Engine air and fuel control
First Claim
Patent Images
1. A method for controlling an engine, the engine having a first group of cylinders and a second group of cylinders, each coupled to an intake manifold, the method comprising:
- providing a base air amount only and a base fuel amount in stoichiometric proportion to the first group of cylinders and to the second group of cylinders;
adding excess fuel in addition to said base fuel amount to the first group of cylinders thereby providing a rich air/fuel ratio in the first group of cylinders; and
adding excess air in addition to said base air amount to the second group of cylinders thereby providing a lean air/fuel ratio in the second group of cylinders.
2 Assignments
0 Petitions
Accused Products
Abstract
A control method for an internal combustion engine has multiple cylinder groups with at least one control device positioned between an intake manifold and a cylinder group. The engine operates the cylinder groups at different air/fuel ratios and uses the control device to balance torque produced by the different cylinder groups. In one aspect of the invention, one cylinder group is operated rich and another cylinder group is operated lean thereby providing heat to an exhaust system located downstream of the engine.
-
Citations
15 Claims
-
1. A method for controlling an engine, the engine having a first group of cylinders and a second group of cylinders, each coupled to an intake manifold, the method comprising:
-
providing a base air amount only and a base fuel amount in stoichiometric proportion to the first group of cylinders and to the second group of cylinders;
adding excess fuel in addition to said base fuel amount to the first group of cylinders thereby providing a rich air/fuel ratio in the first group of cylinders; and
adding excess air in addition to said base air amount to the second group of cylinders thereby providing a lean air/fuel ratio in the second group of cylinders. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method for controlling an engine, the engine having a first group of cylinders and a second group of cylinders, the engine coupled to an intake manifold, the engine further having an outlet control device for controlling flow exiting the manifold and entering the first group of cylinders, comprising:
-
providing a base air amount only and a base fuel amount in stoichiometric proportion to the first group of cylinders and to the second group of cylinders;
adding excess fuel in addition to said base fuel amount to the first group of cylinders thereby providing a rich air/fuel ratio in the first group of cylinders; and
adding excess air in addition to said base air amount to the second group of cylinders by adjusting the outlet control device thereby providing a lean air/fuel ratio in the second group of cylinders. - View Dependent Claims (15)
-
Specification