Claims
- 1. A cylinder block comprising a mounting surface having therein a crankcase cavity, and first and second cylinders respectively extending from said crankcase cavity in acute angular relation to each other and respectively including first and second cylinder walls respectively including first and second outer ends having respective first and second cylinder head mounting surfaces, and first and second mixture transfer ports, one of said first and second cylinder walls including a mixture supply port, first and second mixture supply passages respectively extending between said mounting surface and said first and second cylinder head mounting surfaces and respectively including first and second reed valves, a branch passage communicating between said mixture transfer port in said one of said cylinder walls and the corresponding one of said mixture supply passages at a location between the corresponding one of said first and second cylinder head mounting surfaces and the corresponding one of said first and second reed valves, and an auxiliary supply passage extending from said mounting surface and communicating with said mixture supply port in said one of said first and second cylinder walls.
- 2. A cylinder block comprising a mounting surface having therein a crankcase cavity, and first and second cylinders respectively extending from said crankcase cavity in acute angular relation to each other and respectively including first and second cylinder walls respectively including first and second outer ends having respective first and second cylinder head mounting surfaces, first and second mixture transfer ports, first and second mixture supply ports, and first and second exhaust gas discharge ports, a main exhaust gas discharge passage, a passage communicating between said first and second exhaust gas discharge ports and with said main exhaust gas discharge passage, first and second mixture supply passages respectively extending between said mounting surface and said first and second cylinder head mounting surfaces and respectively including first and second reed valves, first and second branch passages respectively communicating between said first and second mixture transfer ports in said cylinder walls and said first and second mixture supply passages at respective locations between said first and second cylinder head mounting surfaces and said first and second reed valves, and first and second auxiliary supply passages respectively extending from said mounting surface and communicating with said first and second mixture supply ports in said cylinder walls.
- 3. A cylinder block in accordance with claim 2 wherein said first and second mixture supply ports and said first and second mixture transfer ports are respectfully located in angularly spaced relation to each other and in axially spaced relation to each other.
Parent Case Info
This is a divisional of application Ser. No. 08/610,553 filed on Mar. 6, 1996, now U.S. Pat. No. 5,738,051.
US Referenced Citations (7)
Divisions (1)
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Number |
Date |
Country |
Parent |
610553 |
Mar 1996 |
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