Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1994-12-15
1997-02-04
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
123 9015, 123 9017, F01L 904, F01L 1300
Patent
active
055988148
ABSTRACT:
A motor control includes position transducers for generating crankshaft position and motor position pulse trains. The pulse trains are compared to detect any phase difference between engine and motor. Tables are generated to define the desired phase difference needed for particular valve characteristics. The phase difference represents the instantaneous deviation from the basic profile. One of the tables is selected according to the engine conditions and the motor is driven to achieve the desired phase differences.
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Henry Rassem R.
Lequesne Bruno P. B.
Murty Balarama V.
Schroeder Thaddeus
General Motors Corporation
Lo Weilun
Veenstra Charles K.
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