Supercharged engine

Patent metadata

Field	Value
Publication number	US-10060337-B2
Application number	US-201514665436-A
Country	US
Kind code	B2
Filing date	Mar 23, 2015
Priority date	Mar 28, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A supercharged engine having an electrically operated water pump for supplying cooling water to an intercooler in a compact layout. The supercharged engine includes a supercharger disposed rearwardly of a cylinder assembly of the engine, a drive pulley mounted on a supercharger drive shaft of the engine, a driven pulley mounted on an input shaft of the supercharger, a drive belt trained around the drive pulley and the driven pulley, an intercooler for cooling supercharging air that is supplied from the supercharger, and an electrically operated water pump for delivering cooling water under pressure to the intercooler. The supercharged engine also includes a belt tensioner for tensioning the drive belt. The electrically operated water pump is disposed on a crankcase which is positioned more closely to the center of the engine across the width thereof in directions along a crankshaft of the engine than the belt tensioner.

First claim

What is claimed is:

1. An engine including a supercharger operatively connected to a cylinder assembly of the engine, for supplying supercharging air into a combustion chamber of said engine, a drive pulley mounted on a supercharger drive shaft of said engine, a driven pulley mounted on an input shaft of said supercharger, a drive belt trained around said drive pulley and said driven pulley, a liquid-cooled intercooler for cooling supercharging air that is supplied from said supercharger, and a coolant pump for delivering a coolant under pressure to said intercooler, the supercharged engine comprising:
a belt tensioner for tensioning said drive belt, wherein said belt tensioner is disposed in a position overlapping said cylinder assembly as viewed in a direction along the crankshaft;
an electric motor operatively connected to said coolant pump for rotating said coolant pump, said coolant pump being positioned in close proximity to the engine in a direction along a crankshaft of the engine relative to the positioning of said belt tensioner.

2. The engine according to claim 1 , wherein said electrically operated coolant pump is disposed on an upper portion of a crankcase and between said belt tensioner and said cylinder assembly.

3. The engine according to claim 1 , and further including a motor shaft of said electric motor, said motor shaft being operatively connected to said coolant pump and extending perpendicularly to said crankshaft.

4. The engine according to claim 2 , and further including a motor shaft of said electric motor, said motor shaft being operatively connected to said coolant pump and extending perpendicularly to said crankshaft.

5. The engine according to claim 1 , and further including coolant pump mount bosses having vertically extending bolt holes, said bolt holes being disposed on an upper surface of a crankcase and a side surface of said cylinder assembly, and said electrically operated coolant pump is mounted by rubber mount structures on said coolant pump mount bosses.

6. The engine according to claim 2 , and further including coolant pump mount bosses having vertically extending bolt holes, said bolt holes being disposed on an upper surface of a crankcase and a side surface of said cylinder assembly, and said electrically operated coolant pump is mounted by rubber mount structures on said coolant pump mount bosses.

7. The engine according to claim 3 , and further including coolant pump mount bosses having vertically extending bolt holes, said bolt holes being disposed on an upper surface of a crankcase and a side surface of said cylinder assembly, and said electrically operated coolant pump is mounted by rubber mount structures on said coolant pump mount bosses.

8. The engine according to claim 5 , and further including a tensioner mount boss for mounting said belt tensioner, said tensioner mount boss projecting away from the side surface of said cylinder assembly, and said coolant pump mount bosses are disposed on an upper portion of said tensioner mount boss.

9. The engine according to claim 1 , and further including a sub-radiator connected to said electrically operated coolant pump, said sub-radiator being disposed in front of said cylinder assembly with coolant pipes for interconnecting said intercooler and said electrically operated coolant pump.

10. The engine according to claim 2 , and further including a sub-radiator connected to said electrically operated coolant pump, said sub-radiator being disposed in front of said cylinder assembly with coolant pipes for interconnecting said intercooler and said electrically operated coolant pump.

11. The engine according to claim 3 , and further including a sub-radiator connected to said electrically operated coolant pump, said sub-radiator being disposed in front of said cylinder assembly with coolant pipes for interconnecting said intercooler and said electrically operated coolant pump.

12. The engine according to claim 9 , and further including coolant inlet ports disposed, respectively, on said intercooler, said electrically operated coolant pump, and said sub-radiator, and coolant outlet ports disposed, respectively, on said intercooler, said electrically operated coolant pump, and said sub-radiator extend along a plane perpendicular to said crankshaft.

13. An engine comprising:
a supercharger operatively connected to a cylinder assembly of the engine, for supplying supercharging air into a combustion chamber of said engine;
a drive pulley mounted on a supercharger drive shaft;
a driven pulley mounted on an input shaft of said supercharger;
a drive belt trained around said drive pulley and said driven pulley, said driven pulley having a belt tensioner for tensioning said drive belt, wherein said belt tensioner is disposed in a position overlapping said cylinder assembly as viewed in a direction along the crankshaft;
a liquid-cooled intercooler for cooling supercharging air supplied from said supercharger;
a coolant pump for delivering a coolant under pressure to said intercooler;
an electric motor operatively connected to said coolant pump for rotating said coolant pump, said coolant pump being positioned in close proximity to the engine in a direction along a crankshaft of the engine relative to the positioning of said belt tensioner.

14. The engine according ID claim 13 , wherein said electrically operated coolant pump is disposed on an upper portion of a crankcase and between said belt tensioner and said cylinder assembly.

15. The engine according to claim 13 , and further including a motor shaft of said electric motor, said motor shaft being operatively connected to said coolant pump and extending perpendicularly to said crankshaft.

16. The engine according to claim 13 , and further including coolant pump mount bosses having vertically extending bolt holes, said bolt holes being disposed on an upper surface of a crankcase and a side surface of said cylinder assembly, and said electrically operated coolant pump is mounted by rubber mount structures on said coolant pump mount bosses.

17. The engine according to claim 14 , and further including coolant pump mount bosses having vertically extending bolt holes, said bolt holes being disposed on an upper surface of a crankcase and a side surface of said cylinder assembly, and said electrically operated coolant pump is mounted by rubber mount structures on said coolant pump mount bosses.

18. The engine according to claim 16 , and further including a tensioner mount boss for mounting said belt tensioner, said tensioner mount boss projecting away from the side surface of said cylinder assembly, and said coolant pump mount bosses are disposed on an upper portion of said tensioner mount boss.

19. The engine according to claim 13 , and further including a sub-radiator connected to said electrically operated coolant pump, said sub-radiator being disposed in front of said cylinder assembly with coolant pipes for interconnecting said intercooler and said electrically operated coolant pump.

20. The engine according to claim 19 , and further including coolant inlet ports disposed, respectively, on said intercooler, said electrically operated coolant pump, and said sub-radiator, and coolant outlet ports disposed respectively on said intercooler, said electrically operated coolant pump, and said sub-radiator extend along a plane perpendicular to said crankshaft.

Assignees

• Honda Motor Co Ltd

Inventors

• Ohmori Kenichi
• Takiguchi Chikashi

Classifications

• F02B39/04

  Mechanical drives; Variable-gear-ratio drives (non-mechanical pump drives having variable gear ratio F02B39/08) · CPC title

• B62J37/00

  Arrangements of fuel supply lines, taps, or the like, on motor cycles or engine-assisted cycles · CPC title

• F02B29/0443 Primary

  Layout of the coolant or refrigerant circuit · CPC title

• Y02T10/146

  Cross-Sectional Technologies · mapped topic

• F02B33/34

  with rotary pumps (with cell-type pressure exchangers or the like F02B33/42) · CPC title