Air/fuel ratio control device for internal combustion engine

Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system

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123 9015, F02M 3304

Patent

active

059671254

ABSTRACT:
A control method and system that achieves a desired purge flow rate in accordance with operation of a variable valve timing control mechanism. Although pumping loss of an internal combustion engine is varied by a change in the amount of operating the variable valve timing control mechanism, a change in an intake pressure in an intake passage is caused by influence of inertia supercharging, and the purge flow rate is changed. In this case, an opening degree of a purge solenoid valve is set according to the respective amount of operating the variable valve timing control mechanism. The set opening degree is considered by the ECU, and a final opening degree of the purge solenoid valve is set, so that a desired purge flow rate can be controlled regardless of the operation of the variable valve timing control mechanism.

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patent: 5758308 (1998-05-01), Maki et al.
patent: 5806501 (1998-09-01), Osanai
patent: 5850820 (1998-12-01), Tsutsumi et al.
patent: 5884609 (1999-05-01), Kawamoto et al.

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