Patent ID: 8612117

Claim:
An apparatus for controlling an amount of waste heat of an engine based on a requested heat amount of a heat utilization request, the apparatus being applied to a waste heat reuse system that recovers and reuses waste heat of an engine, the apparatus comprising: overlap angle control means for controlling an overlap angle between a valve-opening period of an intake valve and a valve-opening period of an exhaust valve of the engine based on an engine driving condition; ignition timing control means for controlling ignition timing of the engine at maximum-efficient timing when minimum fuel consumption is achieved in each engine driving condition; and waste heat control means for performing overlap-increase control under which the overlap angle is increased and ignition advance control under which the ignition timing is shifted to an ignition advance side with reference to the maximum-efficient timing that corresponds to the overlap angle after being increased, in the case where the requested heat amount cannot be satisfied.