Method for improving the torque band in a multicylinder...

Details Method for improving the torque band in a multicylinder... Method for improving the torque band in a multicylinder...

2006-04-18

2006-04-18

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

Reexamination Certificate

active

07028660

ABSTRACT:
A method for improving the torque band of a multi-cylinder, four-cycle piston internal combustion engine comprising at least two cylinder pairs including variably triggered gas exchange valves, wherein each cylinder pair comprises two cylinders associated with each other by a firing interval of 360° crank angle, and wherein one cylinder pair is not fired by cutting off the fuel supply and acting upon the gas exchange valves resulting in a partial load operation. The method includes triggering the cylinders of the non-fired cylinder pair during the partial load operation so that such cylinders take in a predetermined charge quantity for adjusting a predetermined compression level that influences the torque band. The gas exchange valves of the non-fired cylinders are maintained closed for the duration of the partial-load operation and the associated gas intake valve and/or gas discharge valve is opened only briefly solely to influence the charge quantity during the piston passage through bottom dead center.

REFERENCES:
patent: 4556026 (1985-12-01), Masuda et al.
patent: 4584974 (1986-04-01), Aoyama et al.
patent: 4608952 (1986-09-01), Morita et al.
patent: 5368000 (1994-11-01), Koziara
patent: 5562086 (1996-10-01), Asada et al.
patent: 6332445 (2001-12-01), Voss et al.

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