초록 ▼

An internal combustion engine including a turbocharger and a controller for the turbocharger. The engine has an air intake to receive a charge of compressed air while the turbocharger includes a compressor connected to the air intake. The turbine is connected to and driven by exhaust gases of the en

An internal combustion engine including a turbocharger and a controller for the turbocharger. The engine has an air intake to receive a charge of compressed air while the turbocharger includes a compressor connected to the air intake. The turbine is connected to and driven by exhaust gases of the engine and drives the compressor. The controller limits the pressure of the compressed air charge to below a predetermined pressure at high engine speed. The engine further includes a positive displacement compressor connected to the inlet of the turbocharger compressor to supply compressed air at low engine speeds, and a direct drive for the positive displacement compressor. The drive is selectively operable and able to be selectively disabled. The engine also includes a second controller for limiting the combined air pressure when both compressors are operated at below the predetermined pressure level and to disable the direct drive and the positive displacement compressor when the turbocharger is supplying a compressed air charge at a desired pressure level.

대표청구항 ▼

The combination comprising: an internal combustion engine having an air intake to receive a charge of compressed air and an exhaust outlet for discharging exhaust gases, a turbocharger having a compressor for compressing air and connected to the air intake to supply a compressed air charge thereto,

The combination comprising: an internal combustion engine having an air intake to receive a charge of compressed air and an exhaust outlet for discharging exhaust gases, a turbocharger having a compressor for compressing air and connected to the air intake to supply a compressed air charge thereto, a turbine in said turbocharger connected to and driven by exhaust gases from the exhaust outlet of the engine and driving the compressor to compress air, means to control the turbocharger to limit the pressure of the compressed air charge to below a predetermined pressure at high engine speeds, a positive displacement compressor having an air inlet and an air outlet with the outlet being connected to the inlet of turbocharger compressor to compress air and to supply compressed air to the inlet of the turbocharger compressor at low engine speeds, direct drive means driven by the engine and selectively operable to drive the positive displacment means and being selectively disabled, and control means for limiting the combined air pressure being supplied when both compressors are operating to below the predetermined pressure level and to effectively disable the direct drive means and the positive displacement compressor from compressing air when the turbocharger is supplying a compressed air charge at a desired pressure level.