V-twin engine assembly
AssigneeBriggs & Stratton Corporation
InventorsJacob Zuehl, Michael Pitcel
Life of this patent
Estimating the term…
Abstract
One embodiment of the invention relates to an internal combustion engine including an engine block having a first cylinder and a second cylinder, a crankshaft configured to rotate about a crankshaft axis, a flywheel coupled to the crankshaft, a throttle body, an air filter assembly, a first electric fan coupled to a first duct, and a second electric fan coupled to a second duct. The first duct is configured to direct cooling air directly over the first cylinder. The second duct is configured to direct cooling air directly over the second cylinder. The first cylinder is at least partially within the first duct. The second cylinder is at least partially within the second duct.
Claims20
An internal combustion engine comprising:
- an engine block including a first cylinder and a second cylinder;
- a crankshaft configured to rotate about a crankshaft axis;
- a flywheel coupled to the crankshaft;
- a throttle body configured to throttle incoming air to the first cylinder or the second cylinder;
- an air filter assembly configured to filter incoming air from an air intake and provide cleaned air to the throttle body;
- a first electric fan coupled to a first duct, the first duct defining a first cutout and configured to direct cooling air directly over the first cylinder, wherein the first cylinder is at least partially within the first duct and extends at least partially through the first cutout;
- and
- a second electric fan coupled to a second duct, the second duct defining a second cutout and configured to direct cooling air directly over the second cylinder, wherein the second cylinder is at least partially within the second duct and extends at least partially through the second cutout.
A mower comprising:
- a user seat;
- a first rear wheel and a second rear wheel;
- a mounting platform;
- and
- an internal combustion engine positioned on the mounting platform between the first rear wheel and the second rear wheel comprising:
- an engine block including a first cylinder and a second cylinder;
- a crankshaft configured to rotate about a crankshaft axis;
- a flywheel coupled to the crankshaft;
- a throttle body configured to throttle incoming air to the first cylinder and the second cylinder;
- an air filter assembly configured to filter incoming air from an air intake and provide cleaned air to the throttle body, wherein the air filter assembly comprises one or more filter elements each positioned within a receptacle and configured to provide two stages of filtration;
- a first duct defining a first cutout and configured to direct cooling air directly over the first cylinder, wherein the first cylinder is at least partially within the first duct and at least partially protrudes through the first cutout;
- and
- a second duct separate from the first duct and configured to direct cooling air directly over the second cylinder, the second duct defining a second cutout, wherein the second cylinder is at least partially within the second duct and at least partially protrudes through the second cutout.
An internal combustion engine comprising:
- an engine block including a first cylinder and a second cylinder;
- a crankshaft configured to rotate about a crankshaft axis;
- a flywheel coupled to the crankshaft;
- a throttle body configured to throttle incoming air to the first cylinder and the second cylinder;
- an air filter assembly configured to filter incoming air from an air intake and provide cleaned air to the throttle body, the air filter assembly positioned directly adjacent the flywheel;
- and
- a housing configured to direct cooling air over the engine block;
- a first duct configured to direct cooling air directly over the first cylinder, the first duct defining a first inlet, a first cutout, and a first flow path therebetween, the first cylinder at least partially extending through the first cutout;
- and
- a second duct configured to direct cooling air directly over the second cylinder, the second duct defining a second inlet, a second cutout, and a second flow path therebetween, the second cylinder at least partially extending through the second cutout;
- wherein the first flow path and the second flow path are fluidly separated.
Dependencies are inferred from the claim text.