Automatic compression releasing device for four-cycle engine

Patent · Tue Mar 24 00:00:00 EST 1987

OSTI ID:6879842

Yamashita, M; Takada, H; Inoue, T; Yamauchi, S

This patent describes an automatic compression releasing device for reducing the gas pressure in a combustion chamber of a four cycle engine for use in starting the four cycle engine in which intake and exhaust valves are opened and closed by reciprocating tappets by means of the rotation of a cam on a cam shaft through its rotation. The device comprises: a single moving member being disposed on a side of a gear integrated with the cam shaft in such a way as to surround the cam shaft; a tappet lifting arm being extended from the moving member to a position where it can push up a tappet in a compression stroke of the engine; two guide slots being bored in the moving member, and two pins being planted in the gear, so as to engage with the respective slots, where the engagement of the pins with the slots allows the moving member to slide independently along with the side of the gear in a predetermined direction; and in the cranking stage, a centrifugal force acting on the moving member in parallel with the rotation speed being designed not to overcome a force acting on the moving member against the centrifugal force.

• Assignee: Kawasaki Jukogyo Kabushiki Kaisha
• Patent Number(s): US 4651687
• OSTI ID: 6879842
• Resource Relation: Patent File Date: Filed date 20 Dec 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
PRESSURE REGULATORS
COMBUSTION CHAMBERS
COMPRESSION
EXHAUST SYSTEMS
GEARS
INTAKE STRUCTURES
PRESSURE CONTROL
PRESSURE DROP
ROTATION
SHAFTS
VALVES
VELOCITY
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
MACHINE PARTS
MECHANICAL STRUCTURES
MOTION
330100* - Internal Combustion Engines