Method for a throttle-free load control of an internal combustio

Details Method for a throttle-free load control of an internal combustio Method for a throttle-free load control of an internal combustio

1996-07-22

1998-04-28

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

123 9015, F01L 904, F01L 1300

Patent

active

057432210

ABSTRACT:
A method of operating an internal-combustion engine including a plurality of cylinders; cylinder valves for admitting gases into and removing gases from the cylinders; and actuators connected to the valves for reciprocating the valves between open and closed positions. The method includes the following steps: controlling the actuators of the plurality of cylinders with a first control process as a function of load requirements arising during engine run, as long as the load requirements remain at or above a minimum value; controlling the actuators of at least one first cylinder of the plurality of cylinders with a second control process when the load requirement falls below the minimum value; and simultaneously with controlling the actuators of the first cylinder with the second control process, controlling the actuators of at least one second cylinder of the plurality of cylinders with a third control process. The second and third control processes each may operate in a normal operational mode, a free-flying operational mode or zero-load operational mode or a combination thereof. The operational modes for the second and third control processes are so selected that the second and third control processes are different from one another.

REFERENCES:
patent: 5133310 (1992-07-01), Hitomi et al.
patent: 5606960 (1997-03-01), Takahashi et al.

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