# US 2018/0023489 A1 · Single Input Engine Controller and System

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- Number: US 2018/0023489 A1
- Document ID: US20180023489A1
- Status: Published application
- Kind: A1
- Application number: 15/654,477
- Filed: 2017-07-19
- Published: 2018-01-25
- Earliest claimed: 2016-07-20
- Assignees: DeltaHawk Engines, Inc.
- Applicants: DeltaHawk Engines, Inc.
- Inventors: Dennis R. Webb; William J. Cranmer; Douglas A. Doers
- Web page: https://patentgrep.com/patent/US20180023489A1

## CPC

- F02D 31/008: {for idle speed control}
- B64C 11/303: {characterised by comprising a governor}
- B64C 11/305: {characterised by being influenced by other control systems, e.g. fuel supply}
- B64C 11/32: mechanical
- B64C 13/28: mechanical
- B64C 19/02: Conjoint controls
- B64D 31/06: actuated automatically
- F02D 37/00: Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D 2200/0625: Fuel consumption, e.g. measured in fuel liters per 100 kms or miles per gallon
- F02D 2200/10: Parameters related to the engine output, e.g. engine torque or engine speed
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- B64C: AEROPLANES; HELICOPTERS
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A single input engine controller and system are provided for translating a single input indicative of the amount of fuel to be supplied to an engine from a fuel control interface into separate signals for controlling the amount of fuel supplied to the engine and the RPM of a propeller powered by that engine. The single input controller translating the single input into the separate signal for the RPM of the propeller according to a fuel efficiency relationship between the fuel amount and the propeller RPM.

## Claims

### Claim 1

A single input aircraft engine and propeller control system comprising:
a fuel control interface to produce a first mechanical signal corresponding to a specific amount of fuel to be fed to an engine to produce a specific amount of horsepower, the specific amount of horsepower having a corresponding RPM setting for a propeller coupled to the engine, the RPM setting corresponding to a maximum fuel efficiency;
a single input engine controller coupled to the fuel control interface to receive the first mechanical signal, translate the first mechanical signal into a second mechanical signal indicative of the RPM setting corresponding to the specific amount of horsepower, and output a third mechanical signal indicative of the specific amount of fuel, the third mechanical signal being induced by the first mechanical signal;
a fuel distribution system coupled to the single input engine controller to receive the third mechanical signal, the third mechanical signal triggering the fuel distribution system to feed the specific amount of fuel to the engine; and
a propeller RPM controller coupled to the single input engine controller to receive the second mechanical signal, the second mechanical signal triggering the RPM controller to set the RPM of the propeller to the corresponding RPM setting.

### Claim 2

A single input aircraft engine and propeller control system comprising:
a fuel control interface to produce a first mechanical signal corresponding to a specific amount of fuel to be fed to an engine to produce a specific amount of horsepower, the specific amount of horsepower having a corresponding RPM setting for a propeller coupled to the engine, the RPM setting corresponding to a maximum fuel efficiency;
a housing having a first pivot point and a second pivot point;
a fuel control lever pivotably coupled to the first pivot point;
an RPM control lever having a cammed slot and being pivotably coupled to the second pivot point, the fuel control lever, and the fuel control interface such that the first mechanical signal induces the RPM control lever and the fuel control lever to pivot about the first and second pivot points, the cammed slot being shaped and sized to translate the pivoting of the RPM control lever into a second mechanical signal indicative of the RPM setting corresponding to the specific amount of horsepower;
a fuel distribution system pivotably coupled to the fuel control lever to receive a third mechanical signal induced by the pivoting of the fuel control lever, the third mechanical signal triggering the fuel distribution system to feed the specific amount of fuel to the engine; and
a propeller RPM controller slidably coupled to the cammed slot to receive the second mechanical signal induced by the pivoting of the RPM control lever, the second mechanical signal triggering the RPM controller to set the RPM of the propeller to the corresponding RPM setting.

### Claim 3 (depends on 2)

The control system of claim 2 further comprising:
an idle control lever pivotably coupled to the fuel control lever and the fuel distribution system to receive the third mechanical signal and pass the third mechanical signal to the fuel distribution system; and
an idle governor coupled to the idle control lever to idle the engine when the specific amount of horsepower indicated by the first mechanical signal produced by the fuel control interface is zero.

### Claim 4 (depends on 2)

The control system of claim 2 wherein the RPM control lever and the fuel control lever are pivotably coupled together by a linkage.

### Claim 5 (depends on 4)

The control system of claim 4 wherein the fuel control lever comprises a first end and a second end, wherein the first end is pivotably coupled to the first pivot point, and wherein the fuel control lever receives the first mechanical signal at the second end.

### Claim 6 (depends on 5)

The control system of claim 5 wherein the linkage is pivotably coupled to the fuel control lever at a position between the first end and the second end, and movement of the fuel control lever in response to the first mechanical signal induces movement of the RPM control lever.

### Claim 7 (depends on 4)

The control system of claim 4 wherein the RPM control lever comprises a third end and a fourth end, wherein the third end is pivotably coupled to the second pivot point, and wherein the RPM control lever receives the first mechanical signal at the fourth end.

### Claim 8 (depends on 7)

The control system of claim 7 wherein the linkage is pivotably coupled to the RPM control lever at the fourth end, and movement of the RPM control lever in response to the first mechanical signal induces movement of the fuel control lever.

### Claim 9 (depends on 2)

The control system of claim 2 wherein the RPM control lever comprises a third end and a fourth end, and wherein the cammed slot is positioned between the third end and the fourth end.

### Claim 10

A single input engine controller comprising:
a housing having a first pivot point and a second pivot point;
a fuel control lever pivotably coupled to the first pivot point;
an RPM control lever having a cammed slot and being pivotably coupled to the second pivot point and the fuel control lever to receive a first mechanical signal indicative of a specific amount of fuel, pivot about the second pivot point in response to the first mechanical signal, and induce the fuel control lever to pivot about the first pivot point, the cammed slot being shaped and sized to translate the pivoting of the RPM control lever into a second mechanical signal indicative of an RPM setting corresponding to the specific amount of fuel; and
wherein the pivoting of the fuel control lever induces a third mechanical signal proportional to the first mechanical signal and indicative of the specific amount of fuel.

### Claim 11 (depends on 10)

The controller of claim 10, wherein the specific amount of fuel is fed to an engine to produce a specific amount of horsepower, the controller further comprising:
an idle control lever pivotably coupled to the fuel control lever and a fuel distribution system to receive the third mechanical signal and pass the third mechanical signal to the fuel distribution system; and
an idle governor coupled to the idle control lever to idle the engine when the specific amount of horsepower indicated by the first mechanical signal is zero.

### Claim 12 (depends on 10)

The controller of claim 10 wherein the fuel control lever comprises a first end and a second end, wherein the first end is pivotably coupled to the first pivot point, and wherein the fuel control lever receives the first mechanical signal at the second end.

### Claim 13 (depends on 12)

The controller of claim 12 wherein the RPM control lever and the fuel control lever are pivotably coupled together by a linkage that transfers the pivot motion of the fuel control lever to the RPM control lever.

### Claim 14 (depends on 10)

The controller of claim 10 wherein the RPM control lever comprises a third end and a fourth end, wherein the third end is pivotably coupled to the second pivot point, and wherein the RPM control lever receives the first mechanical signal at the fourth end.

### Claim 15 (depends on 10)

The controller of claim 10 wherein the RPM control lever and the fuel control lever are pivotably coupled together by a linkage that transfers the pivot motion of the RPM control lever to the fuel control lever.