Air-cooled overhead-valve engine

Patent · Tue Jun 16 00:00:00 EDT 1987

OSTI ID:6169509

Shirai, T

This patent describes an air-cooled overhead-valve internal combustion engine. The engine is composed of a crankcase with a crankshaft, a cylinder block with a cylinder head and a combustion chamber mounted in the crankcase. At least a pair of intake and exhaust valves installed in intake and exhaust ports are formed in the cylinder head. A valve drive system mounted adjacent to the cylinder block drives the intake and exhaust valves through cam-driven push rods. An intake pipe is connected at one end of the intake port and at its opposite end to an air cleaner and a carburetor. An exhaust duct is connected at one end of the exhaust port. A flywheel is joined to the crankshaft at the other end of the output side end of the crankshaft and a cooling fan mounted on the flywheel. The improvements are where the cooling fan is housed, together with the crankcase and flywheel, in a fan casing having a pair of inlet and outlet openings bored in opposite walls. The inlet opening is located at the flywheel side of the crankshaft, while the outlet opening is located at the opposite side of the crankshaft from the flywheel. The cam-driven push rods are located in the crankcase on that side of the cylinder block far remote from where the intake pipe is connected to the intake port. The cooling fan is mounted in the fan casing in such a manner that the cooling air from the cooling fan is allowed to flow in a direction substantially parallel with the axis of the crankshaft, along the surface of the cylinder block and cylinder head.

• Assignee: Kawasaki Jukogyo Kabushiki Kaisha, Kobe
• Patent Number(s): US 4672922
• OSTI ID: 6169509
• Resource Relation: Patent File Date: Filed date 11 Mar 1986
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
COOLING SYSTEMS
DESIGN
VALVES
VEHICLES
AIR FLOW
BLOWERS
CARBURETORS
CYLINDERS
DUCTS
EXHAUST SYSTEMS
INTAKE STRUCTURES
OPERATION
PIPES
SHAFTS
CONTROL EQUIPMENT
ENERGY SYSTEMS
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL SYSTEMS
GAS FLOW
HEAT ENGINES
MACHINE PARTS
MECHANICAL STRUCTURES
330100* - Internal Combustion Engines