Engine speed control system

Patent metadata

Field	Value
Publication number	US-11111861-B2
Application number	US-201815910850-A
Country	US
Kind code	B2
Filing date	Mar 2, 2018
Priority date	Mar 3, 2017
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

Systems and apparatuses include an engine including a fuel tank, a carburetor including a throttle valve movable between a first throttle position and a second throttle position, a governor system configured to move the throttle valve, and a speed control system including a control lever defining a first actuation distance, and a bellcrank movable between an idle position and a high speed position and coupled to the governor system. The bellcrank defining a second actuation distance that is different than the first actuation distance.

First claim

What is claimed is:

1. An engine comprising:
a fuel tank;
a carburetor including a throttle valve movable between a first throttle position and a second throttle position;
a governor system configured to move the throttle valve; and
a speed control system including
a control lever movable between a first position and a second position, and defining a control lever coupling structure that defines a first actuation distance, and
a bellcrank movable between an idle position and a high speed position, and defining a first bellcrank coupling structure and a second bellcrank coupling structure that defines a second actuation distance that is different than the first actuation distance, the bellcrank coupled to the governor system,

wherein the speed control system is structured to be controlled by a remote actuator configured to engage one of the control lever coupling structure, the first bellcrank coupling structure, or the second bellcrank coupling structure to move the control lever and the bellcrank, and
wherein the engine is structured to support the remote actuator to provide control from a first lever direction when the remote actuator engages the control lever coupling structure, a second lever direction opposed to the first lever direction when the remote actuator engages the control lever coupling structure, a first bellcrank direction when the remote actuator engages the first bellcrank coupling structure, a second bellcrank direction opposed to the first bellcrank direction when the remote actuator engages the first bellcrank coupling structure, and a third bellcrank direction different than the first bellcrank direction and the second bellcrank direction when the remote actuator engages the second bellcrank coupling structure.

2. The engine of claim 1 , wherein the first actuation distance is about 27.7 millimeters, and the second actuation distance is selected from one of 15 millimeters, 17.5 millimeters, and 20 millimeters.

3. The engine of claim 1 , wherein the control lever coupling structure includes an aperture sized to receive a solid wire actuator of the remote actuator.

4. The engine of claim 1 , wherein the first bellcrank coupling structure includes an aperture configured to engage one of a solid wire actuator and a soft wire actuator of the remote actuator.

5. The engine of claim 1 , wherein the bellcrank is coupled to the control lever via a control link so that moving the control lever between the first position and the second position moves the bellcrank between the idle position and the high speed position.

6. The engine of claim 1 , wherein the control lever and the bellcrank are coupled to a bracket.

7. The engine of claim 6 , wherein the bellcrank can be fixed to the bracket so that the bellcrank is inhibited from moving relative to the bracket.

8. The engine of claim 1 , further comprising an electrical shutoff element positioned to be actuated by the control lever.

9. The engine of claim 8 , wherein the electrical shutoff element includes an ignition ground switch.

10. The engine of claim 8 , wherein the control lever is grounded to the engine, and wherein the electrical shutoff element is an ignition ground wire configured to ground an ignition circuit when it contacts the control lever.

11. The engine of claim 1 , further comprising a transport valve fluidly coupled between the fuel tank and the carburetor, the transport valve including a valve element moveable between
an open valve position allowing fuel flow between the fuel tank and the carburetor, and
a closed valve position preventing fuel flow between the fuel tank and the carburetor,
wherein the valve element is moveable in response to the control lever.

12. The engine of claim 1 , wherein the control lever and the bellcrank operate independently so that the bellcrank affects engine speed and the control lever controls an ignition kill circuit and a fuel shutoff.

13. The engine of claim 1 , wherein the speed control system can be arranged in a remote control mode, a manual control mode, or a fixed speed mode.

14. The engine of claim 1 , wherein the speed control system includes a control link coupling the control lever to the bellcrank.

15. The engine of claim 1 , wherein a position of the control lever is controlled by the bellcrank.

16. The engine of claim 1 , wherein the control lever is moveable between a high speed position, a low speed position, and an off position.

17. The engine of claim 1 , wherein the control lever controls an ignition kill circuit, a fuel shutoff, and affects engine speed.

18. The engine of claim 1 , wherein the first bellcrank coupling structure further defines a third actuation distance that is less than the second actuation distance.

19. The engine of claim 18 , wherein the second actuation distance is about twenty millimeters and the third actuation distance is about fifteen millimeters.

20. The engine of claim 19 , wherein the bellcrank further defines a fourth actuation distance that is about 17.5 millimeters.

Assignees

• Briggs & Stratton Llc

Inventors

• Dlugi Zach
• Halfmann Aaron
• Clasen Kyle
• Roth David

Classifications

• F02D9/107

  Manufacturing or mounting details · CPC title

• F02D2009/023

  Engine speed · CPC title

• F02D2009/0245

  Shutting down engine, e.g. working together with fuel cut-off · CPC title

• F02D2009/0213

  Electronic or electric governor · CPC title

• F02D9/1065 Primary

  Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like · CPC title