A diesel or diesel-like internal combustion engine drivably connected to a variable internal compression ratio supercharger that supplies varying amounts of air to the engine responsive to the load requirements of the engine. The supercharger has a pair of rotors concurrently driven by the engine to
A diesel or diesel-like internal combustion engine drivably connected to a variable internal compression ratio supercharger that supplies varying amounts of air to the engine responsive to the load requirements of the engine. The supercharger has a pair of rotors concurrently driven by the engine to move air to the engine. A slide assembly associated with screw rotors is movable with a controller relative to the rotors to bypass air to atmosphere and regulate the amount of air and pressure of the air compressed by the screw rotors to the engine to increase the engine's efficiency.
대표청구항▼
1. A supercharged internal combustion engine comprising: a diesel internal combustion engine having at least one combustion chamber,a supercharger for supplying air to the combustion chamber of the internal combustion engine,the supercharger includes a housing having a pair of chambers and an axial
1. A supercharged internal combustion engine comprising: a diesel internal combustion engine having at least one combustion chamber,a supercharger for supplying air to the combustion chamber of the internal combustion engine,the supercharger includes a housing having a pair of chambers and an axial passage located adjacent one of the chambers,said axial passage having an air bypass opening open to one of the chambers and atmosphere,a pair of rotors rotatable about parallel axes located in the chambers operable to move air through the housing to atmosphere and to the combustion chamber of the engine, andan air flow control apparatus operable to vary the mass and pressure of the air supplied to the combustion chamber of the internal combustion engine responsive to the power requirements of the internal combustion engine to vary the rate of flow of air delivered to the combustion chamber of the internal combustion engine at or above the naturally aspirated rate of air flow into the combustion chamber of the internal combustion engine,said air flow control apparatus including a slide assembly axially movable in the passage in the housing for axial movement between maximum air bypass, partially air bypass and minimum air bypass positions relative to the axes of rotation of 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 partially air bypass positions is directed uncompressed to atmosphere and a second portion of the air moved by the rotors is directed to the combustion chamber of the engine,an actuator operably connected to the slide assembly to selectively move the slide assembly between maximum air bypass, partially air bypass and minimum air bypass positions to vary the second portion of air directed to the combustion chamber of the internal combustion engine, thereby selectively increasing or decreasing the mass of air 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,a fuel injector for introducing fuel into the air in the combustion chamber of the internal combustion engine corresponding to the rate of flow of air delivered to the combustion chamber of the internal combustion engine by the supercharger,a sensor for providing signals representative of the load requirements of the internal combustion engine, anda control processor configured to;responsive to the signals from the sensor, provide command signals for operating the actuator and control the fuel injector 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. 2. The supercharged internal combustion engine of claim 1 wherein: the rotors comprise a male screw rotor and a female screw rotor andsaid air bypass opening being open to a side portion of the chamber accommodating the male screw rotor. 3. The supercharged internal combustion engine of claim 1 wherein: the slide assembly comprises a movable first member and a second member,said air bypass opening having a portion thereof located between said first and second members,said actuator being operably connected to the first member to move the first member relative to the second member to maximum air bypass, partially air bypass and minimum air bypass positions relative to the air bypass opening. 4. The supercharged internal combustion engine of claim 1 including: a second air control slide assembly operable to control the volume ratio of air moved by the rotors through the housing. 5. The supercharged internal combustion engine of claim 1 wherein: the housing has a pair of chambers,said rotors being located in said chambers,a channel in the housing open to said pair of chambers,an air control slide member movably located in said channel for controlling the volume ratio of air moved by the rotors through the housing, anda second actuator operably connected to the air control slide member to move the air control slide member relative to the rotors, said second actuator being coupled to the processor whereby command signals from the processor controls the operation of the second actuator. 6. The supercharged internal combustion engine of claim 5 wherein: the rotors comprise a male screw rotor and a female screw rotor. 7. The supercharged internal combustion engine of claim 1 including: an air cooler for cooling the air as it flows between the supercharger and the combustion chamber of the internal combustion engine. 8. The supercharged internal combustion engine of claim 1 including: an air mass flow sensor operable to generate an air mass flow signal of the air flowing from the supercharger to the combustion chamber of the internal combustion engine, said air mass flow signal being directed to the processor which controls the apparatus to regulate the amount of fuel injected into the combustion chamber of the internal combustion engine. 9. A supercharged internal combustion engine for supplying air to the engine comprising: an internal combustion engine having at least one combustion chamber for accommodating air under pressure and fuel,a supercharger for supplying air to the combustion chamber of the engine according to the load requirements of the engine,the supercharger includes a housing having a housing chamber and an axial passage located adjacent said housing chamber,rotors located in the housing chamber in-the housing operable to move air through the supercharger to atmosphere and to the combustion chamber of the engine,said axial passage in the housing including an air bypass opening open to the housing chamber and atmosphere,an air flow control apparatus including a slide assembly on axially movable in tile passage in the housing for axial movement between maximum air bypass, partially air bypass and minimum air bypass positions relative to the rotors and air bypass opening whereby a first portion of air moved by the rotors is expelled uncompressed from said chamber to atmosphere through the air bypass opening when the slide assembly is in the maximum air bypass and partially air bypass positions and a second portion of the air moved by the rotor is directed to the combustion chamber of the internal combustion engine,an actuator operably connected to the slide assembly to selectively axially move the slide assembly between maximum air bypass, partially air bypass and minimum air bypass positions to vary the volume of the second portion of air directed to the combustion chamber of the internal combustion engine thereby selectively increasing or decreasing the mass of air and associated internal compression ratio of the air moved by the rotors to the combustion chamber of the engine,synchronizing gears for rotating the rotors to generate a supply of air,a fuel injector for introducing fuel into the air in the combustion chamber corresponding to the rate of flow of air directed to the combustion chamber of the engine by the supercharger,a control processor configured to;responsive to the load requirements of the engine, operate the actuator to regulate the position of the slide assembly, control the amount of air directed to the combustion chamber of the engine, and control the fuel injector to regulate the amount of fuel introduced into the combustion chamber. 10. The supercharged internal combustion engine of claim 9 wherein: the rotors comprise a male screw rotor and a female screw rotor andsaid air bypass opening being open to a side portion of the chamber accommodating the male screw rotor. 11. The supercharged internal combustion engine of claim 9 wherein: the slide assembly comprises a movable first member and a second member,said air bypass opening having a portion thereof located between said first and second members,said actuator being operably connected to the first member to move the first member relative to the second member to maximum air bypass, partially air bypass and minimum air bypass positions relative to the air bypass opening. 12. The supercharged internal combustion engine of claim 9 including: a second air control slide assembly operable to control the volume ratio of air moved by the rotors through the housing. 13. The supercharged internal combustion engine of claim 9 wherein: the housing has a channel open to said chamber,an air control slide member movably located in said channel for controlling the volume ratio of air moved by the rotors through the housing, anda second actuator operably connected to the air control slide member to move the air control slide member relative to the rotors, said second actuator being coupled to the processor whereby command signals from the processor controls the operation of the second actuator. 14. The supercharged internal combustion engine of claim 13 wherein: the rotors comprise a male screw rotor and a female screw rotor. 15. The supercharged internal combustion engine of claim 9 including: an air cooler for cooling the air as it flows between the supercharger and the combustion chamber of the internal combustion engine. 16. The supercharged internal combustion engine of claim 9 including: an air mass flow sensor operable to generate an air mass flow signal of the air flowing from the supercharger to the combustion chamber of the internal combustion engine, said air mass flow signal being directed to the processor which controls the fuel injector to regulate the amount of fuel injected into the combustion chamber of the internal combustion engine. 17. A supercharged internal combustion engine comprising: an internal combustion engine having an air intake manifold for air near or above atmospheric pressure and at least one combustion chamber,a supercharger for supplying air to the combustion chamber of the internal combustion engine,a power transmission drivably connecting the internal combustion engine to the supercharger whereby the internal combustion engine operates the supercharger to generate a supply of air,said supercharger including an air flow control apparatus operable to vary the mass and pressure of the air supplied to the combustion chamber of the internal combustion engine responsive to the load requirements of the internal combustion engine to vary the rate of flow of air delivered to the combustion chamber of the internal combustion engine near or above the naturally aspirated rate of air flow into the combustion chamber of the internal combustion engine,said supercharger having an internal chamber with an air inlet opening, an air outlet opening and a passage having an air bypass opening between the air inlet opening and air outlet opening, said air outlet opening being in air flow communication with the combustion chamber of the internal combustion engine, said bypass opening in air flow communication with a low air pressure location,a rotor located in the chamber operable to move air from the air inlet opening to the air outlet opening and to the air bypass opening,said air flow control apparatus including a member located in the passage and movable axially relative to the rotor toward the air inlet opening between maximum air bypass, partially air bypass and minimum air bypass positions relative to the rotor and the bypass opening whereby a first portion of air moved by the rotor is expelled uncompressed through the bypass opening to the low pressure location when the member is in the maximum air bypass and partially air bypass positions and the remainder of the air moved by the rotor is directed to the combustion chamber of the internal combustion engine,an actuator operably connected to the member to selectively move the member axially relative to the rotor between maximum air bypass, partially air bypass and minimum air bypass positions to vary the amount of the remainder of air directed to the combustion chamber of the internal combustion engine, anda fuel injector for introducing fuel into the air in the combustion chamber of the internal combustion engine corresponding to the rate of flow of air delivered to the combustion chamber of the internal combustion engine by the supercharger. 18. The supercharged internal combustion engine of claim 17 wherein: the supercharger includes a housing having a pair of chambers, said passage and air bypass opening open to one of the chambers and atmosphere, anda pair of rotors located in the chambers in the housing. 19. The supercharged internal combustion engine of claim 17 including: an air cooler for cooling the air as it flows between the supercharger and the combustion chamber of tile internal combustion engine. 20. The supercharged internal combustion engine of claim 17 including: a sensor for providing signals representative of the power requirements of the engine, anda control processor configured to:responsive to the signals from the sensor, provide command signals for operating the actuator and control the amount of fuel injected into the combustion chamber and the timing of the fuel introduced into the air in the combustion chamber. 21. The supercharged internal combustion engine of claim 17 wherein: the supercharger includes a housing having a pair of chambers and a channel open to the pair of chambers,a pair of rotors located in said chambers,an air control slide member movably located in said channel for controlling the volume ratio of air moved by the rotors through the housing, andan actuator connected to the air control slide member operable to move the air control slide member relative to said rotors thereby controlling the volume ratio of air moved by the rotors. 22. A supercharged internal combustion engine comprising: an internal combustion engine having an air intake manifold for air near or above atmospheric pressure and at least one combustion chamber adapted to be operatively connected to a load,a supercharger operable to supply air to the engine,a power transmission operably connecting the engine to the supercharger whereby the supercharger is operated responsive to the speed of the engine,the supercharger comprisinga housing having generally parallel chambers and a passage parallel to the chambers, said passage having an air bypass opening open to atmosphere,a pair of rotors located in the chambers operatively connected to the power transmission to rotate the rotors whereby the rotors move air to the engine,a slide assembly having a member located in the passage adjacent one rotor, said member being movable between maximum air bypass, partially air bypass and minimum air bypass positions relative to the air bypass opening to control the amount of uncompressed air discharged by rotors through the air bypass opening to atmosphere and the balance of compressed air moved by the rotors to the combustion chamber of the engine, anda sensor operable to generate a signal corresponding to the power requirements of the engine,an actuator connected to the member operable to move the member in the passage axially relative to the one rotor between maximum air bypass, partially air bypass and minimum air bypass positions, anda control processor configured to:responsive to the signal from the sensor, provide command signals that operate the actuator, move the member between maximum air bypass, partially air bypass and minimum air bypass positions and control the amount of fuel injected into the combustion chamber and the start of the timing of the fuel injection into the combustion chamber. 23. The supercharged internal combustion engine of claim 22 including: an air cooler operatively connected to the supercharger and engine for cooling air flowing from the supercharger to the engine. 24. The supercharged internal combustion engine of claim 22 wherein: the pair of rotors comprisea male screw,a female screw, andthe member of the slide assembly located in said passage in the housing whereby when the member is in a maximum air bypass or partially air bypass position excess uncompressed air pumped by the screws flows through the bypass opening to atmosphere. 25. The supercharged internal combustion engine of claim 22 wherein: said housing has a channel open to said parallel chambers,an air control slide member movably located in said channel for controlling the volume ratio of air moved by the rotors to the combustion chamber of the engine, andan actuator connected to the air control slide member operable to move the air control slide member relative to said rotors thereby controlling the volume ratio of air moved by the rotors.
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