Patents by Inventor Vojtech Jirasek
Vojtech Jirasek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11964750Abstract: A control system for an engine operatively coupled with a propeller and methods for controlling an engine operatively coupled with a propeller are provided. In one example aspect, the control system includes a controller and an electric propeller governor. The electric propeller governor includes a motor operatively coupled with a flyweight governor spring. The motor is communicatively coupled with the controller. The controller is operable to receive data indicative of the speed of the propeller, determine if the measured speed exceeds a propeller speed threshold, and if the threshold is exceeded, the controller is configured to change a propeller speed set point. Particularly, the controller can cause the motor to change the preload on the flyweight governor spring, which in turn causes adjustment of the propeller speed set point. In this way, propeller speed overshoot is prevented during fast acceleration of the engine.Type: GrantFiled: March 7, 2019Date of Patent: April 23, 2024Assignee: General Electric CompanyInventors: Jozef Zakucia, Vojtech Jirasek, Milan Matejka
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Publication number: 20240125279Abstract: A variable pitch propeller assembly operatively coupled with an engine and methods for controlling the pitch of a plurality of propeller blades thereof is provided. In one example aspect, the variable pitch propeller assembly includes features for combining overspeed, feathering, and reverse functionality in a single secondary control valve. The secondary control valve is operable to selectively allow a controlled amount of hydraulic fluid to flow to or from a pitch actuation assembly such that the pitch of the propeller blades can be adjusted to operate the variable pitch propeller assembly in one of a constant speed mode, a feather mode, and a reverse mode.Type: ApplicationFiled: December 21, 2023Publication date: April 18, 2024Inventors: Giuseppe Cervelli, Simone Castellani, Miriam Manzoni, Giuseppe Bellocchio, Vojtech Jirasek
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Patent number: 11873771Abstract: A variable pitch propeller assembly operatively coupled with an engine and methods for controlling the pitch of a plurality of propeller blades thereof is provided. In one example aspect, the variable pitch propeller assembly includes features for combining overspeed, feathering, and reverse functionality in a single secondary control valve. The secondary control valve is operable to selectively allow a controlled amount of hydraulic fluid to flow to or from a pitch actuation assembly such that the pitch of the propeller blades can be adjusted to operate the variable pitch propeller assembly in one of a constant speed mode, a feather mode, and a reverse mode.Type: GrantFiled: December 5, 2022Date of Patent: January 16, 2024Assignees: GE AVIO S.R.L., GE AVIATION CZECH S.R.O.Inventors: Giuseppe Cervelli, Simone Castellani, Miriam Manzoni, Giuseppe Bellocchio, Vojtech Jirasek
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Publication number: 20230106850Abstract: A variable pitch propeller assembly operatively coupled with an engine and methods for controlling the pitch of a plurality of propeller blades thereof is provided. In one example aspect, the variable pitch propeller assembly includes features for combining overspeed, feathering, and reverse functionality in a single secondary control valve. The secondary control valve is operable to selectively allow a controlled amount of hydraulic fluid to flow to or from a pitch actuation assembly such that the pitch of the propeller blades can be adjusted to operate the variable pitch propeller assembly in one of a constant speed mode, a feather mode, and a reverse mode.Type: ApplicationFiled: December 5, 2022Publication date: April 6, 2023Inventors: Giuseppe Cervelli, Simone Castellani, Miriam Manzoni, Giuseppe Bellocchio, Vojtech Jirasek
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Patent number: 11519346Abstract: A variable pitch propeller assembly operatively coupled with an engine and methods for controlling the pitch of a plurality of propeller blades thereof is provided. In one example aspect, the variable pitch propeller assembly includes features for combining overspeed, feathering, and reverse functionality in a single secondary control valve. The secondary control valve is operable to selectively allow a controlled amount of hydraulic fluid to flow to or from a pitch actuation assembly such that the pitch of the propeller blades can be adjusted to operate the variable pitch propeller assembly in one of a constant speed mode, a feather mode, and a reverse mode.Type: GrantFiled: July 2, 2020Date of Patent: December 6, 2022Assignees: GE AVIO S.R.L., GE AVIATION CZECH S.R.O.Inventors: Giuseppe Cervelli, Simone Castellani, Miriam Manzoni, Giuseppe Bellocchio, Vojtech Jirasek
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Patent number: 11124309Abstract: An engine control system includes a first user control lever configured for rotational movement between a first control position and a second control position and a second user control lever configured for rotational movement between a third control position and a fourth control position. The first user control lever is configured for operational control of an engine in a first control mode and the second user control lever is configured for operational control of the engine in a second control mode, such as a backup mode. A mechanical link couples the first user control lever to the second user control lever with at least one angular offset. As a result of the angular offset, the second user control lever can be maintained in a safe operating position relative to the first user control lever position.Type: GrantFiled: January 9, 2018Date of Patent: September 21, 2021Assignee: General Electric CompanyInventors: Philippe JeanBaptist Vertenoeuil, Michele D'Ercole, Vojtech Jirasek, Milan Matejka
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Publication number: 20210079855Abstract: A variable pitch propeller assembly operatively coupled with an engine and methods for controlling the pitch of a plurality of propeller blades thereof is provided. In one example aspect, the variable pitch propeller assembly includes features for combining overspeed, feathering, and reverse functionality in a single secondary control valve. The secondary control valve is operable to selectively allow a controlled amount of hydraulic fluid to flow to or from a pitch actuation assembly such that the pitch of the propeller blades can be adjusted to operate the variable pitch propeller assembly in one of a constant speed mode, a feather mode, and a reverse mode.Type: ApplicationFiled: July 2, 2020Publication date: March 18, 2021Inventors: Giuseppe Cervelli, Simone Castellani, Miriam Manzoni, Giuseppe Bellocchio, Vojtech Jirasek
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Publication number: 20200283124Abstract: A control system for an engine operatively coupled with a propeller and methods for controlling an engine operatively coupled with a propeller are provided. In one example aspect, the control system includes a controller and an electric propeller governor. The electric propeller governor includes a motor operatively coupled with a flyweight governor spring. The motor is communicatively coupled with the controller. The controller is operable to receive data indicative of the speed of the propeller, determine if the measured speed exceeds a propeller speed threshold, and if the threshold is exceeded, the controller is configured to change a propeller speed set point. Particularly, the controller can cause the motor to change the preload on the flyweight governor spring, which in turn causes adjustment of the propeller speed set point. In this way, propeller speed overshoot is prevented during fast acceleration of the engine.Type: ApplicationFiled: March 7, 2019Publication date: September 10, 2020Inventors: Jozef Zakucia, Vojtech Jirasek, Milan Matejka
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Publication number: 20190210736Abstract: An engine control system includes a first user control lever configured for rotational movement between a first control position and a second control position and a second user control lever configured for rotational movement between a third control position and a fourth control position. The first user control lever is configured for operational control of an engine in a first control mode and the second user control lever is configured for operational control of the engine in a second control mode, such as a backup mode. A mechanical link couples the first user control lever to the second user control lever with at least one angular offset. As a result of the angular offset, the second user control lever can be maintained in a safe operating position relative to the first user control lever position.Type: ApplicationFiled: January 9, 2018Publication date: July 11, 2019Inventors: Philippe JeanBaptist Vertenoeuil, Michele D'Ercole, Vojtech Jirasek, Milan Matejka