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Internal combustion engine and supercharger

  • US 20110083647A1
  • Filed: 08/27/2010
  • Published: 04/14/2011
  • Est. Priority Date: 10/14/2009
  • Status: Active Grant
First Claim
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1. An internal combustion engine and supercharger comprising:

  • an internal combustion engine having an air intake manifold and at least one combustion chamber for receiving air from the intake manifold that can range selectively from below through above atmospheric pressures,a supercharger for supplying air to the air intake manifold of the internal combustion engine selectively that can range selectively from below through above atmospheric pressures,the supercharger includesa housing having a pair of chambers,an air bypass opening open to one of the chambers and a bypass air exit passage,a pair of rotatable rotors located in the chambers operable to move air through the housing to atmosphere and the air intake manifold of the engine that can range selectively from below through above atmospheric pressures,a valve assembly for controlling the mass of air flow at below atmospheric pressure flowing to the air intake manifold to regulate the power of the internal combustion engine,a first actuator operably connected to the valve assembly for operating the valve assembly to vary the power of the internal combustion engine,an air flow control apparatus operable to vary the mass and above atmospheric pressure of the air supplied to the air intake manifold of the internal combustion engine responsive to the power requirements of the internal combustion engine to vary the rate of flow of air from the air intake manifold delivered to the combustion chamber of the internal combustion engine above the atmospheric pressure into the combustion chamber of the internal combustion engine,said air flow apparatus including a slide assembly movably mounted on the housing for movement between maximum air bypass, partial air bypass and minimum air bypass positions relative to the rotors and said air bypass opening whereby a first portion of air moved by the rotors when the slide assembly is in the maximum air bypass and partial air bypass positions is directed to atmosphere and a second portion of the air moved by the rotors is directed to the air intake manifold of the engine,a second actuator operably connected to the slide assembly to selectively move the slide assembly between maximum air bypass, partial air bypass and minimum air bypass positions to vary the second portion of air directed to the air intake manifold of the internal combustion engine, thereby selectively increasing or decreasing the mass of air flow and associated internal compression ratio of the air moved by the rotors to the combustion chamber of the internal combustion engine,a power transmission drivably connecting the internal combustion engine to the rotors of the supercharger whereby the internal combustion engine operates the supercharger to generate a supply of air,an apparatus for introducing fuel into the air in the combustion chamber of the internal combustion engine corresponding to the mass of air flow delivered to the combustion chamber of the internal combustion engine by the supercharger,a sensor for providing signals representative of the power demanded of the internal combustion engine, anda control processor responsive to the signals from the sensor to provide command signals for operating the second actuator, said control processor being operable to control the apparatus to regulate the amount of fuel introduced into the combustion chamber and the timing of the fuel injection into the combustion chamber of the internal combustion engine.

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