Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1988-07-29
1990-08-07
Wolfe, Willis R.
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
123 64, 123179H, 123568, F01L 904, F02B 7502, F02M 2506, F02N 1708
Patent
active
049458701
ABSTRACT:
A method of and apparatus for starting and accelerating a vehicle through a range of vehicle speeds during which the vehicle's internal combustion engine is operated in a plurality of different operating modes is disclosed. The engine may first be cranked in a compressionless mode preparatory to starting and then run in a second mode at a relatively low speed for a warm-up interval as a six-stroke cycle engine where each engine cylinder cycle includes an essentially adiabatic compression and expansion. The system may then convert to a third mode of operation as a four-stroke cycle engine during normal engine operation. Different operating modes are available during this normal engine operation. Under high demand conditions, the engine may be run as a conventional inefficient but effective throttled engine or converted to operate in a fourth mode as a two-stroke cycle engine. The system responds to second engine conditions to modify the parameters in a memory table and controls the vehicle in accordance with the parameters stored in the table. Both short term modification to accommodate dynamic changes in the sensed engine conditions and long term modification to compensate for relatively slow changes in the engine and the management system are made to the information in a random access memory. The modifications may be on an overall engine basis or an individual cylinder basis.
REFERENCES:
patent: 4392459 (1983-07-01), Chareire
patent: 4593658 (1986-06-01), Moloney
patent: 4614170 (1986-09-01), Pischinger et al.
patent: 4641613 (1987-02-01), Delesalle
patent: 4700684 (1987-10-01), Pischinger et al.
Briody Thomas A.
Magnavox Government and Industrial Electronics Company
Rickert Roger M.
Seeger Richard T.
Wolfe Willis R.
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