Component layout for engine

• US 5,542,387 A
• Filed: 08/09/1994
• Issued: 08/06/1996
• Est. Priority Date: 08/09/1994
• Status: Expired due to Term

• Current Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Original Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Inventors: Okubo, Akihiko
• Primary Examiner(s): Kamen, Noah P.
• Application Number:
  US08/287,906
• Time in Patent Office: 728 Days
• Field of Search: 180/296, 180/297, 123/184.22, 123/179.25, 123/192.2, 123/195 A, 123/196 R, 123/198 R, 123/198 C, 123/41.86
• US Class Current: 123/192.2
• CPC Class Codes: F01M 1/16 Controlling lubricant pressure or quantity rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22
• CPC Class Codes: F01M 13/04 having means for purifying air before leaving crankcase, e.g. removing oil
• CPC Class Codes: F01M 2001/123 using two or more pumps
• CPC Class Codes: F01M 3/02 with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
• CPC Class Codes: F01M 9/108 of auxiliaries
• CPC Class Codes: F01N 13/009 having two or more separate purifying devices arranged in series
• CPC Class Codes: F01N 2230/04 Catalytic converters
• CPC Class Codes: F01N 3/2882 Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices combined with absorbents or adsorbents only F01N3/0814; combined with particulate filters F01N3/035
• CPC Class Codes: F02B 1/04 with fuel-air mixture admission into cylinder
• CPC Class Codes: F02B 2075/025 two
• CPC Class Codes: F02B 2075/1812 three
• CPC Class Codes: F02B 3/06 with compression ignition compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02
• CPC Class Codes: F02B 33/04 with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase
• CPC Class Codes: F02B 75/20 with cylinders all in one line
• CPC Class Codes: F02D 13/0284 Variable control of exhaust valves only
• CPC Class Codes: F16N 2230/02 Microprocessor; Microcomputer
• CPC Class Codes: F16N 2270/30 intermittent
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A motor vehicle containing a two-cycle, crankcase compression, internal combustion engine having direct lubricating systems for supplying lubricant to the sliding surfaces of the piston and cylinder bore for each cylinder of the engine, separate pumps for delivering lubricant to the crankshaft bearings associated with each cylinder of the engine and a system for delivering lubricant to the engine for the remaining components through the induction system. The accessories for the engine including its induction and exhaust system are laid out so as to facilitate transverse front wheel drive mounting of the engine in the vehicle.

Claims

1. A motor vehicle having a body assembly defining an engine compartment at the forward end thereof, a pair of front wheels suspended from said body assembly at the front thereof, a pair of rear wheels suspended from said body assembly at the rear end thereof, a multi-cylinder, in-line, two-cycle crankcase compression, internal combustion engine supported with a crankshaft rotatable about an axis extending transversely across said engine compartment and within said engine compartment, a balancer shaft driven by said engine crankshaft and rotatable about a balancer shaft axis parallel to and beneath said crankshaft axis, said engine having a plurality of exhaust ports on the side of said engine to the front of said engine compartment, an exhaust manifold for collecting exhaust gases from said exhaust ports, and an exhaust system including an exhaust pipe extending from said exhaust manifold beneath said engine and said balancer shaft rearwardly of said body assembly for discharge of the exhaust gases from said engine to the atmosphere.

2. The motor vehicle as set forth in claim 1, wherein the engine has a cylinder block in which the cylinder bores are formed and which cylinder bores are inclined from the vertical in a forward direction.

3. The motor vehicle as set forth in claim 2, wherein the forward inclination of the engine places the balancer shaft axis to the rear of and below the crankshaft axis.

4. The motor vehicle as set forth in claim 3, wherein the crankshaft is rotatable and journalled within a crankcase chamber and further including an oil separator disposed on the rear side of the engine to the rear of the crankcase chamber.

5. The motor vehicle as set forth in claim 4, further including an air pump driven by the engine and positioned on the rear end thereof and disposed vertically above the oil separator.

6. The motor vehicle as set forth in claim 5, further including lubricating means for supplying lubricant to the air pump and drain means for draining the lubricant by gravity from the air pump to the oil separator.

7. The motor vehicle as set forth in claim 6, further including an alternator driven by the engine crankshaft and positioned on the rear side of the engine.

8. The motor vehicle as set forth in claim 7, wherein the alternator is driven from the air pump.

9. The motor vehicle as set forth in claim 8, further including a starter motor mounted on the rear side of the engine for cooperation with the crankshaft for starting of said engine.

10. The motor vehicle as set forth in claim 1, wherein the crankshaft is rotatable and journalled within a crankcase chamber and further including an oil separator disposed on the rear side of the engine to the rear of the crankcase chamber.

11. The motor vehicle as set forth in claim 10, further including an air pump driven by the engine and positioned on the rear end thereof and disposed vertically above the oil separator.

12. The motor vehicle as set forth in claim 11, further including lubricating means for supplying lubricant to the air pump and drain means for draining the lubricant by gravity from the air pump to the oil separator.

13. The motor vehicle as set forth in claim 12, further including an alternator driven by the engine crankshaft and positioned on the rear side of the engine.

14. The motor vehicle as set forth in claim 13, wherein the alternator is driven from the air pump.

15. The motor vehicle as set forth in claim 1, further including an alternator driven by the engine crankshaft and positioned on the rear side of the engine.

16. The motor vehicle as set forth in claim 15, wherein the engine has a cylinder block in which cylinder bores are formed and which cylinder bores are inclined from the vertical in a forward direction.

17. The motor vehicle as set forth in claim 1, wherein the rear side of the engine is provided with a plurality of intake ports and further including an induction system for delivering at least an air charge to said intake ports.

18. The motor vehicle as set forth in claim 17, wherein the induction system includes an air silencer disposed to the rear of the engine within the engine compartment and receiving air from a ram air inlet extending forwardly in the engine compartment over the engine and terminating at the front end of said engine compartment.

19. The motor vehicle as set forth in claim 18, further including an air pump driven by the engine and positioned on the rear side thereof.

20. The motor vehicle as set forth in claim 19, wherein the air pump draws air from the air silencer.

21. The motor vehicle as set forth in claim 20, wherein the engine has a cylinder block in which cylinder bores are formed and which cylinder bores are inclined from the vertical in a forward direction.

22. The motor vehicle as set forth in claim 21, further including a further air pump driven by the engine and wherein the first mentioned air pump supplies air to the engine for its operation and the further air pump draws air from a vacuum booster for a brake system of the vehicle.

23. The motor vehicle as set forth in claim 22, wherein the crankshaft is rotatable and journalled within a crankcase chamber and further including an oil separator disposed on the rear side of the engine to the rear of the crankcase chamber.

24. The motor vehicle as set forth in claim 23, further including means for delivering lubricant to the further air pump for its lubrication and returning its lubricant from the further air pump to the oil separator.

25. The motor vehicle as set forth in claim 24, wherein the oil separator is positioned vertically below the further air pump and the lubricant is returned to the separator by gravity.