| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073114390 | With vapor vent or purge | 14 |
| 20090293599 | WIND CONDITION BASED VAPOR LEAK DETECTION TEST - A control system comprising a wind condition determination module that determines a wind condition and a leak detection test control module that selectively diagnoses a vapor leak associated with a vehicle based on the wind condition. A method comprising determining a wind condition and selectively diagnosing a vapor leak associated with a vehicle based on the wind condition. | 12-03-2009 |
| 20100101311 | PURGE GAS CONCENTRATION ESTIMATION APPARATUS - A purge gas concentration estimation apparatus has a canister having a casing that is filled with adsorbent which adsorbs and desorbs evaporated fuel and a heat capacity detection device that is disposed in the casing. The heat capacity detection device detects a heat capacity of an inside of the casing. An adsorption amount of the evaporated fuel that is adsorbed in the casing is detected from the heat capacity of the inside of the casing detected by the heat capacity detection device, and a purge gas concentration is estimated from the detected adsorption amount of the evaporated fuel. | 04-29-2010 |
| 20100162804 | Method for Checking the Function of a Tank Venting Valve - The invention relates to a method for checking the function of a tank venting valve between the intake manifold of an internal combustion engine and a fuel tank or a fuel vapor reservoir in which the tank venting valve in operation of the internal combustion engine is opened several times and is closed again after a short opening time and in which during repeated opening and closing the time characteristic of a quantity which is dependent on the opening state of the tank venting valve is recorded. In order to enable a reliable function check of the tank venting valve even in the case of very small and/or time-shifted amplitudes of the quantity to be monitored, it is proposed, according to the invention, that the first derivative of the time characteristic of the quantity be evaluated. | 07-01-2010 |
| 20100223984 | FUEL VAPOR PURGING DIAGNOSTICS - Systems and methods are provided for monitoring reverse flow of fuel vapors and/or air through a vehicle fuel vapor recovery system, said fuel vapor recovery system coupled to an engine intake of a boosted internal combustion engine. One example method comprises, intermittently adjusting a restriction in the fuel vapor recovery system during boosted conditions, and indicating degradation based on one or more of a change in a pressure value, or based on a change in flow in the fuel vapor recovery system. | 09-09-2010 |
| 20120192633 | INTER-CYLINDER AIR-FUEL RATIO IMBALANCE ABNORMALITY DETECTION DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE AND ABNORMALITY DETECTION METHOD THEREFOR - The invention provides an inter-cylinder air-fuel ratio imbalance abnormality detection device for a multi-cylinder internal combustion engine, in which when abnormality detection processing of detecting an inter-cylinder air-fuel ratio imbalance abnormality on the basis of revolution speed fluctuations of the multi-cylinder internal combustion engine and ignition timing control for controlling the ignition timing so as to restrict revolution speed fluctuations in the multi-cylinder internal combustion engine are implemented, the implementation of the ignition timing control is restricted when the abnormality detection processing is implemented, and an abnormality detection method to be used in such a device. | 08-02-2012 |
| 20130000395 | METHOD AND DEVICE FOR DETECTING THE BLOCKAGE OF A GASOLINE VAPOR FILTER PURGE VALVE - A method for detecting the blockage of a gasoline vapor filter ( | 01-03-2013 |
| 20130036807 | METHOD AND DEVICE FOR DETECTING THE PINCHING OF A COUPLING HOSE BETWEEN A TANK AND A GASOLINE VAPOR FILTER - A method for detecting the pinching of a coupling hose between a tank and a gasoline vapor filter for a vehicle internal combustion engine, the vapor filter ( | 02-14-2013 |
| 20130074589 | FUEL VAPOR PURGING DIAGNOSTICS - Systems and methods are provided for monitoring reverse flow of fuel vapors and/or air through a vehicle fuel vapor recovery system, the fuel vapor recovery system coupled to an engine intake of a boosted internal combustion engine. One example method comprises, intermittently adjusting a restriction in the fuel vapor recovery system during boosted conditions, and indicating degradation based on one or more of a change in a pressure value, or based on a change in flow in the fuel vapor recovery system. | 03-28-2013 |
| 20130283896 | SENSING DEVICE FOR CANISTERS - Sensing device for canister has canister sensor | 10-31-2013 |
| 20150052986 | Method for diagnosing a tank venting valve - A method for diagnosing a tank venting valve. This includes measuring a first pressure p | 02-26-2015 |
| 20150121999 | REFUELING DETECTION METHOD - Embodiments for detecting fuel events are presented. In an embodiment, a method comprises performing an action responsive to a fuel event indicated based on output from a hydrocarbon sensor positioned between a fuel tank and a fuel vapor canister. In this way, the hydrocarbon sensor may be used to detect fuel events and engine operation may be adjusted accordingly. | 05-07-2015 |
| 20150361929 | ABNORMALITY DIAGNOSIS DEVICE FOR EVAPORATED-GAS PURGING SYSTEM - An abnormality diagnosis device introduces a pressure into a reference-pressure detecting portion by utilizing a pressure introducing portion to detect a reference pressure correlative to a reference orifice, detects a purge-valve closed pressure that is a pressure in an evaporation system of when a pressure is introduced into the evaporation system by the pressure introducing portion after the purge valve is controlled to be closed, and detects a purge-valve open pressure that is a pressure in the evaporation system of when a pressure is introduced into the evaporation system by the pressure introducing portion after the purge valve is controlled to be open. The abnormality diagnosis device determines whether a leakage abnormality of the evaporation system and a fixed open abnormality are generated, based on a magnitude relation between the reference pressure, the purge-valve closed pressure, and the purge-valve open pressure. | 12-17-2015 |
| 20190145355 | System and Method for Determining a Fuel Vapor Concentration in a Canister of a Vehicle Evaporative Emissions System and for Evaluating the Canister based on the Fuel Vapor Concentration | 05-16-2019 |
| 20190145857 | BLOCKAGE DETECTION DEVICE AND BLOCKAGE DETECTION METHOD | 05-16-2019 |
