Internal combustion engine with electric starting system

Patent metadata

Field	Value
Publication number	US-11639681-B2
Application number	US-202217882716-A
Country	US
Kind code	B2
Filing date	Aug 8, 2022
Priority date	Jul 12, 2018
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

An engine including an engine block having a cylinder defining a front of the engine, a blower housing coupled to the engine block and defining a hot half positioned adjacent the front of the engine and a cool half opposite the hot half, and an electric starter system positioned within the blower housing. The electric starting system includes a starter mount assembly coupled to the blower housing, an electric starter motor retained by the starter mount assembly and positioned in the cool half, and a battery mounted to the blower housing and positioned in the cool half. The battery is electrically coupled to the electric starter motor.

First claim

What is claimed is:

1. An engine, comprising:
an engine block including a cylinder, the cylinder defining a front of the engine;
a blower housing coupled to the engine block and defining a hot half positioned adjacent the front of the engine and a cool half opposite the hot half; and
an electric starting system positioned within the blower housing, the electric starting system comprising:
a starter mount assembly coupled to the blower housing;
an electric starter motor retained by the starter mount assembly and positioned in the cool half; and
a battery mounted to the blower housing and positioned in the cool half, the battery electrically coupled to the electric starter motor.

2. The engine of claim 1 , further comprising;
a crankshaft configured to rotate about a crankshaft axis; and
a piston configured to reciprocate within the cylinder along a cylinder axis;
wherein a first plane includes the crankshaft axis and is perpendicular to the cylinder axis with the hot half is arranged on the front side of the first plane and the cool half is arranged on an opposite side of the first plane.

3. The engine of claim 2 , further comprising:
an air filter assembly coupled to the engine block;
a fuel tank coupled to the engine block;
an oil dipstick assembly coupled to the engine block; and
an exhaust component coupled to the engine block,
wherein a second plane includes the cylinder axis and the crankshaft axis and is arranged perpendicular to the first plane,
wherein the blower housing further defines
an air filter quadrant defined by the first plane and the second plane and structured to be positioned adjacent the air filter assembly,
a fuel quadrant defined by the first plane and the second plane and structured to be positioned adjacent the fuel tank on an opposite side of the first plane from the air filter quadrant,
an oil quadrant defined by the first plane and the second plane and structured to be positioned adjacent the oil dipstick assembly on an opposite side of the second plane from the fuel quadrant, and
an exhaust quadrant defined by the first plane and the second plane and structured to be positioned adjacent the exhaust component on an opposite side of the first plane from the oil quadrant, and

wherein the cool half includes the fuel quadrant.

4. The engine of claim 3 , wherein the battery and the electric starter motor are located in different quadrants.

5. The engine of claim 3 , wherein the battery is positioned in the oil quadrant.

6. The engine of claim 3 , wherein the electric starter motor is located in the fuel quadrant.

7. The engine of claim 1 , wherein the starter mount assembly includes a worm bracket structured to support a worm, and a motor bracket structured to retain the electric starter motor.

8. The engine of claim 1 , further comprising a worm driven by the electric starter motor.

9. The engine of claim 1 , wherein the battery is integrated into the blower housing within an interior cavity.

10. The engine of claim 9 , wherein the battery is fastened to the blower housing with tamper resistant fasteners.

11. The engine of claim 1 , wherein the hot half of the engine is positioned toward the front of the engine.

12. An engine, comprising:
an engine block;
a blower housing coupled to the engine block, the blower housing including an exterior wall that defines an interior cavity;
an electric starter motor positioned within the interior cavity and secured to the blower housing; and
a battery positioned within the interior cavity and integrated into the blower housing.

13. The engine of claim 12 , wherein the battery includes at least one battery cell.

14. The engine of claim 13 , wherein the battery includes a battery housing and wherein the at least one battery cell is configured to removable and replaceable from the battery housing.

15. The engine of claim 12 , wherein the electric starter motor and the battery are configured to be removed with the blower housing when the blower housing is removed from the engine block.

16. The engine of claim 12 , wherein the blower housing includes a recess configured to receive the battery.

17. The engine of claim 12 , wherein the electric starter motor is not directly coupled to the engine block and the battery is not directly coupled to the engine block.

18. The engine of claim 12 , further comprising a worm positioned within the interior cavity and coupled to the blower housing and the electric starter motor, the electric starter motor configured to drive the worm.

19. The engine of claim 18 , further comprising a worm gear configured to drive a crankshaft, wherein the worm gear is configured to be turned by the worm.

20. The engine of claim 19 , further comprising a clutch configured to selectively engage and disengage the worm gear from the crankshaft.

Assignees

• Briggs & Stratton Llc

Inventors

• Meyer Mark
• Procknow David W
• Busse James Michael

Classifications

• F02N2200/044

  Starter current · CPC title

• F02D2400/06

  Small engines with electronic control, e.g. for hand held tools · CPC title

• F01P5/02 Primary

  Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers · CPC title

• F02N2300/102

  Control of the starter motor speed; Control of the engine speed during cranking · CPC title

• F02B63/02

  for hand-held tools · CPC title