Abstract: The present invention relates to a combustion control device incorporated in an apparatus such as water heater and provides the combustion control device having an improved configuration with a main controller and a sub controller, capable of employing a microcomputer with lower capability as the sub controller, and ensuring higher safety than ever before. Signals indicating a combustion state of a combustion apparatus are inputted into the main controller 35 and the sub controller 36 in parallel. Upon fulfillment of a predetermined condition of stopping, the main and sub controllers 35 and 36 each output a stop signal to cut off a current to be supplied to a device driving circuit 42. The conditions of stopping in outputting of the stop signal by the main and sub controllers are such that the sub controller 36 is less apt to execute the cutoff than the main controller 35.

Abstract: The present invention relates to a combustion control device incorporated in an apparatus such as water heater and provides the combustion control device having an improved configuration with a main controller and a sub controller, capable of employing a microcomputer with lower capability as the sub controller, and ensuring higher safety than ever before. Signals indicating a combustion state of a combustion apparatus are inputted into the main controller 35 and the sub controller 36 in parallel. Upon fulfillment of a predetermined condition of stopping, the main and sub controllers 35 and 36 each output a stop signal to cut off a current to be supplied to a device driving circuit 42. The conditions of stopping in outputting of the stop signal by the main and sub controllers are such that the sub controller 36 is less apt to execute the cutoff than the main controller 35.

Abstract: The rotation of a first flywheel of a two-mass type of flywheel device is transmitted to a second flywheel via springs. Frictional connecting portion having a friction plate is provided between the first flywheel and the springs. A driven plate integral with the second flywheel is provided between the springs and the second flywheel. The friction plate is fitted at one end thereof to a cylindrical portion formed on a diametrically inner side of the first flywheel and is frictionally engaged with the first flywheel. The friction plate is engaged at the other end thereof with the springs. A spring holding plate is disposed to define an oil chamber together with the first flywheel for containing therein the springs, the frictional connecting portion, and the driven plate. The first flywheel and the spring holding plate are formed by pressing metallic plate members and the first flywheel and the spring holding plate are welded together at their peripheries for hermetically sealing the oil chamber.