Patent ID: 6681575
Filing Date: 2004-01-27
Classification: F02B,Y02T

Abstract:
A turbocompound internal combustion engine comprising:a drive shaft; a turbocharger comprising: a turbine and a compressor; an auxiliary turbine located along the path of the exhaust gas, downstream from said turbine of said turbocharger; and transmission means between said auxiliary turbine and said drive shaft said engine further comprising: a first angular speed sensor for detecting the rotation speed of said auxiliary turbine; and a control device for controlling the rotation speed of said auxiliary turbine, and which is connected to said first angular speed sensor and in turn comprises: calculating means for calculating a range of permissible values of said rotation speed of said auxiliary turbine, comparing means for comparing the rotation speed of said auxiliary turbine measured by said first sensor with said range of permissible values, and control means for controlling operating parameters of the engine in response to an enabling signal generated by said comparing means, so as to maintain said speed of said auxiliary turbine within said range of permissible values; said calculating means for calculating said range of permissible values including a second angular speed sensor for detecting the rotation speed of the drive shaft: and processing means for calculating at least a maximum value of the speed of said auxiliary turbine on the basis of the speed of the drive shaft.