Patent Number: 6,966,280

Title: Compression pulse starting of a free piston internal combustion engine having multiple cylinders

Abstract: A method for starting a free piston internal combustion engine that includes a first pair of mutually connected pistons, a second pair of mutually connected pistons, a first piston of each pair located in a first cylinder, a second piston of each pair located in a second cylinder. An air charge is supplied to a closed space in the cylinders, and the pistons are reciprocated to increase pressure of an air charge cyclically during successive cycles and to produce a predetermined pressure magnitude. Air and fuel are cyclically admitted to the first cylinder to produce repetitively a fuel-air mixture in the first cylinder. Cyclic combustion of the mixture in the first cylinder is produced, but a delay in applying to the engine at least a portion of an external load occurs until cyclic combustion of an air-fuel the mixture in the second cylinder occurs.

Inventors: Carlson; Cliff (Fenton, MI)

Assignee: Ford Global Technologies, LLC

International Classification: F02N 9/04 (20060101); F02N 9/00 (20060101); F02B 71/02 (20060101); F02B 71/00 (20060101); F02N 009/04 ()

Expiration Date: 1/22/02018