A method including generating a first duty cycle value for the PWM; monitoring a current value of a parameter; generating a duty cycle limit value for the PWM, including activating more than one duty cycle limit functions (752, 754, 756) based on correspon...

A locking plate (160) for restricting rotation of a fastener (140) connecting a first component (124) of a gas turbine engine (20) and a second component (122) of a gas turbine engine (20) includes a base (162) having a planar surface (164) receivable in o...

A fuel system (10) for an aircraft comprises a boost pump (22), a main fuel pump (12) and a motive pump (14). The boost pump (22) receives fuel from a storage unit (20). The main fuel pump (12) receives fuel from the boost pump (22) and delivers fuel to a ...

Systems and methods for providing stepping actuations in a power generation unit 104 are disclosed. Certain embodiments herein may relate to manipulating actuators to produce a desired output in a power generation unit 104 without disrupting production by ...

A cooling arrangement for a gas turbine engine. The cooling arrangement comprises a discharge channel (30) for air flow from a compressor, a first cooling channel (44) and at least one aperture (40) providing communication between the flow of air through t...

An assembly can include a turbine housing that includes a bore, a wastegate seat and two wastegate passages that extend to the wastegate seat; a rotatable wastegate shaft configured for receipt by the bore; a wastegate arm extending from the wastegate shaf...

One embodiment of the present invention is a unique gas turbine engine. Another embodiment of the present invention is also a unique gas turbine engine. A further embodiment is a unique method for operating a gas turbine engine. Other embodiments include a...

The arrangement (100) has a bypass channel (118) for bypassing a turbine (102), and a bypass valve device i.e. wastegate (108), for regulating bypass current (C). The bypass valve device comprises an actuator (110) i.e. electric rotation drive, an actuator...

The turbo-supercharger (1) has a housing (8a, 8b), at least one turbine (2) in the casing, and variable turbine geometry, by which the charge air pressure is regulated. There is a bypass device (20, 21, 22) for the exhaust gas, to bridge the turbine, at le...