专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

JP2004316456A Two cycle internal combustion engine 审中-公开
公开(公告)号：JP2004316456A
公开(公告)日：2004-11-11
申请号：JP2003107983
申请日：2003-04-11
申请人： Daihatsu Motor Co Ltd , ダイハツ工業株式会社
发明人： OGAWA TADAO
IPC分类号： F02B25/04
CPC分类号： Y02T10/146
摘要： PROBLEM TO BE SOLVED: To improve efficiency of scavenging air by reducing reverse flow of exhaust gas to a scavenging air port side in a two cycle internal combustion engine constructed to communicate an exhaust port 8 to a cylinder first when a piston 5 in the cylinder 3 approaches vicinity of bottom dead center and then opening a scavenging air port 6.
SOLUTION: This engine is provided with a temperature sensor 11, an oxygen concentration sensor or an exhaust gas sensor at the scavenging air port 6 and reverse flow of exhaust gas is detected. Difference between pressure in the cylinder and pressure of intake air is reduced by advancing timing of opening an exhaust valve 9 in an exhaust port, increasing pressure of intake air in the scavenging air port or reducing pressure in the cylinder according to the exhaust gas reverse flow detection.
COPYRIGHT: (C)2005,JPO&NCIPI

22. 发明专利

JPH0868357A SCAVENGING DEVICE FOR TWO-CYCLE ENGINE 失效
公开(公告)号：JPH0868357A
公开(公告)日：1996-03-12
申请号：JP26978494
申请日：1994-11-02
申请人： DAIHATSU MOTOR CO LTD
发明人： HORI NAOHITO , OGAWA TADAO , KURIYAMA TOSHIHIKO
IPC分类号： F02F1/00 , F02B25/04 , F02B75/02 , F02F1/22
摘要： PURPOSE: To reliably generate a swirl by the cylinders of a multicylinder two-cycle engine and to improve scavenging efficiency. CONSTITUTION: Fresh air is introduced in a cylinder 3 from a scavenging chamber 5 through a plurality of scavenging holes 8 formed in a cylinder liner 7. One side wall of the scavenging hole 8 consists of an outer wall surface inclined in the same direction as the direction of a tangential line based on an axis in a radial direction extending through the center of a pore and a swirl is reliably formed. In a part of the scavenging holes 8a where the direction of a scavenging flow is widely deviated from the inclination direction of a side wall, an in side wall is cut by a surface 18 extending approximately along a radial direction from the inner peripheral edge thereof to increase the effective opening area of the scavenging hole 8a. Further, in all the scavenging holes 8, the other wall may consist of a wall surface extending approximately along a radial direction or a wall surface inclined in a reverse direction.

23. 发明专利

JP2002021569A FUEL CYLINDER INJECTION TYPE INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2002021569A
公开(公告)日：2002-01-23
申请号：JP2000202630
申请日：2000-07-04
申请人： DAIHATSU MOTOR CO LTD
发明人： OGAWA TADAO , KURACHI KATSUMASA
IPC分类号： F02B23/10 , F02B75/12 , F02D41/02 , F02D41/04 , F02F1/24 , F02M61/14 , F02M61/18
摘要： PROBLEM TO BE SOLVED: To enhance vaporizability/miscibility of injected fuel in fuel cylinder injection type internal combustion engine wherein an injector 12 constituted to inject the fuel conically into a combustion chamber 5 is attached to a cylinder heat 4 to face a nozzle part 12a of the injector to an inside of an injection through hole 11 opened in an inside of the combustion chamber. SOLUTION: A conical angle for the fuel injection from the nozzle part 12a of the injector 12 is set to θ1, and the fuel in an outer circumference of a circular cone shape out of the injected fuel is set to strike a portion near to an opening part to the combustion chamber 5 out of an inner face of the injection through hole 11.

24. 发明专利

JPH07109927A SCAVENGING DEVICE IN TWO-CYCLE INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH07109927A
公开(公告)日：1995-04-25
申请号：JP25666493
申请日：1993-10-14
申请人： DAIHATSU MOTOR CO LTD
发明人： NISHIKAWA KAZUNORI , OGAWA TADAO , HORI NAOHITO
IPC分类号： F02B25/16 , F02B75/02
摘要： PURPOSE:To improve the scavenging efficiency and the ignitability of a spark plug by setting the blowing-up angles of a set of right and left, third scavenging ports at the same as or less than the blowing-up angle of a first scavenging port, and setting the blowing angles of the third scavenging ports larger than the blowing angles of a set of right and left, second scavenging ports. CONSTITUTION:On the inside surface of a cylinder 1, on the center of the top part of which a sparking plug 3 is arranged, and in the inside of which a piston 2 slides, an exhaust port 4 is opened laterally. On the opposite side of the exhaust port 4, a first scavenging port 6 is opened diagonally upward toward the exhaust port. Further, two, second scavenging ports 7a, 7b are opened diagonally upward on both right and left sides of the first scavenging port 6, and two, third scavenging ports 8a, 8b are opened between the scavenging ports diagonally upward. In this case, the blowing-up angles of both the third scavenging ports 8a, 8b are set at the same as or less than the blowing-up angle theta1 of the first scavenging port 6, and the blowing-up angles of the third scavenging ports are set larger than the blowing-up angle of both the second scavenging ports 7a, 7b.

25. 发明专利

JPH08128326A SCAVENGING DEVICE OF TWO-CYCLE ENGINE 失效
公开(公告)号：JPH08128326A
公开(公告)日：1996-05-21
申请号：JP26978594
申请日：1994-11-02
申请人： DAIHATSU MOTOR CO LTD
发明人： HORI NAOHITO , OGAWA TADAO
IPC分类号： F02F1/00 , F02B25/04 , F02B31/02 , F02B75/02 , F02F1/22
摘要： PURPOSE: To enhance performance by equalizing swirls and scavenging pressures between respective cylinders. CONSTITUTION: A scavenging chamber 3 in which plural cylinders 2a to 2c are arranged in series to each other and which respectively surrounds the periphery of the respective cylinders 2a to 2c and is composed of mutually communicated single chambers, is formed, and new air is introduced into the cylinders 2a to 2c from the scavenging chamber 3 through plural scavenging holes 7 formed on a cylinder peripheral wall. The scavenging holes 7 of the respective cylinders 2a to 2c are formed so as to incline in the same direction in the tangent direction to the radial directional axis of the cylinders 2a to 2c, and plural new air introducing ports 4a to 4c are arranged on one side of the scavenging chamber 3 in response to the respective cylinders 2a to 2c. Partition walls 8a to 8c to form a new air flow running in the inclining direction of the scavenging holes 7 are arranged on the outer periphery of the respective cylinders 2a to 2c between outer peripheral surfaces of the respective cylinders 2a to 2c and an inner peripheral wall of the scavenging chamber 3.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式