Internal-combustion engines – Combustion chamber means having fuel injection only – Injection of fuel onto igniter – deflector – heater – or atomizer
Utility Patent
1998-12-15
2001-01-02
Solis, Erick (Department: 3747)
Internal-combustion engines
Combustion chamber means having fuel injection only
Injection of fuel onto igniter, deflector, heater, or atomizer
C123S305000
Utility Patent
active
06167864
ABSTRACT:
BACKGROUND OF THE INVENTION
a) Field of the Invention
The present invention relates to an arrangement for a spark-igniting direct-injection internal combustion engine and, more particularly, relates to a technical improvement in a lay-out of a fuel combustion/injection system in the spark-igniting direct-injection internal combustion engine (including a spark plug, a fuel injection valve, an intake port(s), an intake valve(s), and a piston cavity).
b) Description of the Related Art
Each of two Japanese Patent Application First Publications No. Showa 62-191622 published on Aug. 22, 1987, Heisei 2-169834 published on Jun. 29, 1990, exemplifies an internal combustion engine (so-called, a spark-igniting direct-injection internal combustion engine) in which a given amount of fuel is uninterruptedly or directly injected into a combustion chamber of each engine cylinder and the given amount of fuel is normally injected during a suction stroke of each corresponding cylinder to perform a combustion of injected fuel (homogeneous combustion) with a homogeneous air mixture fuel (a state in which the injected fuel is dispersed uniformly within a whole combustion chamber).
In addition, when the engine falls in a predetermined driving condition (for example, in a state where an engine speed is low and an engine load is low), the fuel is injected during a compression stroke of the corresponding cylinder to form a stratified air mixture fuel having a first layer including the air mixture fuel of a combustible air mixture fuel within the combustion chamber and ignitable by means of a corresponding spark plug and a second layer having the combustible air mixture fuel receiving a combustion flame from the first layer although the ignition through an aerial layer including EGR (Exhaust Gas Recirculation) or the corresponding spark plug is difficult.
Hence, it becomes possible to perform a combustion (stratified combustion) at an extremely thin air-fuel mixture ratio (air-fuel mixture ratio (an air fuel mixture ratio placed in a vicinity to a lean limit) so that an improvement in a fuel consumption due to a reduction in a pumping loss has been made.
On the other hand, each of three Japanese Patent Application First Publications No. Heisei 6-101482 published on Apr. 12, 1994, No. Heisei 7-19054 published on Jan. 20, 1995, and No. Heisei 9-79081 published on Mar. 25, 1997 exemplifies a previously proposed system lay-out of a fuel combustion/injection system (the fuel combustion/injection system includes the spark plug, the fuel injection valve, the intake port, and the piston cavity of the engine) of the spark-igniting direct-injection internal combustion engine.
SUMMARY OF THE INVENTION
However, in each of the above-described Japanese Patent Application First Publications, no detailed discussion on the system lay-out of the fuel combustion/injection system of the spark-igniting direct-injection internal combustion engine is taken into consideration, the spark-igniting direct-injection internal combustion engine being arranged so that the intake port such that an intake air is introduced through a side surface of a cylinder head and the introduced intake air is further introduced into the corresponding combustion chamber from an upper surface of the combustion chamber located so as to face toward a lower surface of the cylinder head is provided and an injection nozzle of the fuel injection valve is disposed on a peripheral edge portion of the combustion chamber rather than an opening end portion of the corresponding combustion chamber of the intake port.
It is necessary to design the system lay-out of the fuel combustion/injection system with a difference in a combustion mode taken into consideration so that both of a combustion characteristic and an engine driveability in both combustion modes of homogeneous combustion and stratified combustion can be satisfied since the combustion modes in the homogeneous combustion and the stratified combustion are different when the engine is driven with the homogeneous combustion and stratified combustion switched.
It is, thus, an object of the present invention to provide an optimum system lay-out of the fuel combustion/injection system in the spark-igniting direct-injection internal combustion engine as an optimum arrangement for the spark-igniting direct-injection internal combustion engine in which the intake port such that an intake air is introduced through the side surface of the cylinder head and the introduced intake air is further introduced into the corresponding combustion chamber from the upper surface of the combustion chamber located so as to face toward the lower surface of the cylinder head is provided and the injection nozzle of the fuel injection valve is disposed on a peripheral edge portion of the combustion chamber rather than an opening end portion of the corresponding combustion chamber of the intake port.
According to one aspect of the present invention, there is provided with a spark-igniting direct-injection internal combustion engine, comprising: at least one cylinder having a bore diameter B; and a fuel injection valve disposed on a peripheral edge of a closed end of the cylinder and including an injection nozzle faced toward an inner part of the cylinder and through which a given amount of fuel is injected into the inner part of the cylinder, and wherein X/B ranges from 0.38 to 0.46, wherein X denotes a distance from the injection nozzle of the fuel injection valve up to a center axial line of the cylinder.
According to another aspect of the present invention, there is provided with a spark-igniting direct-injection internal combustion engine, comprising: at least one cylinder having a bore diameter B; a spark plug installed on a predetermined part of a closed end of the cylinder; and a fuel injection valve disposed on a peripheral edge of the closed end of the cylinder and including an injection nozzle faced toward an inner part of the cylinder and through which a given amount of fuel is injected into the inner part of the cylinder, and wherein Y/B ranges from 0.4 to 0.5, wherein Y denotes a distance from a line passing through a spark-ignition portion of the ignition plug and which is parallel to a center axial line of the cylinder up to the injection nozzle of the fuel injection valve.
According to a still another aspect of the present invention, there is provided with a spark-igniting direct-injection internal combustion engine, comprising: at least one cylinder having a bore diameter B; at least one intake valve disposed on a predetermined part of the closed end of the cylinder; and a fuel injection valve disposed on a peripheral edge of the closed end of the cylinder and including an injection nozzle faced toward an inner part of the cylinder and through which a given amount of fuel is injected into the inner part of the cylinder, and wherein Z/B ranges from 0.2 to 0.3, wherein Z denotes a distance from the nozzle up to a center of the intake valve.
This summary of the invention does not necessarily describe all necessary features so that the invention may also be a sub-combination of these described features.
REFERENCES:
patent: 3908624 (1975-09-01), Miyake et al.
patent: 4492194 (1985-01-01), Chmela et al.
patent: 4721081 (1988-01-01), Krauja et al.
patent: 4958604 (1990-09-01), Hashimoto
patent: 5327864 (1994-07-01), Regueiro
patent: 5642706 (1997-07-01), Wirth et al.
patent: 5720753 (1998-02-01), Matoba et al.
patent: 5740777 (1998-04-01), Yamamoto et al.
patent: 5775288 (1998-07-01), Suzuki et al.
patent: 5943993 (1999-08-01), Carstensen et al.
patent: 6019079 (2000-02-01), Sakurahara et al.
patent: 6065444 (2000-05-01), Jingu et al.
patent: 0 454 117 (1991-10-01), None
patent: 496 029 (1992-07-01), None
patent: 0 558 072 (1993-09-01), None
patent: 62-191622 (1987-08-01), None
patent: 2-169834 (1990-06-01), None
patent: 6-101482 (1994-04-01), None
patent: 7-19054 (1995-01-01), None
patent: 9-79081 (1997-03-01), None
Jingu Nobuhisa
Nomura Tadashi
Foley & Lardner
Nissan Motor Co,. Ltd.
Solis Erick
LandOfFree
Arrangement for spark-igniting direct-injection internal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arrangement for spark-igniting direct-injection internal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for spark-igniting direct-injection internal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2464686