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A gas turbine engine including a gas generator module and a reduction gearbox module. The gas generator module has an axis which extends longitudinally along a centreline of the gas generator module, and the reduction gearbox module has an axis which extending longitudinally along the centreline of

A gas turbine engine including a gas generator module and a reduction gearbox module. The gas generator module has an axis which extends longitudinally along a centreline of the gas generator module, and the reduction gearbox module has an axis which extending longitudinally along the centreline of the reduction gearbox and is offset from said generator axis. The reduction gearbox is driven by an intermediate shaft angled relative to the turbine output shaft.

대표청구항 ▼

A gas turbine engine including a gas generator module and a reduction gearbox module. The gas generator module has an axis which extends longitudinally along a centreline of the gas generator module, and the reduction gearbox module has an axis which extending longitudinally along the centreline of

A gas turbine engine including a gas generator module and a reduction gearbox module. The gas generator module has an axis which extends longitudinally along a centreline of the gas generator module, and the reduction gearbox module has an axis which extending longitudinally along the centreline of the reduction gearbox and is offset from said generator axis. The reduction gearbox is driven by an intermediate shaft angled relative to the turbine output shaft. a variable cam timing system.10. A system for controlling an engine, the engine having a first group of cylinders and a second group of cylinders, the system comprising: an intake manifold coupled to the engine; a device coupled to the first group of cylinders for controlling the flow of air exiting said manifold and entering the first group of cylinders; and a controller operating the first group of cylinders to inject into the first group of cylinders before a combustion event in such first group of cylinders a mixture of fuel and air at a rich of stoichiometry air-fuel ratio for burning in such first group of cylinders during such combustion event therein, and to inject into the second group of cylinders before a combustion event in such second group of cylinder mixture of the fuel and air at a lean of stoichiometry air-fuel ratio for burning in such second group of cylinders during such combustion event therein, the amount of the fuel in the first group of cylinders being greater than the amount of the fuel in the second group of cylinders, said controller subsequently adjusting said device to minimize a torque imbalance between the first group of cylinders and the second group of cylinders. 11. The system as set forth in claim 10 wherein said device is a variable cam timing system.12. A method for controlling temperature of an emission control device coupled to an engine, the engine having a first group of cylinders and a second group of cylinders, the engine coupled to an intake manifold, the engine further having an outlet control device for controlling flow exiting the manifold and entering the first group of cylinders, the method comprising: determining a rich of stoichiometry air/fuel ratio based on the temperature; determining a lean of stoichiometry air/fuel ratio; injecting a mixture of fuel and air in the first group of cylinders before a combustion event in such first group of cylinders for burning in such first group of cylinders during such combustion event therein, such mixture having said rich of stoichiometry air/fuel ratio; injecting a mixture of the fuel and air in the second group of cylinders before a combustion event in such second group of cylinders for burning in such second group of cylinders during such combustion event therein, said lean of stoichiometry air/fuel ratio; wherein the first group of cylinders has injected therein before such combustion event therein a greater amount of the fuel than the amount of the fuel injected before such combustion event in the second group of cylinders; and subsequently adjusting the outlet control device to minimize a torque imbalance between the first group of cylinders and the second group of cylinders. 13. A method for decontaminating an emission control device coupled to an engine, the engine having a first group of cylinders and a second group of cylinders, the engine coupled to an intake manifold, the engine further having an outlet control device for controlling flow exiting the manifold and entering the first group of cylinders, the method comprising: indicating contamination of the emission control device; in response to said indication,injecting into the first group of cylinders before a combustion event therein a mixture of fuel and air at a rich of stoichiometry air/fuel ratio based on temperature for burning in such first group of cylinders during such combustion event therein;injecting into the second group of cylinders before a combustion event therein a mixture of fuel and air at a lean of stoichiometry air/fuel ratio based on temperature for burning in such second group of cylinders during such combustion event therein; andsubsequently adjusting the outlet control device to minimize a torque imbalance between the first group of cylinders and the second group of cylinders.14. A method for controlling an engine, the engine having a first group of cylinders and a second group of cylinders, the engine coupled to an i