System and method for estimating fuel vapor with cylinder deactivation
AssigneeFord Global Technologies, LLC
InventorsMichael John Cullen, Gopichandra Sumilla, Christian T. Goralski, Jr.
Life of this patent
Estimating the term…
Abstract
Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, catalyst design, and exhaust system design.
Claims20
A method for estimating a fuel vapor quantity from a fuel vapor recovery system for a vehicle having an engine with a first set of cylinders and a second set of cylinders, the method comprising:
- operating the first set of cylinders with injected fuel and inducted fuel vapors from the fuel vapor recovery system;
- operating the second set of cylinders without fuel vapors from the fuel vapor recovery system;
- mixing exhaust gas from the first and second set;
- and
- determining an indication of fuel vapors from a sensor, said sensor measuring said mixed exhaust gas after said exhaust gasses mix, said determining based on the operation of the second set of cylinders.
A method for estimating a fuel vapor quantity from a fuel vapor recovery system for a vehicle having an engine with a first set of cylinders and a second set of cylinders, the method comprising:
- operating the first set of cylinders with injected fuel and inducted fuel vapors from the fuel vapor recovery system;
- operating the second set of cylinders without fuel vapors from the fuel vapor recovery system;
- mixing exhaust gas from the first and second set;
- and
- determining an estimate of fuel vapors to the first set of cylinders based on fuel injected to said first set of cylinders and a sensor measuring said mixed exhaust gas after said exhaust gasses mix.
A computer readable storage medium having stored data representing instructions executable by a computer for estimating a fuel vapor quantity from a fuel vapor recovery system for a vehicle having an engine with a first set of cylinders and a second set of cylinders, the computer readable storage medium comprising:
- instructions for operating the first set of cylinders with injected fuel and inducted fuel vapors from the fuel vapor recovery system;
- instructions for operating the second set of cylinders without fuel vapors from the fuel vapor recovery system;
- instructions for mixing exhaust gas from the first and second set;
- and
- instructions for determining an indication of fuel vapors from a sensor, said sensor measuring said mixed exhaust gas after said exhaust gasses mix, said determining based on the operation of the second set of cylinders.
Dependencies are inferred from the claim text.