초록 ▼

The method involves receiving a plurality of current operating parameters of an engine during operation of engine and determining at least one of a current substitution ratio and a current peak cylinder pressure based on the plurality of current operating parameters. The method also involves determi

The method involves receiving a plurality of current operating parameters of an engine during operation of engine and determining at least one of a current substitution ratio and a current peak cylinder pressure based on the plurality of current operating parameters. The method also involves determining at least one of a target substitution ratio and a predefined peak cylinder pressure based on the plurality of current operating parameters and comparing at least one of the current substitution ratio with the target substitution ratio and the current peak cylinder pressure with the predefined peak cylinder pressure. The method also involves controlling a first power output from a plurality of engine cylinders and a second power output from an electric turbo-compounding system, based on the comparison of at least one of the current substitution ratio with the target substitution ratio and the current peak cylinder pressure with the predefined peak cylinder pressure.

대표청구항 ▼

1. A method comprising: receiving a plurality of current operating parameters of an engine during operation of the engine;determining a current substitution ratio based on the plurality of current operating parameters;determining a target substitution ratio based on the plurality of current operatin

1. A method comprising: receiving a plurality of current operating parameters of an engine during operation of the engine;determining a current substitution ratio based on the plurality of current operating parameters;determining a target substitution ratio based on the plurality of current operating parameters;comparing the current substitution ratio with the target substitution ratio; andcontrolling a first power output from a plurality of cylinders of the engine and a second power output from an electric turbo-compounding system coupled to the engine, based on the comparison of the current substitution ratio with the target substitution ratio. 2. The method of claim 1, wherein the plurality of current operating parameters comprise an intake manifold temperature, an intake manifold pressure, an ambient pressure, an ambient temperature, an air-fuel ratio, a quantity of exhaust gas recirculation, a compression ratio, a fuel injection timing, an engine speed, an engine load, a concentration of oxygen in an exhaust gas, a generator current, and a generator voltage. 3. The method of claim 1, wherein the controlling further comprises operating a generator of the electric turbo-compounding system as a motor to increase a speed and a boost pressure of the electric turbo-compounding system. 4. The method of claim 1, further comprising: determining a current peak cylinder pressure based on the plurality of current operating parameters;determining a predefined peak cylinder pressure based on the plurality of current operating parameters;comparing the current peak cylinder pressure with the predefined peak cylinder pressure;controlling the first power output from the plurality of cylinders of the engine and the second power output from the electric turbo-compounding system coupled to the engine based on the comparison of the current peak cylinder pressure with the predefined peak cylinder pressure. 5. The method of claim 4, wherein the controlling comprises reducing the first power output from the plurality of cylinders to less than or equal to a first predefined power output and increasing the second power output from the electric turbo-compounding system to greater than or equal to a second predefined power output if the current substitution ratio is less than the target substitution ratio and the current peak cylinder pressure is greater than the predefined peak cylinder pressure. 6. The method of claim 5, wherein the reducing comprises controlling a plurality of fuel injectors so as to control an amount of a plurality of fuels injected to at least one of the plurality of cylinders and an intake manifold and the increasing comprises reducing a speed of the electric turbo-compounding system to a predefined speed by operating a generator of the electric turbo-compounding system to extract work and control a boost pressure from the electric turbo-compounding system. 7. The method of claim 5, further comprising increasing the current substitution ratio to approximately equal to the target substitution ratio if the current substitution ratio is less than the target substitution ratio and reducing the current peak cylinder pressure to approximately equal to the predefined peak cylinder pressure if the current peak cylinder pressure is greater than the predefined peak cylinder pressure. 8. The method of claim 5, further comprising operating the plurality of cylinders at a predefined brake mean effective pressure. 9. A computer readable medium, having instructions stored thereon which, when executed, causes a processor-based unit for an engine to perform a method, the method comprising: receiving a plurality of current operating parameters of the engine during operation of the engine;determining a current substitution ratio based on the plurality of current operating parameters;determining a target substitution ratio based on the plurality of current operating parameters;comparing the current substitution ratio with the target substitution ratio; andcontrolling a first power output from a plurality of cylinders of the engine and a second power output from an electric turbo-compounding system coupled to the engine, based on the comparison of the current substitution ratio with the target substitution ratio. 10. The computer readable medium of claim 9, wherein the plurality of current operating parameters comprise an intake manifold temperature, an intake manifold pressure, an ambient pressure, an ambient temperature, an air-fuel ratio, a quantity of exhaust gas recirculation, a compression ratio, a fuel injection timing, an engine speed, an engine load, a concentration of oxygen in an exhaust gas, a generator current, and a generator voltage. 11. The computer readable medium of claim 9, wherein the controlling further comprises operating a generator of the electric turbo-compounding system as a motor to increase a speed and a boost pressure of the electric turbo-compounding system. 12. The computer readable medium of claim 9, wherein the method further comprises: determining a current peak cylinder pressure based on the plurality of current operating parameters;determining a predefined peak cylinder pressure based on the plurality of current operating parameters;comparing the current peak cylinder pressure with the predefined peak cylinder pressure;controlling the first power output from the plurality of cylinders of the engine and the second power output from the electric turbo-compounding system coupled to the engine based on the comparison of the current peak cylinder pressure with the predefined peak cylinder pressure. 13. The computer readable medium of claim 12, wherein the controlling comprises reducing the first power output from the plurality of cylinders to less than or equal to a first predefined power output and increasing the second power output from the electric turbo-compounding system to greater than or equal to a second predefined power output if the current substitution ratio is less than the target substitution ratio and the current peak cylinder pressure is greater than the predefined peak cylinder pressure. 14. The computer readable medium of claim 13, wherein the reducing comprises controlling a plurality of fuel injectors so as to control an amount of a plurality of fuels injected to at least one of an intake manifold and the plurality of cylinders and the increasing comprises reducing a speed of the electric turbo-compounding system to a predefined speed by operating a generator of the electric turbo-compounding system to extract work and control a boost pressure from the electric turbo-compounding system. 15. The computer readable medium of claim 13, wherein the method further comprises increasing the current substitution ratio to approximately equal to the target substitution ratio if the current substitution ratio is less than the target substitution ratio and reducing the current peak cylinder pressure to approximately equal to the predefined peak cylinder pressure if the current peak cylinder pressure is greater than the predefined peak cylinder pressure. 16. The computer readable medium of claim 13, wherein the method further comprises operating the plurality of cylinders at a predefined brake mean effective pressure. 17. A system comprising: an engine comprising a plurality of cylinders and a plurality of fuel injectors coupled to the plurality of cylinders;an electric turbo-compounding system coupled to the engine;a controller coupled to the engine and the electric turbo-compounding system; wherein the controller is configured to: receive a plurality of current operating parameters of the engine during operation of the engine;determine a current substitution ratio based on the plurality of current operating parameters;determine a target substitution ratio based on the plurality of current operating parameters;compare the current substitution ratio with the target substitution ratio; andcontrol a first power output from a plurality of cylinders of the engine and a second power output from the electric turbo-compounding system coupled to the engine, based on the comparison the current substitution ratio with the target substitution ratio. 18. The system of claim 17, further comprising a plurality of sensors for measuring the plurality of current operating parameters comprising an intake manifold temperature, an intake manifold pressure, an ambient air pressure, an ambient temperature, an air-fuel ratio, a quantity of exhaust gas recirculation, a compression ratio, a fuel injection timing, an engine speed, an engine load, a concentration of oxygen in an exhaust gas, a generator voltage, and a generator current. 19. The system of claim 17, wherein the controller is further configured to operating a generator of the electric turbo-compounding system as a motor to increase a speed and a boost pressure of the electric turbo-compounding system. 20. The system of claim 17, wherein the controller is further configured to: determine a current peak cylinder pressure based on the plurality of current operating parameters;determine a predefined peak cylinder pressure based on the plurality of current operating parameters;compare the current peak cylinder pressure with the predefined peak cylinder pressure;control the first power output from the plurality of cylinders of the engine and the second power output from the electric turbo-compounding system coupled to the engine based on the comparison of the current peak cylinder pressure with the predefined peak cylinder pressure. 21. The system of claim 20, wherein the controller is further configured to reduce the first power output from the plurality of cylinders to less than or equal to a first predefined power output and increase the second power output from the electric turbo-compounding system to greater than or equal to a second predefined power output if the current substitution ratio is less than the target substitution ratio and the current peak cylinder pressure is greater than the predefined peak cylinder pressure. 22. The system of claim 21, wherein the controller is further configured to control a plurality of fuel injectors so as to control an amount of a plurality of fuels injected to at least one of an intake manifold and the plurality of cylinders, the controller is further configured to reduce a speed of the electric turbo-compounding system to a predefined speed by operating a generator of the electric turbo-compounding system to extract work and control a boost pressure from the electric turbo-compounding system. 23. The system of claim 21, wherein the controller is further configured to perform increasing the current substitution ratio to approximately equal to the target substitution ratio if the current substitution ratio is less than the target substitution ratio and reducing the current peak cylinder pressure to approximately equal to the predefined peak cylinder pressure if the current peak cylinder pressure is greater than the predefined peak cylinder pressure. 24. The system of claim 21, wherein the controller is further configured to operate the plurality of cylinders at a predefined brake mean effective pressure.