Finnegan, Henderson, Farabow, Garrett & Dunner
Method of and system for controlling ignition timing in internal combustion engine
 A method and a system is disclosed for controlling ignition timing in an internal combustion engine having a throttle valve and an intake air control valve independent of said throttle valve. Ignition timing is controlled in synchronism with the on-off operation of the intake air control valve. A change in the ignition timing is delayed by a predetermined period of time corresponding to a delay time in completing the on-off operation of the intake air control valve so that the optimum ignition timing is obtained at the proper time. 
Toyota Jidosha Kabushiki Kaisha
F Y F
F02P Y02T F02P
inventional additional inventional
Hiroshi Hiroshi
Mizuno Ito