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公开(公告)号：JP2003020917A
公开(公告)日：2003-01-24
申请号：JP2001205231
申请日：2001-07-05
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： ITO TOSHIO
CPC classification number: F02B23/0696 , F02B23/0621 , F02F2001/247 , Y02T10/125
Abstract: PROBLEM TO BE SOLVED: To provide a technology in which a pressure ratio is reduced without increasing a size of an internal combustion engine.
SOLUTION: This internal combustion engine 1 comprises: a cylinder head 1a; a piston 7; a cylinder 8; an intake valve 4; an exhaust valve 5; and a combustion chamber 7a. In the internal combustion engine 1, the intake valve 4 and/or the exhaust valve 5 are provided with a shade part 41 having a bottom surface 43 opposite to the piston 7, and a shaft part 42. A hollow part 44 is formed inside the intake valve 4 and/or the exhaust valve 5, and an opening part 45 which makes the combustion chamber 7a and the hollow part 44 communicate with each other is formed to a part of the bottom surface 43 of the shade part.
COPYRIGHT: (C)2003,JPOAbstract translation: 要解决的问题：提供一种在不增加内燃机的尺寸的情况下降低压力比的技术。 解决方案：该内燃机1包括：气缸盖1a; 活塞7; 气缸8; 进气阀4; 排气阀5; 和燃烧室7a。 在内燃机1中，进气门4和/或排气门5设置有具有与活塞7相对的底面43的遮光部41和轴部42.中空部44形成在内部 进气阀4和/或排气阀5以及使燃烧室7a和中空部44相互连通的开口部45形成在遮光部的底面43的一部分。
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公开(公告)号：JP2000213646A
公开(公告)日：2000-08-02
申请号：JP2026999
申请日：1999-01-28
Applicant: TOYOTA MOTOR CORP
Inventor： ITO TOSHIO
Abstract: PROBLEM TO BE SOLVED: To prevent a piston from turning around an axial line in operation by arranging a connection part of the piston and a connection rod in an eccentric position in the piston radial direction from the piston central axis in a motion plane for the connection rod. SOLUTION: A connection part 6 of a piston 2 and a connection rod 6 is arranged in the position deflected by δ in the piston 2 radial direction from the piston 2 central axial line on a motion plane for the connection rod 5. In the connection rod 5 connected to a crank shaft 3 immovably in the crank axial direction, the connection part 6 is arranged in an eccentric position. In this way, the piston 2 can be prevented from turning without using any separate rotation stopping member for stopping rotation of the piston around the axial line.
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公开(公告)号：JPH10299440A
公开(公告)日：1998-11-10
申请号：JP10894397
申请日：1997-04-25
Applicant: TOYOTA MOTOR CORP
Inventor： ITO TOSHIO
Abstract: PROBLEM TO BE SOLVED: To accurately regulate the timing of a valve even during the low temperature starting of an internal combustion engine without arranging a heating means by which the increase of a cost and the increase of the size of a device are used and improve responsiveness to regulation of a valve timing. SOLUTION: A valve characteristic control device for an internal combustion engine comprises a valve timing regulating device 1 operated by a hydraulic oil pressure and varying the opening closing characteristics of an intake valve or an exhaust valve according to an engine operation state; and an oil warmer passage 10 formed in a crank shaft journal part. The oil warmer passage 10 forms a part of an oil pressure passage running from an oil pan 5 to a valve timing regulating device 1. Since hydraulic oil is heated in the oil warmer passage 10 by the slide heat of a crank shaft, by reducing viscosity of the hydraulic oil even during the low temperature starting of an internal combustion engine, the valve timing regulating device 1 is accurately operated.
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公开(公告)号：JPH1047152A
公开(公告)日：1998-02-17
申请号：JP20035696
申请日：1996-07-30
Applicant: TOYOTA MOTOR CORP
Inventor： ITO TOSHIO
Abstract: PROBLEM TO BE SOLVED: To make face pressure between a cylinder head and a cylinder bore uniform in the case of pulling up a lower deck by a head bolt in an open deck type cylinder block. SOLUTION: In an open deck type cylinder block where a cylinder bore 2 and a cylinder block outside wall 9 are mutually separated in its upper part, a first rib 8 to connect the lower part of a head bolt boss 11 provided on the cylinder block outside wall 9 with a lower deck 6 just under the above lower part and a second rib 5 to connect the first rib 8 with the lower deck 6 positioned at a center between the adjacent head bolt bosses 11 are provided. Consequently, since the lower deck 6 just under the head bolt boss part 11 is pulled up by the first rib 8 in the case of fastening of a head bolt, and the lower deck 6 located at a center between the head bolt bosses is pulled up by the second rib 5, the lower deck 6 is therefore uniformly pulled up, and face pressure caused as the reactive force of the above pulling up power between the cylinder head and the cylinder bore 2 becomes uniform.
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公开(公告)号：JPH04234526A
公开(公告)日：1992-08-24
申请号：JP11691
申请日：1991-01-07
Applicant: TOYOTA MOTOR CORP
Inventor： KANAMARU MASANOBU , YASUDA YUJIRO , ITO TOSHIO , MASUBUCHI MASAHIKO
Abstract: PURPOSE:To ensure good combustion while reducing pumping loss in a 4-cycle internal combustion engine. CONSTITUTION:Exhaust valves 7 and 8 are opened until the middle period of an intake stroke, and an exhaust gas is made to flow backward into a combustion chamber 4 in the first half of the intake stroke. One side exhaust passage 10 is extended in a tangent line to the peripheral wall surface of the combustion chamber 4, an exhaust control valve 22 is provided in the other side exhaust passage 9, and the exhaust control valve 22 is closed at the time of a low load or an engine low-temperature. Closing the exhaust control valve 22 causes turning a back flow exhaust gas around a cylinder shaft line in the combustion chamber 4, gathering an exhaust gas Y on a piston 2 top face in the latter half of an intake stroke, and gathering an air-fuel mixture Z on the upper part of the combustion chamber 4. The exhaust control valve 22 is fully opened at the time of a high load or of a high load in an engine high- temperature. At that time, much exhaust gas flows reversely, and this reduces pumping loss.
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Patent Agency Ranking
公开(公告)号：JPH03105059A
公开(公告)日：1991-05-01
申请号：JP24015389
申请日：1989-09-18
Applicant: TOYOTA MOTOR CORP
Inventor： TANAHASHI TOSHIO , NAKAMURA NORIHIKO , ITO TOSHIO , KANAMARU MASANOBU
Abstract: PURPOSE:To shorten the fuel injection time by installing the first fuel injection valve which directly jets fuel into a cylinder and the second fuel injection valve which jets fuel into an air feeding passage and jetting fuel from the both fuel injection valves when the fuel injection quantity exceeds a prescribed fuel injection quantity. CONSTITUTION:As for a two-cycle internal combustion engine having an air feeding port 9 and an exhaust port 10 on a cylinder head 10, an inside cylinder fuel injection valve 17 is installed onto the peripheral part of the inner wall surface part 3a of the cylinder head below an air feeding valve 5 for opening/ closing the air feeding port 9 so that a nozzle port 18 is set close to a combustion chamber 4. Further, the rod-shaped fuel having a small spread angle is jetted into the air feeding port 9, and a port injection valve 20, which forms fine particulate fuel through the collision with the bevel part of the air feeding valve 5, onto the air feeding port 9. When the fuel injection quantity is less than a previously determined fuel injection quantity, fuel is jetted from the inside cylinder fuel injection valve 17, while it the fuel injection quantity exceeds a previously determined fuel injection quantity, fuel is jetted from both the fuel injection valves 17 and 30.
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公开(公告)号：JPH02230963A
公开(公告)日：1990-09-13
申请号：JP5016089
申请日：1989-03-03
Applicant: TOYOTA MOTOR CORP
Inventor： TANAHASHI TOSHIO , NAKAMURA NORIHIKO , KANAMARU MASANOBU , ITO TOSHIO , ITO KAZUHIRO , UMEHANA TOYOICHI , HIROSE KATSUHIKO , NIHEI HIROAKI
Abstract: PURPOSE:To ignite and burn a mixture immediately after an engine is started by repeating the cycle in which fuel is fed but not ignited and the cycle in which fuel is fed and ignited for predetermined cycles when the engine is operated with a low load. CONSTITUTION:When an engine is operated with a low load, first the fuel and compressed air are injected through an air blast valve 30 and a fuel injection valve 36, then the ignition by an ignition plug 10 is stopped, the mixture is once compressed in a cylinder 1, it is strongly mixed with the high- temperature remaining burnt gas, gasification is accelerated by the temperature rise due to a compression action, the time before ignition is extended, thus the mixture is set to the state to be easily ignited and burned. The fuel and compressed air are again injected through the air blast valve 30 and fuel injection valve 36 in the next cycle and ignited by the ignition plug 10. The mixture can be ignited and burned immediately after the engine is started even when the engine is operated with a low load.
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公开(公告)号：JPH02125916A
公开(公告)日：1990-05-14
申请号：JP27932088
申请日：1988-11-07
Applicant: TOYOTA MOTOR CORP
Inventor： KANAMARU MASANOBU , NAKAMURA NORIHIKO , TANAHASHI TOSHIO , ITO TOSHIO , ITO KAZUHIRO
Abstract: PURPOSE:To lower the position of the whole of new air inside a combustion chamber, so that strong loop scavenging may be ensured so as to improve a scavenging effect, by forming a new air guide wall on the inner wall surface of an air feed port outlet provided on the exhaust valve side, and extending the top end edge and the top end region of the guide wall in the respective specific directions. CONSTITUTION:A projection part 20 extending from the inner wall surface of an air feed port outlet part 8a provided on an exhaust valve 7 side toward an air feed valve stem 6a is formed integratedly on the inner wall surface. The top edge 21 of the projection part 20 extends along the diameter of the air feed port outlet part 8a in the right direction in relation to a line for joining an air feed valve 6 provided in vicinity of the exhaust valve 7 to the exhaust valve 7. Further, the upper wall surface 24 of the projection part 20, namely, a new air guide wall extends diagonally in relation to the axial line of the air feed valve stem 6a from the inner wall surface of the air feed port outlet part 8a toward the top edge 21 of the projection part 20. In addition, the new air guide wall 24 is formed nearly in a plate shape and extended toward the opening of the air feed valve 6 provided on the opposite side to the exhaust valve 7. Thereby, the whole of new air A and B is lowered inside a combustion chamber 4 so as to generate strong loop scavenging C.
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公开(公告)号：JPH01130011A
公开(公告)日：1989-05-23
申请号：JP28838987
申请日：1987-11-17
Applicant: TOYOTA MOTOR CORP
Inventor： TANAHASHI TOSHIO , ITO TOSHIO , KANAMARU MASANOBU , ITO KAZUHIRO
Abstract: PURPOSE:To improve the output of an engine by closing an opening between the peripheral edge of an intake valve located at the exhaust valve side and a valve seat with a mask wall extending toward a combustion chamber from the inner wall surface of a cylinder over the whole period of opening the intake valve. CONSTITUTION:A mask wall 8a is provided which extends from the inner wall surface 3a of a cylinder toward a combustion chamber. The mask wall 8a is provided on one and the other sides respectively with a pair of intake valves 6 and a pair of exhaust valves 7. An opening between the peripheral edge of intake valve 6 located on the exhaust valve 7 side and a valve seat 9 is closed over the whole period of opening the intake valve 6. Thus, new charge is guided to descend along the inner wall surface of cylinder so that satisfactory loop scavenging can be ensured to improve the output of engine.
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公开(公告)号：JPS63205415A
公开(公告)日：1988-08-24
申请号：JP3581987
申请日：1987-02-20
Applicant: TOYOTA MOTOR CORP
Inventor： TANAHASHI TOSHIO , ITO TOSHIO , KANAMARU MASANOBU , NAKAMURA NORIHIKO
Abstract: PURPOSE:To improve the combustivity by specifying the valve timing, as well as furnishing a means to make a part of the exhaust gas reflow in to a combustion chamber while swirling around the cylinder shaft, in an engine in which suction valves and exhaust valves are arranged at a cylinder head. CONSTITUTION:When a six-cylinder engine is used, two suction valves 24 and two exhaust valves 26 are furnished at a cylinder head 14 of each cylinder respectively. One of two exhaust ports 22 is formed in almost a straight line to the branch pipe 50a of an exhaust maniford 50, opened in the tangent direction at a combustion chamber 18, while the other exhaust port 22 is formed making an angle. And when the exhaust gas is released and a part of it is made reflow in to the combustion chamber 18, it reflows in through the exhaust port 22 formed almost in a straight line by the effect of inertia, and a swirl S can be formed in the combustion chamber 18. Further more, the valve timing is set to open the exhaust valves 26 of the other cylinder, in the period from the closing of the suction valves 24 to the closing of the exhaust valves 26 of one cylinder.
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