OUTBOARD ENGINE UNIT

• US 20130019820A1
• Filed: 06/21/2012
• Published: 01/24/2013
• Est. Priority Date: 07/23/2011
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Inaba, Takeshi, Ishizaka, Kazuhiro
• Granted Patent: US 8,707,915 B2
• Time in Patent Office: Days
• US Class Current: 123/41.54
• CPC Class Codes: B63H 20/32 Housings air intakes for outboard engines F02M35/167
• CPC Class Codes: F01P 2001/005 Cooling engine rooms
• CPC Class Codes: F02M 35/1205 Flow throttling or guiding
• CPC Class Codes: F02M 35/168 with means, e.g. valves, to prevent water entry

Abstract

An exhaust fan chamber is defined with a belt cover and a fan cover provided over the belt cover, and an exhaust fan is accommodated in the exhaust fan chamber. The fan cover has an air intake port for sucking air within an engine cover into the exhaust fan chamber and an exhaust outlet port for discharging air within the exhaust fan chamber to outside of the exhaust fan chamber. The exhaust outlet port is in communication with an exhaust opening formed in an upper portion of the engine cover so that the air discharged through the exhaust outlet port is discharged to outside of the engine cover through the exhaust opening.

Claims

1. An outboard engine unit comprising:

an engine cover covering an engine, a drive belt for driving engine accessories being provided within the engine cover;

a belt cover covering an upper portion of the drive belt; and

an exhaust fan chamber defined with the belt cover and a fan cover provided over the belt cover, the exhaust fan chamber being partitioned off from an interior of the engine cover, an exhaust fan being accommodated in the exhaust fan chamber,

the fan cover having an air intake port for sucking air within the engine cover into the exhaust fan chamber and an exhaust outlet port for discharging air within the exhaust fan chamber to outside of the exhaust fan chamber,

the exhaust outlet port being in communication with an exhaust opening formed in an upper portion of the engine cover so that the air discharged out of the exhaust fan chamber through the exhaust outlet port is discharged to outside of the engine cover through the exhaust opening.

2. The outboard engine unit according to claim 1, wherein the exhaust outlet port and the exhaust opening are in communication with each other via an exhaust passageway provided in an upper portion of the engine cover.

3. The outboard engine unit according to claim 1, wherein the fan cover has a height difference such that the exhaust fan chamber has a generally scroll shape.