| 摘要 |
An ignition system, for an internal combustion engine, having improved ignition performance through attachment of a plurality of spark plugs to each cylinder and featuring less susceptibility of the spark plugs to contamination is disclosed. In a multi-ignition-type internal combustion engine, at least one of a plurality of spark plugs 4 and 5 attached to each of cylinders 2A, 2B, 3B, and 3A is a self-cleaning spark plug A. This configuration prevents contamination, such as soot accumulation, thereby effectively preventing a problem that the internal combustion engine fails to start up. Even when some spark plugs B are contaminated, the self-cleaning spark plug A reliably ignites a fuel-air gas mixture. When the temperature of the engine rises sufficiently high, the contaminated spark plugs B become cleaned; thus, a good condition of ignition can be maintained at all times. <IMAGE> |
