Unit injector of an internal combustion engine

Patent · Tue Jan 21 04:00:00 EST 1986

OSTI ID:5902079

Taniguchi, H; Tsukahara, H

This patent describes a fuel injector which is to be utilized in an internal combustion engine. Described in detail in the patent is a plunger which is adapted to be reciprocated in order to effect the pressurizing of a supplied fuel as well as a barrel configured to receive the plunger. An injector body component of the injector apparatus characterized in detail is indicated as housing a number of member parts structurally configured in a way crucial to the functioning of the patent device. The first parts housed in this body are a plunger and its associated barrel. The next part so housed is a nozzle valve which is adapted to inject pressurized fuel into the engine. Closely associated with these aforementioned two components is a check valve which is located between them physically. The injector body is further characterized as being of cylindrical shape and containing an upper bore and a lower bore that are separated by a partition and which open on the upper and lower sides of the body. The upper bore is detailed as being adapted in such a way as to define a chamber for receiving a plunger spring and a bore element to receive the plunger barrel. Similarly, the lower bore is designed such that it defines a nozzle spring chamber. Consequently, as the patent discusses, when the nozzle spring, nozzle body and nozzle valve are assembled into the unit they are inserted into the lower bore from the lower side of the injector body and mechanically secured in place. Likewise, the check valve, the plunger and its associated barrel and the plunger spring are inserted into the upper bore from the upper side of the injector body and secured in place by means of a barrel holder screwed into an internally threaded portion formed in the upper bore.

• Assignee: Yanmar Diesel Engine Co., Ltd., Osaka
• Patent Number(s): US 4565320
• OSTI ID: 5902079
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTAINERS
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
FASTENERS
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INCIDENCE ANGLE
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
NOZZLES
OPENINGS
POSITIONING
PRESSURIZING
SPACE DEPENDENCE
SPRINGS
TESTING
VALVES
WALLS