Hydrocarbon vapor start techniques using a purge pump and hydrocarbon sensor

• Main Authors: Baker, Edward, Yang, Wei-Jun, Dekar, Joseph, Sager, Roger C, Yannone, Jr., Ronald A, Blomquist, William B, Wakeman, Russell J, Fleischman, Adam, Daley, James J, Tsahalou, Aikaterini, Lott, Mark L, Wuttke, Jeffrey P, Del Rio, Luis, Vincent, Michael T
• Format: Patent
• Language: English
• Published: 02.04.2019
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

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.