Direct injection internal combustion engine of compression ignition type

Patent · Tue Jan 06 04:00:00 EST 1987

OSTI ID:6838279

Saito, A; Kozuka, K; Oshima, Y; Yamada, M; Mori, N; Sugiyama, K; Aoyama, T

This patent describes a direct injection internal combustion engine of a compression ignition type in which air is sucked into a combustion chamber and compressed by a piston, and fuel is injected directly thereinto so as to be ignited and combusted, comprising: air intake means having swirling means for swirling intake air supplied to the combustion chamber; a piston having a combustion chamber substantially in the form of a spherical cavity formed in a top portion of the piston, the cavity having walls which gradually converge towards an opening of the cavity at a top surface of the piston; a swirl injector for injecting a fuel spray having substantially the form of a hollow cone. The sprayed fuel has a velocity component in a tangential direction of a central axis of an injection port of the injector. The injection port is offset from a central axis of the cavity and is inclined with respect to the central axis of the cavity such that the fuel spray is injected in a forward direction of a swirl stream of intake air formed in the cavity, and wherein the air intake means comprises a port located offset from a central axis of a cylinder of the engine. The offset port has an intake passage, an inner side wall of the intake passage having an inclination sloping gradually toward a periphery of the cylinder as the passage approaches the cylinder. The inclined side wall is arranged such that an extension line of the inclined side wall extends within a region from an outer wall of a rod of an intake valve to a position apart from the outer wall. An outer side wall of the intake passage near a periphery of the piston is linear and smoothly connects with an arcuate side wall of the intake passage, the arcuate side wall defining a center offset toward the periphery of the cylinder with respect to a central axis of the intake valve.

• Assignee: K.K. Toyota Chuo Kenkyusho, Aichi
• Patent Number(s): US 4633830
• OSTI ID: 6838279
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
COMBUSTION CHAMBERS
COMPRESSION
CONTROL EQUIPMENT
CYLINDERS
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GAS FLOW
HEAT ENGINES
IGNITION
INCLINATION
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
PISTONS
POSITIONING
SPRAYS
VALVES
VEHICLES
VORTEX FLOW