Patent ID: 11904971
Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A straddled vehicle comprising:
a body frame;
an engine unit supported by the body frame, the engine unit being a single-cylinder engine or a parallel multicylinder engine; and
a front wheel that is positioned more frontward, in a forward-backward direction of the straddled vehicle, than the engine unit in a side view of the straddled vehicle, wherein
the engine unit includes:
an engine body having a cylinder axis that tilts forward from an upward-downward direction of the straddled vehicle at an angle of 45 degrees or less;
a radiator, including a radiator core, that cools a coolant for cooling the engine body;
a turbocharger, including:
a turbine wheel that is rotatable by exhaust air from the engine body, and
a compressor wheel that is connected to the turbine wheel and that rotates together with the turbine wheel, the turbocharger compressing intake air thereof by the rotation of the compressor wheel; and

an intercooler, including an intercooler core, that cools the intake air compressed by the turbocharger,

at least a part of the intercooler, at least a part of the turbine wheel, and at least a part of the radiator core being positioned within a space between the forward-tilted engine body and the front wheel;
the straddled vehicle has
an engine-body upper end that is an upper end of the engine body in the upward-downward direction of the straddled vehicle,
an engine-body lower end that is a lower end of the engine body in the upward-downward direction of the straddled vehicle,
a wheel upper point that is an upper point of the front wheel in the upward-downward direction of the straddled vehicle,
a wheel lower point that is a lower point of the front wheel in the upward-downward direction of the straddled vehicle,
a first connecting line that is a straight line passing through the engine-body upper end and the wheel upper point,
a second connecting line that is a straight line passing through the engine-body lower end and the wheel lower point,
a third connecting line that is a straight line passing through the engine-body upper end and the engine-body lower end,
a fourth connecting line that is a straight line passing through the wheel upper point and the wheel lower point,
an engine-body front-surface that is a part of an outside edge of the engine body that is more frontward than the third connecting line, and
a wheel rear-surface that is a part of an outside edge of the front wheel that is more backward than the fourth connecting line, wherein
in the side view of the straddled vehicle, at least a part of the intercooler core, at least a part of the turbine wheel and at least a part of the radiator core are all within an area enclosed by the first connecting line, the second connecting line, the engine-body front-surface, and the wheel rear-surface;

the straddled vehicle further has
an intercooler-core upper end that is an upper end of the intercooler core in an upward-downward direction of the cylinder axis, which is a direction in which the cylinder axis extends, and
a turbine-wheel upper end that is an upper end of the turbine wheel in the upward-downward direction of the cylinder axis, wherein
the entire intercooler-core upper end is positioned more upward than the turbine-wheel upper end in the upward-downward direction of the cylinder axis;

the straddled vehicle further has
an intercooler-core front end that is a front end of the intercooler core in a forward-backward direction of the cylinder axis, which is perpendicular to the upward-downward direction of the cylinder axis, and
a turbine-wheel front end that is a front end of the turbine wheel in the forward-backward direction of the cylinder axis, wherein
the entire intercooler-core front end is positioned more frontward than the turbine-wheel front end in the forward-backward direction of the cylinder axis;

the straddled vehicle further has
an intercooler-core lower end that is a lower end of the intercooler core in the upward-downward direction of the cylinder axis, and
a radiator-core upper end that is an upper end of the radiator core in the upward-downward direction of the cylinder axis, wherein
the entire intercooler-core lower end is positioned more upward than the radiator-core upper end in the upward-downward direction of the cylinder axis; and

the straddled vehicle further has
a radiator-core rear end that is a rear end of the radiator core in the forward-backward direction of the cylinder axis,
a turbine-wheel rear end that is a rear end of the turbine wheel in the forward-backward direction of the cylinder axis, and
an intercooler-core rear end that is a rear end of the intercooler core in the forward-backward direction of the cylinder axis, wherein
the entire radiator-core rear end is positioned more frontward than both the turbine-wheel rear end and the intercooler-core rear end in the forward-backward direction of the cylinder axis.