Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1994-04-14
1995-05-30
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123 9013, F01L 902
Patent
active
054193010
ABSTRACT:
A variable camless engine valve control system and method of control wherein each of the reciprocating intake and/or exhaust valves (10) is hydraulically controlled and includes a piston (26) subjected to fluid pressure acting on surfaces at both ends of the piston (26), is connected to a source of high pressure fluid (40) in one volume (27) while the volume (25) at the other end is connected to a source of high pressure fluid (40) and a source of low pressure fluid (42), and disconnected from each through action of controlling means such as a computer (74) controlling solenoid valves (64, 68). Optimum intake air and residual gas quantities in each engine cylinder having the aforementioned variable valve control system is assured by controlling electric pulses of variable duration and timing. The pulse timing and duration are calculated based upon values in permanent memory of the computer (74) corresponding to information obtained from sensors and correction values from a correction memory corresponding to feedback from other sensors.
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Ford Motor Company
May Roger L.
Nelli Raymond A.
Wilkinson Donald A.
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