초록 ▼

An exhaust gas turbocharger for an internal combustion engine includes an exhaust gas turbine in the exhaust gas system and a compressor in the intake system for producing compressed charge air. A compressor rotor is arranged in a compressor inlet channel. In order to achieve a greater range of util

An exhaust gas turbocharger for an internal combustion engine includes an exhaust gas turbine in the exhaust gas system and a compressor in the intake system for producing compressed charge air. A compressor rotor is arranged in a compressor inlet channel. In order to achieve a greater range of utilization, an adjustable shutoff element is arranged in the compressor inlet channel, upstream from the compressor rotor, for variable adjustment of the effective cross-section.

대표청구항 ▼

An exhaust gas turbocharger for an internal combustion engine includes an exhaust gas turbine in the exhaust gas system and a compressor in the intake system for producing compressed charge air. A compressor rotor is arranged in a compressor inlet channel. In order to achieve a greater range of util

An exhaust gas turbocharger for an internal combustion engine includes an exhaust gas turbine in the exhaust gas system and a compressor in the intake system for producing compressed charge air. A compressor rotor is arranged in a compressor inlet channel. In order to achieve a greater range of utilization, an adjustable shutoff element is arranged in the compressor inlet channel, upstream from the compressor rotor, for variable adjustment of the effective cross-section. mprising the acts of: determining an element characteristic of the heating element; establishing a strategy to heat the water, the strategy being based on the element characteristic and including at least two conditions, each condition specifying a ratio of a maximum power deliverable to the heating element, at least one of the ratios being between zero and one hundred percent; sensing a temperature of the water in the tank; determining an amount of power to be provided to the heating element based on the strategy and the water temperature; and transmitting the amount of power to the heating element. 13. A method as set forth in claim 12 wherein the determining act includes determining the ratio of the maximum power to be provided by the heating element based on the water temperature, and wherein the transmitting act includes transmitting an amount of power corresponding to the determined ratio. 14. A method as set forth in claim 13 wherein a first ratio is one hundred percent of the maximum power deliverable to the heating element and a second ratio is zero percent of the maximum power deliverable to the heating element. 15. A method as set forth in claim 13 wherein a first condition includes a first temperature range and a second condition includes a second temperature range, and wherein determining a ratio of the maximum power includes determining whether the water temperature is within the first temperature range. 16. A method as set forth in claim 13 wherein a first condition includes a first state of the water heater and wherein the second condition includes a second state of the water heater. 17. A method as set forth in claim 16 wherein the first state is a draw-down state and the second state is a recovery state. 18. A method as set forth in claim 16 further comprising: sensing a second temperature of the water in the tank; and wherein the act of determining an amount of power is further based on the second temperature. 19. A method as set forth in claim 18 wherein the first temperature is sensed by a first sensor and wherein the second temperature is sensed by a second sensor. 20. A method as set forth in claim 18 wherein the second temperature is sensed after the first temperature. 21. A method as set forth in claim 20 wherein the method further comprises calculating a slope of a line based on the first and second temperatures, wherein the calculated slope signifies a current water heater state, and wherein determining a ratio of the maximum power includes determining whether the current water heater state is within the first state. 22. A method as set forth in claim 20 wherein the method further comprises comparing the first and second temperatures, wherein the comparison signifies a current water heater state, and wherein the determining a ratio of the maximum power includes determining whether the current water heater state is within the first state. 23. A method as set forth in claim 13 wherein the at least two conditions include one or more temperature ranges and one or more states. 24. A method as set forth in claim 23 wherein the one or more temperature ranges is a subset of the one or more states. 25. A method as set forth in claim 12 and further comprising: repeating the act of sensing a temperature of the water; storing multiple sensed temperatures, the storing act results in a usage pattern; and wherein the act of determining an amount of power is further based on the usage pattern. 26. A method as set forth in claim 12 and further comprising: repeating the act of sensing a temperature of the water; storing multiple sensed temperatures, the storing act results in a water use history; and wherein the act of determining an amount of power is further based on the water use history. 27. A method as set forth in claim 12 wherein the element characteristic includes an element type. 28. A method as set forth in claim 12 wherein the element characteristic includes an element wattage.