Supercharger-equipped internal combustion engine for saddle-ride type vehicle

1. An internal combustion engine for a saddle-ride type vehicle, comprising:

a crankcase;

a supercharger disposed entirely behind the crankcase in a front-to-rear direction of a vehicle body; and

a throttle body and an intercooler connected in the front-to-rear direction, to an intake passage of the engine, said intake passage extending directly rearward, directly from a cylinder head, said cylinder head protruding substantially upward from the crankcase,

wherein the throttle body and the intercooler are connected in this order in the front-to-rear direction, the intercooler is configured between the throttle body on one side thereof and an air cleaner on another side thereof, the intercooler is disposed between left and right paired frames of a vehicle body frame of the vehicle body, with the left and right paired frames being oriented in the front-to-rear direction of the vehicle, the left and right paired frames extend in the front-to-rear direction of the vehicle body, center frame parts and the left and right paired frames form at least one parallelogram, in a side view, and the left and right paired frames and the center frame parts surround the supercharger and the throttle body.

2. The internal combustion engine according to claim 1 , wherein the throttle body is located downstream of the intercooler, and wherein the air cleaner is located upstream from the intercooler.

3. The internal combustion engine according to claim 1 , wherein the supercharger comprises a scrolled compressor, and is disposed behind a crankshaft of the internal combustion engine, and wherein the intercooler is disposed above the supercharger.

4. The internal combustion engine according to claim 1 , wherein the intercooler comprises an intercooler core chamber housing an intercooler core therein, and an expansion chamber, wherein said expansion chamber functions as an air chamber.

5. The internal combustion engine according to claim 4 , wherein the expansion chamber comprises:

a pressure regulating valve configured to return air from the expansion chamber to a point upstream of the supercharger when an air inlet pressure between the supercharger and throttle body meets or exceeds a predetermined value; and

a recirculation valve configured to return air from the expansion chamber to the point upstream of the supercharger upon closure of a throttle valve of the throttle body.

6. An internal combustion engine for a vehicle, comprising:

crankcase means for housing engine components therein;

supercharger means for compressing intake air, said supercharger means disposed entirely behind the crankcase means in a front-to-rear direction of a vehicle body;

throttle-body means for controlling intake air to the internal combustion engine; and

intercooler means for cooling the intake air, said throttle body means and said intercooler means connected in the front-to-rear direction, to an intake passage of the engine, wherein said intake passage extends directly rearward, directly from a cylinder head, said cylinder head protruding substantially upward from the crankcase means,

wherein the throttle body means and the intercooler means are connected in this order in the front-to-rear direction, the intercooler means is disposed between the throttle body means on one side thereof and an air cleaner means for cleaning intake air on another side thereof, the intercooler is disposed between left and right paired frames of a vehicle body frame of the vehicle body, the left and right paired frames extend in the front-to-rear direction of the vehicle body, center frame parts and the left and right paired frames form at least one parallelogram, in a side view, and the left and right paired frames and the center frame parts surround the supercharger and the throttle body.

7. The internal combustion engine according to claim 1 , wherein the throttle body and the intercooler are disposed below a saddle seat of the vehicle.

8. The internal combustion engine according to claim 6 , wherein the throttle body means is disposed downstream of the intercooler means, and wherein the air cleaner means is disposed upstream from the intercooler means.

9. The internal combustion engine according to claim 6 , wherein the supercharger means comprises scrolled compressor means for compressing the intake air, and wherein the supercharger means is disposed behind a crankshaft of the internal combustion engine, and wherein the intercooler means is disposed above the supercharger means.

10. The internal combustion engine according to claim 6 , wherein the intercooler means comprises an intercooler core chamber housing an intercooler core therein, and an expansion chamber, wherein said expansion chamber functions as an air chamber.

11. The internal combustion engine according to claim 10 , wherein the expansion chamber comprises:

pressure regulating means for regulating air pressure, said pressure regulating means also for returning air from the expansion chamber to a point upstream of the supercharger means when an air inlet pressure between the supercharger means and the throttle body means meets or exceeds a predetermined value; and

recirculation means for returning air from the expansion chamber to the point upstream of the supercharger means upon closure of a throttle valve of the throttle body.

12. The internal combustion engine according to claim 6 , wherein the throttle body means and intercooler means are disposed below a saddle seat of the vehicle.