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公开(公告)号：US09970391B2
公开(公告)日：2018-05-15
申请号：US15164479
申请日：2016-05-25
申请人： Roger C Sager , William B Blomquist , James Daley , Aikaterini Tsahalou , Ronald A Yannone, Jr. , Luis Del Rio , Mark L Lott , Joseph Dekar
发明人： Roger C Sager , William B Blomquist , James Daley , Aikaterini Tsahalou , Ronald A Yannone, Jr. , Luis Del Rio , Mark L Lott , Joseph Dekar
CPC分类号： F02M25/0827 , F02D41/003 , F02D41/004 , F02D41/042 , F02D41/22 , F02D2041/225 , F02M25/0836 , F02M25/0854
摘要： A diagnostic method and system includes a control valve configured to control an amount of air drawn into an evaporative emissions (EVAP) system through an air filter and a vapor canister, and a pressure sensor configured to measure pressure in the EVAP system. The system also includes a controller configured to detect an engine idle-to-off transition and, in response to detecting the engine idle-to-off transition: receive a first pressure from the pressure sensor, fully open a purge valve connected between the vapor canister and an intake port of an engine, fully close the control valve, monitor one or more second pressures received from the pressure sensor, and detect a malfunction of the EVAP system based on the first pressure, at least one of the one or more second pressures, and a diagnostic threshold.
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公开(公告)号：US20170342946A1
公开(公告)日：2017-11-30
申请号：US15164479
申请日：2016-05-25
申请人： Roger C. Sager , William B. Blomquist , James Daley , Aikaterini Tsahalou , Ronald A. Yannone, JR. , Luis Del Rio , Mark L. Lott , Joseph Dekar
发明人： Roger C. Sager , William B. Blomquist , James Daley , Aikaterini Tsahalou , Ronald A. Yannone, JR. , Luis Del Rio , Mark L. Lott , Joseph Dekar
CPC分类号： F02M25/0827 , F02D41/003 , F02D41/004 , F02D41/042 , F02D41/22 , F02D2041/225 , F02M25/0836 , F02M25/0854
摘要： A diagnostic method and system includes a control valve configured to control an amount of air drawn into an evaporative emissions (EVAP) system through an air filter and a vapor canister, and a pressure sensor configured to measure pressure in the EVAP system. The system also includes a controller configured to detect an engine idle-to-off transition and, in response to detecting the engine idle-to-off transition: receive a first pressure from the pressure sensor, fully open a purge valve connected between the vapor canister and an intake port of an engine, fully close the control valve, monitor one or more second pressures received from the pressure sensor, and detect a malfunction of the EVAP system based on the first pressure, at least one of the one or more second pressures, and a diagnostic threshold.
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公开(公告)号：US09879623B2
公开(公告)日：2018-01-30
申请号：US15164462
申请日：2016-05-25
申请人： Joseph Dekar , Roger C Sager , James J Daley , William B Blomquist , Jeffrey P Wuttke , Russell J Wakeman , Adam Fleischman , Ronald A Yannone, Jr. , Luis Del Rio , Mark L Lott , Edward Baker , Michael T Vincent , Wei-Jun Yang , Aikaterini Tsahalou
发明人： Joseph Dekar , Roger C Sager , James J Daley , William B Blomquist , Jeffrey P Wuttke , Russell J Wakeman , Adam Fleischman , Ronald A Yannone, Jr. , Luis Del Rio , Mark L Lott , Edward Baker , Michael T Vincent , Wei-Jun Yang , Aikaterini Tsahalou
CPC分类号： F02D41/0045 , F02D41/021 , F02D41/064 , F02M25/0818 , F02M25/0827 , F02M25/0836 , F02M25/0854 , F02M25/089 , F02M35/10222
摘要： An evaporative emissions (EVAP) control system for a vehicle includes a purge pump configured to pump fuel vapor trapped in a vapor canister to an engine of the vehicle via a vapor line when engine vacuum is less than an appropriate level for delivering fuel vapor to the engine, the fuel vapor resulting from evaporation of a liquid fuel stored in a fuel tank of the engine. The EVAP control system includes a hydrocarbon (HC) sensor disposed in the vapor line and configured to measure an amount of HC in the fuel vapor pumped by the purge pump to the engine via the vapor line. The EVAP control system also includes a controller configured to, based on the measured amount of MC, control at least one of the purge pump and a purge valve to deliver a desired amount of fuel vapor to the engine.
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公开(公告)号：US20170342919A1
公开(公告)日：2017-11-30
申请号：US15164462
申请日：2016-05-25
申请人： Joseph Dekar , Roger C. Sager , James J. Daley , William B. Blomquist , Jeffrey P. Wuttke , Russell J. Wakeman , Adam Fleischman , Ronald A. Yannone, JR. , Luis Del Rio , Mark L. Lott , Edward Baker , Michael T. Vincent , Wei-Jun Yang , Aikaterini Tsahalou
发明人： Joseph Dekar , Roger C. Sager , James J. Daley , William B. Blomquist , Jeffrey P. Wuttke , Russell J. Wakeman , Adam Fleischman , Ronald A. Yannone, JR. , Luis Del Rio , Mark L. Lott , Edward Baker , Michael T. Vincent , Wei-Jun Yang , Aikaterini Tsahalou
CPC分类号： F02D41/0045 , F02D41/021 , F02D41/064 , F02M25/0818 , F02M25/0827 , F02M25/0836 , F02M25/0854 , F02M25/089 , F02M35/10222
摘要： An evaporative emissions (EVAP) control system for a vehicle includes a purge pump configured to pump fuel vapor trapped in a vapor canister to an engine of the vehicle via a vapor line when engine vacuum is less than an appropriate level for delivering fuel vapor to the engine, the fuel vapor resulting from evaporation of a liquid fuel stored in a fuel tank of the engine. The EVAP control system includes a hydrocarbon (HC) sensor disposed in the vapor line and configured to measure an amount of HC in the fuel vapor pumped by the purge pump to the engine via the vapor line. The EVAP control system also includes a controller configured to, based on the measured amount of HC, control at least one of the purge pump and a purge valve to deliver a desired amount of fuel vapor to the engine.
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公开(公告)号：US20170342917A1
公开(公告)日：2017-11-30
申请号：US15164464
申请日：2016-05-25
申请人： Joseph Dekar , Roger C Sager , James J Daley , William B Blomquist , Jeffrey P Wuttke , Russell J Wakeman , Adam Fleischman , Ronald A Yannone, Jr. , Luis Del Rio , Mark L Lott , Edward Baker , Michael T Vincent , Wei-Jun Yang , Aikaterini Tsahalou
发明人： Joseph Dekar , Roger C Sager , James J Daley , William B Blomquist , Jeffrey P Wuttke , Russell J Wakeman , Adam Fleischman , Ronald A Yannone, Jr. , Luis Del Rio , Mark L Lott , Edward Baker , Michael T Vincent , Wei-Jun Yang , Aikaterini Tsahalou
CPC分类号： F02D41/004 , F02D41/003 , F02D41/0032 , F02D41/0035 , F02D41/0042 , F02D41/0045 , F02D41/062 , F02D41/064 , F02M21/0278 , F02M21/0287 , F02M25/08 , F02M25/0836 , F02M25/0854 , F02N99/008
摘要： An evaporative emissions (EVAP) control system for a vehicle includes a purge pump configured to pump fuel vapor to an engine of the vehicle via a vapor line and a purge valve. The system includes a hydrocarbon (HC) sensor disposed in the vapor line and configured to measure an amount of HC in the fuel vapor pumped by the purge pump to the engine via the vapor line. A controller is configured to: detect an imminent cold start of the engine and, in response to the detecting, perform the cold start of the engine by controlling at least one of the purge pump and the purge valve, based on the measured amount of HC, to deliver a desired amount of fuel vapor to the engine, which decreases HC emissions by the engine.
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