Fuel tuned variable valve timing

Details Fuel tuned variable valve timing Fuel tuned variable valve timing

2008-07-24

2010-02-09

Solis, Erick (Department: 3747)

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

C123S00100A, C123S575000, C123S315000

Reexamination Certificate

active

07658171

ABSTRACT:
A system and method for fuel tuned variable valve timing is disclosed. The system includes a plurality of cylinders, each cylinder being further associated with at least two exhaust valves. A first exhaust valve operates according to a first valve lift curve that is tuned for combustion of gasoline. A second exhaust valve operates according to at least two different valve lift curves that are tuned for E85 fuel. The second lift curve is associated with high engine speeds and the modified second lift curve is associated with low engine speeds.

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