Patent ID: 8642932

Claim:
A system for controlling a TIR (Total Indicated Reading) of a crankshaft for an internal combustion engine having a plurality of centrifugal bearing surfaces, the system comprising: a first bearing hardening station with an induction heating and quench system for hardening at least a first bearing group of bearings of a crankshaft using a first power profile and a first quench flow rate profile, at least one bearing of said first group of bearings located between a plurality of bearings of a second group of bearings, the first bearing hardening station hardens a first group of bearings of the crankshaft using given first power and quench flow rate profiles; a TIR station with at least one probe and a transducer for measuring a crankshaft TIR after processing said first group of bearings in said first bearing hardening station; a second bearing hardening station with an induction heating and quench system for hardening said second group of bearings on said crankshaft using a second power profile and a second quench flow rate profile; a system to determine or measure said crankshaft TIR after processing said first group of bearings in said first bearing hardening station by said first power profile; and a feedback control to adjust said second power profile, said second quench flow rate profile, or combinations thereof based on said determined or measured crankshaft TIR, said second power profile being adjusted prior to said second group of bearings on said crankshaft being hardened in said second bearing hardening station.