F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 41/14 (2006.01) F02D 41/00 (2006.01) F02M 25/08 (2006.01) G05B 13/02 (2006.01)
Patent
CA 2052774
- 23 - ABSTRACT OF THE DISCLOSURE A system and method for controlling operation of an engine wherein a fuel vapor recovery system is coupled between an air/fuel intake and a fuel supply system. An air/fuel ratio indication is provided by a proportional plus integral feedback controller coupled to a two-state exhaust gas oxygen sensor. In response to the air/fuel ratio indication and a measurement of inducted air flow, a base fuel command is generated. To compensate for purging of fuel vapors, a reference air/fuel ratio is subtracted from the air/fuel ratio indication and the resulting error signal generated. This compensation factor represents a learned value which is directly related to fuel vapor concentration, and it is subtracted from the base fuel command to correct for induction of fuel vapors.
Davenport Martin Frederick
Hamburg Douglas Ray
Ford Motor Company Of Canada Limited
Sim & Mcburney
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