Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1992-07-09
1993-04-06
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
123 9015, F02B 2908
Patent
active
051994038
ABSTRACT:
An air-fuel ratio control system for an internal combustion engine having at least one intake valve with its valve timing changeable at least between low-speed valve timing suitable for engine operation in a low engine rotational speed region, and high-speed valve timing suitable for engine operation in a high engine rotational speed region. When changeover is to be effected from the low-speed valve timing to the high-speed valve timing, an ECU changes the desired air-fuel ratio to be applied when the low-speed valve timing is selected, to one to be applied when the high-speed valve timing is selected, and changes the valve timing to the high-speed valve timing after the desired air-fuel ratio has been changed to the one to be applied when the high-speed valve timing is selected.
REFERENCES:
patent: 4730587 (1988-03-01), Norota et al.
patent: 4926823 (1990-05-01), Kishi et al.
patent: 4938187 (1990-07-01), Seki
patent: 4938188 (1990-07-01), Seki et al.
patent: 5022357 (1991-06-01), Kawamura
Patent Abstracts of Japan, vol. 009, No. 272, Group M425, published Oct. 1985 (abstract of JP60116834).
Akazaki Shusuke
Ikebe Hidehito
Argenbright Tony M.
Honda Giken Kogyo Kabushiki Kaisha
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