US 11,719,146 B2
Methods and systems for reducing engine exhaust emissions
Aed Dudar, Canton, MI (US); Keith Weston, Canton, MI (US); and Jim Stevens, Belleville, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Mar. 18, 2021, as Appl. No. 17/205,536.
Prior Publication US 2022/0298946 A1, Sep. 22, 2022
Int. Cl. F01N 3/20 (2006.01); F01N 3/36 (2006.01); F02D 41/02 (2006.01); F02D 41/06 (2006.01); G07C 5/08 (2006.01); B01D 53/02 (2006.01); F02B 39/10 (2006.01)
CPC F01N 3/2033 (2013.01) [B01D 53/02 (2013.01); F01N 3/36 (2013.01); F02B 39/10 (2013.01); F02D 41/024 (2013.01); F02D 41/064 (2013.01); G07C 5/0808 (2013.01); B01D 2253/102 (2013.01); B01D 2257/702 (2013.01); B01D 2259/4516 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for an engine in a vehicle, comprising:
opening a first valve housed in a first air conduit to flow pressurized air from a pump of an evaporative leak check module (ELCM) to an exhaust passage upstream of an exhaust catalyst while the pump is operated in a pressure mode.