| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123521000 | Responsive to secondary air pressure | 26 |
| 20120174897 | BIDIRECTIONAL ADSORBENT-CANISTER PURGING - A method for combusting a vapor of a fuel accumulated in an adsorbent canister in a vehicle, the vehicle having an engine and a fuel tank coupled to the adsorbent canister. The method comprises, during a first operating condition including a higher availability of compressed air, metering the compressed air from a first air source, and flowing the metered, compressed air through the adsorbent canister along a first flow path. The method further comprises, during a second operating condition including a lower availability of compressed air, flowing air from a second air source through the adsorbent canister, and, during the first and second operating conditions, venting the fuel tank to an intake of the engine and flowing effluent enriched in the vapor from the adsorbent canister to the intake of the engine. | 07-12-2012 |
| 20130037007 | FUEL STORAGE SYSTEM FOR A VEHICLE - An evaporative emission control system for a fuel tank of a vehicle includes a diurnal control module coupled to a vapor exhaust line running between the fuel tank and an activated carbon canister. A purge line is coupled to the canister and is open to atmospheric pressure. The purge line includes a breathing loss accumulator that collects fuel vapors expelled from the canister during diurnal thermal expansion. The diurnal control module closes fluid communication between the fuel tank and the canister when the fuel tank is not being refueled to maintain the fuel tank in a pressurized condition and the canister in a non-pressurized condition. | 02-14-2013 |
| 20130112176 | METHOD AND SYSTEM FOR FUEL VAPOR CONTROL - Methods and systems are provided for generating sufficient vacuum to enable a leak detection routine. While a fuel tank pressure is within mechanical limits, fuel vapors are purged from a canister to an engine with an isolation valve open to generate a desired level of vacuum in the fuel tank. Thereafter, the fuel tank is isolated and leak detection is performed concurrent to the purging. | 05-09-2013 |
| 20120234302 | EVAPORATIVE FUEL TREATMENT APPARATUS OF VEHICLE - An evaporative fuel treatment apparatus for a vehicle is provided with a reverse flow preventing valve provided in a fuel supply pipe, a positioning plate provided on the fuel supply pipe, a pressing plate mounted slidably on the fuel supply pipe between the positioning plate the reverse flow preventing valve, a seal member clamped between the positioning plate and the pressing plate, and a stopper. When the fuel supply is started, the reverse flow preventing valve is configured to be set opened so as to form a liquid trap between the reverse flow preventing valve and the pressing plate. When the liquid surface reaches the pressing plate, the fuel pushes the pressing plate upward and the seal member is collapsed in the vertical direction so that the seal member protrudes toward the fuel supply gun insertion holes and makes tight contact with the fuel supply gun to seal a gap. | 09-20-2012 |
| 20110197862 | Checking Functionality of Fuel Tank Vapor Pressure Sensor - A vehicle fuel emissions system includes a fuel tank, a tank pressure sensor indicating a pressure differential between the tank and a port communicating with the atmosphere, a pump for selectively producing vacuum in the tank, and a passage connecting the pump and a pressure sensor air reference port external to the system. | 08-18-2011 |
| 20090283075 | INTERNAL COMBUSTION ENGINE APPARATUS, VEHICLE INCLUDING INTERNAL COMBUSTION ENGINE APPARATUS, AND CONTROL METHOD OF INTERNAL COMBUSTION ENGINE APPARATUS - In performing purge control, an engine ECU | 11-19-2009 |
| 20110168140 | METHOD AND SYSTEM FOR FUEL VAPOR CONTROL - A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system. | 07-14-2011 |
| 20090288646 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - An internal combustion engine control apparatus includes: a purge control unit causing fuel evaporative emission to be introduced into an intake passage to attain a purge flow rate based on a pressure in the intake passage; a fuel cut return rich control unit setting a rich target air-fuel ratio when returning from fuel cut, and feedback-controlling a fuel supply rate on the basis of the target air-fuel ratio, purge flow rate and intake air flow rate to attain the target air-fuel ratio; a fuel increase upper limit setting unit setting an allowable upper limit for an increase in fuel supply rate in fuel cut return rich control; and an actual air-fuel ratio control unit controlling an actual air-fuel ratio to a richer side when the fuel supply rate in the fuel cut return rich control has reached the allowable upper limit and the actual air-fuel ratio is lean. | 11-26-2009 |
| 20100288242 | FUEL VAPOR PROCESSING APPARATUS - A fuel vapor processing apparatus includes a purge air supply device including separation device that can separate gas, which is introduced from within a fuel tank, into a fuel component and an air component. The air component is supplied into a canister for purging the canister. | 11-18-2010 |
| 20100147270 | CRANKCASE BREECH DETECTION FOR BOOSTED ENGINES - Methods for indicating whether a crankcase of an engine is breeched are provided. One example method comprises restricting a communication of the crankcase with atmosphere, acting to increase or decrease a crankcase pressure, and indicating whether the crankcase is breeched based on the crankcase pressure. Another example method comprises sensing a crankcase pressure component, and indicating whether the crankcase is breeched based on the crankcase pressure component, the crankcase communicating with atmosphere via a conduit, a restrictedness of the conduit responsive to one or more of a crankcase pressure and a signal from an electronic control unit of the motor vehicle. Still other examples provide more particular methods for indicating whether the crankcase is breeched, and example configurations that enable the various methods. | 06-17-2010 |
| 20100263636 | SYSTEM AND METHOD FOR IMPROVING FUEL VAPOR PURGING FOR AN ENGINE HAVING A COMPRESSOR - A system and method for storing and purging fuel vapors for an internal combustion engine comprising a compressor is presented. The system allows the canister to be purged even while the engine is operated at high engine load. | 10-21-2010 |
| 20090078239 | Method For Recovering Vapor During An Onboard Refueling Operation - A method for recovering vapor during an onboard refueling operation comprising the steps of:
| 03-26-2009 |
| 20100199954 | VAPORIZED-FUEL PROCESSING DEVICE FOR AN ENGINE - The present invention has an object to provide a vaporized-fuel processing device for an engine, capable of stabilizing the idling operation. | 08-12-2010 |
| 20120240906 | EVAPORATED FUEL TREATMENT DEVICE FOR VEHICLE - An evaporated fuel treatment device is provided to treat evaporated fuel by using a fuel supply cap with a small size while the flowout of fuel can also be suitably prevented. The evaporated fuel treatment device includes a positive pressure adjusting valve which opens when an inner pressure of a fuel tank becomes a predetermined pressure or more, and a spherical rollover valve which closes the positive pressure adjusting valve when the fuel tank is inclined at an angle equal to or larger than a predetermined angle. The positive pressure adjusting valve and the spherical rollover valve are mounted on one cylindrical portion formed on a fuel supply cap. | 09-27-2012 |
| 20110030658 | POSITIVE-PRESSURE CRANKCASE VENTILATION - A method for combusting a vapor of a fuel accumulated in a crankcase of an engine, the engine disposed in a vehicle having a fuel tank and an adsorbent canister coupled to the fuel tank. The method comprises flowing compressed air from a first air source through the crankcase to yield a crankcase effluent enriched in gasses leaked from the combustion chamber, which include the fuel vapor. The method further comprises combining the crankcase effluent with an effluent from the adsorbent canister, also enriched in the vapor, and, flowing the combined crankcase and adsorbent-canister effluent to an intake of the engine via a conduit. | 02-10-2011 |
| 20110030659 | BIDIRECTIONAL ADSORBENT-CANISTER PURGING - A method for combusting a vapor of a fuel accumulated in an adsorbent canister in a vehicle, the vehicle having an engine and a fuel tank coupled to the adsorbent canister. The method comprises, during a first operating condition including a higher availability of compressed air, metering the compressed air from a first air source, and flowing the metered, compressed air through the adsorbent canister along a first flow path. The method further comprises, during a second operating condition including a lower availability of compressed air, flowing air from a second air source through the adsorbent canister, and, during the first and second operating conditions, venting the fuel tank to an intake of the engine and flowing effluent enriched in the vapor from the adsorbent canister to the intake of the engine. | 02-10-2011 |
| 20110247595 | FUEL VAPOR PROCESSING APPARATUS - According to the present teaching, a fuel vapor processing apparatus includes a fuel tank, a canister capable of adsorbing fuel vapor produced in the fuel tank, a fuel pump disposed within the fuel tank, a fuel recovery device configured to recover the fuel vapor from the canister into the fuel tank, and a control device configured to stop recovery of the fuel vapor by the fuel recovery device based on at least one of parameters representing the amount of the fuel vapor remaining within the canister. | 10-13-2011 |
| 20110162625 | Method and Apparatus for Evaporative Emissions Control - A method of controlling an evaporative emissions system of a vehicle includes determining that a refueling event has been requested by a vehicle occupant, detecting a pressure inside a fuel tank, and impeding opening of a fuel tank inlet if the pressure is above a limit value. After the refueling event, an open/closed status of a fuel inlet access door is monitored, a fuel level inside a fuel tank is monitored, and a vehicle engine an operating condition is monitored. Pressure buildup within the fuel tank is disabled if a) the open/closed status has not changed from closed to open, and b) the fuel level has increased, and c) the vehicle engine is operating. An operator alert may be generated, and/or a fault code may be set in a vehicle diagnostic system. | 07-07-2011 |
| 20110186020 | LEAKAGE DIAGNOSTIC DEVICES FOR FUEL VAPOR PROCESSING APPARATUS - A leakage diagnosis device can determine whether or not leakage occurs from a fuel vapor processing apparatus by comparing a diagnosis criterion, such as a reference pressure set for diagnosing leakage, with an internal pressure of a process system of the fuel vapor processing apparatus during application of a negative or positive pressure to the process system. The diagnosis criterion has a device that can correct the diagnosis criterion based on a fuel vapor pressure within the process system. | 08-04-2011 |
| 20110315127 | LOW PURGE FLOW VEHICLE DIAGNOSTIC TOOL - A vehicle includes an engine, a sealed fuel system having a fuel tank, a canister for storing fuel vapor, a vapor circuit external to the fuel tank, and a control valve. The vapor circuit includes an absolute pressure sensor and a switching valve connecting the fuel tank to the control valve. A controller evaluates or diagnoses a vapor purge function of the sealed fuel system using vacuum measurements from the absolute pressure sensor, executing or diagnosing only when the engine is running, purge is enabled, and the pump is off. The controller diagnoses the vapor purge function by comparing the vacuum measurements to a threshold vacuum. An apparatus includes the vapor circuit and controller. A method for diagnosing the vapor purge function includes actuating the switching valve, measuring a vacuum in the system using the absolute pressure sensor, and comparing the measured vacuum to a threshold vacuum. | 12-29-2011 |
| 20120055452 | METHOD AND SYSTEM FOR FUEL VAPOR CONTROL - A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system. | 03-08-2012 |
| 20100288241 | FUEL VAPOR PROCESSING APPARATUS - A fuel vapor processing apparatus includes a device that can restrict or prevent flow of gas from a vapor passage into a canister during recovering of fuel vapor from the canister into a fuel tank. | 11-18-2010 |
| 20100050995 | EVAPORATED FUEL TREATING APPARATUS - An evaporated fuel treating apparatus that realizes enhanced exertion of the treating capability of a canister for evaporated fuel and thus efficient treatment of evaporated fuel. Vapor piping for feeding an evaporated fuel from fuel tank to canister is provided with first close valve. The first close valve is capable of regulating the flow rate of transit evaporated fuel through regulation of the opening degree thereof. Accordingly, the evaporated fuel treating capability of the canister can be exerted higher than in the system in which the flow rate of evaporated fuel is not regulated. | 03-04-2010 |
| 20110265768 | Method and System for Fuel Vapor Control - Methods and systems are provided for operating a fuel vapor recovery system having a fuel tank isolation valve coupled between a fuel tank and a canister. Fuel vapors are purged from the fuel tank to a canister buffer over a plurality of purge pulses. The pulses are adjusted based on the buffer capacity, a purge flow rate, and a fuel tank pressure to improve control of canister loading and reduce air-to-fuel ratio disturbances. | 11-03-2011 |
| 20120085325 | FUEL VAPOR RECOVERY SYSTEM - A fuel vapor recovery system has a fuel tank, an adsorbent canister, a separator capable of separating fuel vapor from air, and a negative pressure supplier applying negative pressure to the adsorbent canister in order to remove the fuel vapor from the adsorbent canister. The separator has a housing and a separation membrane. The separation membrane divides an inner space of the housing into a receiving chamber and a permeation chamber and is configured to allow the fuel vapor to pass therethrough. The separator is connected with the fuel tank such that the fuel tank is fluidly connected with the receiving chamber. The negative pressure supplier is fluidly connected with the adsorbent canister via the permeation chamber. When the negative pressure supplier applies negative pressure to the adsorbent canister, purge gas flows from the adsorbent canister into the fuel tank via the permeation chamber. | 04-12-2012 |
| 20120138023 | CANISTER WITH DUAL AIR FLOW PATHS - A canister for a vehicle, and more particularly, a canister with dual air flow paths is configured to divide an inner space of an air entrance of the canister into two spaces and allow air to flow in from an outdoor atmosphere through one space between two spaces in a purging operation and discharge fuel evaporation gas to the outdoor atmosphere through the other space when the fuel evaporation gas is discharged in order to prevent pressure in a fuel tank from being raise | 06-07-2012 |
