Surgical or Nonoperative Treatment for Lumbar Spinal Stenosis

In an internal combustion engine with an exhaust gas turbocharger which supplies compressed charge air to the engine via a charge air duct including an intercooler with a housing and a cooling structure for cooling the compressed charge air before it is supplied to the engine, the intercooler housing has an inlet area connected to the turbocharger by an upstream section of the charge air duct and an outlet area connected to the engine by a downstream section of the charge air duct and an air flow control mechanism which is arranged between the inlet and outlet areas and operable to be open during engine warm-up when the engine is below a predetermined temperature so that the charge air by-passes the cooling structure during engine warm-up.