초록 ▼

Apparatus for regulating the flow rate of fuel to a turboshaft engine in acceleration or in deceleration, the engine having a free turbine and a core engine, the apparatus comprising sensors transmitting information to regulator means, said information relating: to a first speed of rotation NTL of s

Apparatus for regulating the flow rate of fuel to a turboshaft engine in acceleration or in deceleration, the engine having a free turbine and a core engine, the apparatus comprising sensors transmitting information to regulator means, said information relating: to a first speed of rotation NTL of said free turbine; to a second speed of rotation Ng of said engine's gas generator; to an internal temperature T4 of the gas at the inlet to the free turbine; to the external pressure; and to the external temperature. The apparatus further comprises control means activated by said regulator means to actuate a fuel metering system of the engine. In addition, the regulator means evaluates the flow rate of fuel to be supplied to the engine in acceleration or in deceleration on the basis of at least one optimum regulation relationship, said regulation relationship determining a main modulated flow rate as a function of a modulated speed of rotation.

대표청구항 ▼

What is claimed is: 1. A method for regulating the fuel flow rate of a turboshaft engine in acceleration or in deceleration, the engine having a free turbine and engine's gas generator, there being sensors for transmitting to regulator means information relating to a first speed of rotation of said

What is claimed is: 1. A method for regulating the fuel flow rate of a turboshaft engine in acceleration or in deceleration, the engine having a free turbine and engine's gas generator, there being sensors for transmitting to regulator means information relating to a first speed of rotation of said free turbine, to a second speed of rotation of said engine's gas generator; to an internal temperature of the gas at the inlet to the free turbine, to the external pressure; and to the external temperature, there further being control means activated by said regulator means to actuate a fuel metering system of said engine; the method comprising determining the fuel flow rate to be delivered to said engine in acceleration or in deceleration equal to a main modulated flow rate which is a function of a modulated speed of rotation, said main modulated flow rate depending on the external temperature and on the external pressure, said modulated speed of rotation corresponding to the second speed of rotation of said engine's gas generator modulated by the external temperature, and then delivering said determined fuel flow rate to the engine, wherein said main modulated flow rate is equal to a modulated flow rate that is obtained by the following relationship in which CH″ represents said modulated flow rate, CH represents the flow rate of fuel delivered to the engine, P0 represents the external pressure, T0 represents the external temperature, α represents a first power and β represents a second power: