Method for suppressing pre-ignition occurring before ignition timing in combustion chamber of engine, involves detecting occurrence or increased risk of pre-ignition and injecting water with modified injection characteristic

摘要

The method involves detecting (100) occurrence of pre-ignition or an increased risk of pre-ignition. The water is injected with a modified injection characteristic at predetermined time in response to detection. The water injection quantity is increased after detection process. The nitric oxide formation is reduced by knock suppression. An independent claim is included for an engine control apparatus for internal combustion engine with water injection.