Intake and exhaust passages in cylinder heads of an opposed-cyli

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine

Internal combustion engine for portable machine

Internal combustion engine having opposed pistons

Internal combustion engine using opposed pistons

Internal combustion engine with arrangement for adjusting...

Internal combustion engine with central chamber

Internal combustion engine with compound piston assembly

Internal combustion engine with drive shaft propelled by...

Internal combustion engine with improved gas exchange

Internal combustion engine with novel fuel/air delivery system