Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1988-09-01
1989-12-12
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
123520, F02D 4134
Patent
active
048860263
ABSTRACT:
A fuel delivery control system for a multiport fuel injected internal combustion engine. A fuel vapor recovery system periodically purges fuel vapors from the fuel system into the intake manifold under control of a purge controller. The intake manifold has a separate runner coupled to each combustion chamber with a separate primary fuel injector coupled thereto. A secondary fuel injector of smaller size is coupled to the intake manifold upstream of the primary fuel injectors. Primary and secondary fuel injectors are controlled, respectively, by a primary fuel injection controller and a secondary fuel injection controller. Both primary and secondary fuel injection controllers are responsive to a desired fuel charge related to a desired air/fuel ratio of a mixture of air, injected fuel, and fuel vapors injected into the engine. The desired fuel charge is generated in response to a measurement of inducted airflow and a feedback indication of actual air/fuel ratio from an exhaust gas oxygen sensor. When the desired fuel charge is below the linear range of the primary fuel injectors, the primary fuel injector controller is disabled and the second fuel injector controller enabled. Conversely, when the desired fuel charge is within the linear range of the primary fuel injectors, the primary fuel injector controller is enabled and the second fuel injection controller is disabled.
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Abolins Peter
Argenbright Tony M.
Ford Motor Company
Lippa Allan J.
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