nonmagnetic member to which a position sensor arranged to to sense a rotation position of the rotation member, includes: a nonmagnetic member including a hollow portion; a cover which is fixed to an opening end portion of the hollow portion; and a retaining portion which is provided on an outer circumference portion of the hollow portion of the nonmagnetic member, and to which the position sensor is assembled from the opening end portion's side to be slid in a rotation axis direction, the cover restricting movements of the magnet holding portion and the position sensor in the rotation axis direction in a case where the cover is fixed to the nonmagnetic member in a state where the magnet holding portion and the position sensor are assembled to the nonmagnetic member. | 10-15-2015 |
20160202144 | SENSOR | 07-14-2016 |