# US 11,028,726 B2 · Starter air valve systems configured for low speed motoring

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- Number: US 11,028,726 B2
- Document ID: US11028726B2
- Status: Granted
- Kind: B2
- Application number: 16/387,717
- Filed: 2019-04-18
- Published: 2019-08-08
- Granted: 2021-06-08
- Earliest claimed: 2016-12-28
- Assignees: Hamilton Sundstrand Corporation
- Applicants: Hamilton Sundstrand Corporation
- Inventors: Boris N. Grigorov; Tyler J. Selstad; Leo J. Veilleux, Jr.
- Web page: https://patentgrep.com/patent/US11028726B2

## CPC

- F01D 19/00: Starting of machines or engines; Regulating, controlling, or safety means in connection therewith (warming-up before starting F01D25/10; turning or inching gear F01D25/34)
- F01D 17/06: responsive to speed
- F01D 19/02: dependent on temperature of component parts, e.g. of turbine-casing
- F02C 7/277: the starter being a {separate} turbine
- F16K 31/42: by means of electrically-actuated members in the supply or discharge conduits of the fluid motor (F16K31/40 takes precedence)
- F16K 37/0008: {Mechanical means (F16K37/0075 takes precedence)}
- G05D 7/0641: {using a plurality of throttling means (G05D7/067 takes precedence)}
- F05D 2260/60: Fluid transfer
- F05D 2270/30: Control parameters, e.g. input parameters
- F05D 2270/304: Spool rotational speed
- F05D 2270/62: Electrical actuators
- F05D 2270/70: Type of control algorithm
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A starter air valve (SAV) system can include a pressure actuated SAV actuator configured to be operatively connected to a SAV and a first pressure valve configured to selectively allow pressure from a pressure source to the SAV actuator when in fluid communication with the SAV actuator. The first pressure valve can be a pulse-width modulation solenoid valve configured to provide a duty cycle of pressure from the pressure source to the SAV actuator.

## Claims

### Claim 1

A starter air valve (SAV) system comprising:
a pressure actuated SAV actuator configured to be operatively connected to a SAV;
a first pressure valve configured to selectively allow pressure from a pressure source to the SAV actuator when in fluid communication with the SAV actuator, wherein the first pressure valve is a pulse-width modulation solenoid valve configured to provide a duty cycle of pressure from the pressure source to the SAV actuator;
a first controller in operable communication with at least the first pressure valve and configured to control the first pressure valve;
a second pressure valve configured to selectively allow pressure from the pressure source to the SAV actuator when in fluid communication with the SAV actuator;
a second controller in operable communication with at least the second pressure valve and configured to control the second pressure valve; and
a manual override (MOR) valve selector disposed between the first pressure valve, the second pressure valve, and the SAV actuator, the MOR valve selector configured to selectively fluidly connect the first pressure valve and the SAV actuator in a first position and to fluidly connect the second pressure valve and the SAV actuator in a second position.

### Claim 2 (depends on 1)

The system of claim 1, wherein the SAV includes at least one of a butterfly valve or an inline valve.

### Claim 3 (depends on 1)

The system of claim 1, wherein the first controller is an engine computer.

### Claim 4 (depends on 1)

The system of claim 1, wherein the second controller includes a secondary power source configure to be switched on when the MOR valve selector is in the second position.

### Claim 5 (depends on 4)

The system of claim 4, wherein the second controller includes a control module operatively connected to the second pressure valve.

### Claim 6 (depends on 5)

The system of claim 5, wherein the second controller includes a speed sensor operatively connected to the control module and configured to sense an engine speed for providing speed data to the control module.

### Claim 7 (depends on 1)

The system of claim 1, further comprising the pressure source operatively connected to the first pressure valve and the second pressure valve.

### Claim 8

A starter air valve (SAV) system comprising:
a pressure actuated SAV actuator configured to be operatively connected to a SAV;
a first pressure valve configured to selectively allow pressure from a pressure source to the SAV actuator when in fluid communication with the SAV actuator;
a second pressure valve configured to selectively allow pressure from the pressure source to the SAV actuator when in fluid communication with the SAV actuator; and
a manual override (MOR) valve selector disposed between the first pressure valve, the second pressure valve, and the SAV actuator, the MOR valve selector configured to selectively fluidly connect the first pressure valve and the SAV actuator in a first position and to fluidly connect the second pressure valve and the SAV actuator in a second position.