Patent ID: 7258104
Filing Date: 2007-08-21
Classification: F02B,F02D,Y02T

Abstract:
1. An intake/exhaust system for a dual-mode homogeneous charge compression ignition (HCCI) engine operable in SI and HCCI modes, said system comprising: at least one cylinder including at least one intake valve and at least one exhaust valve; at least one cam profile switching device operatively connected to at least one of said intake and exhaust valves; at least one cold-air duct connected to said cylinder for supplying cold air to said cylinder upon opening of said intake valve and a cold-air throttle; at least one hot-air duct connected to said cylinder for supplying heated air to said cylinder upon opening of said intake valve and hot-air throttle; and at least one check valve connected between said cold and hot-air ducts for permitting flow of air between said ducts.