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41. 发明专利

JPH029162B2 失效
公开(公告)号：JPH029162B2
公开(公告)日：1990-02-28
申请号：JP8105284
申请日：1984-04-24
申请人： NISSAN MOTOR
发明人： HARA SEINOSUKE , MATSUMOTO YASUO , MIIDOKORO KAZUYUKI , YOSHIKAWA YASUO
IPC分类号： F01L13/00

42. 发明专利

JPH01106926A COMPRESSION RATIO VARYING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH01106926A
公开(公告)日：1989-04-24
申请号：JP26317087
申请日：1987-10-19
申请人： NISSAN MOTOR , ATSUGI MOTOR PARTS CO LTD
发明人： BITO HIROMICHI , ARAI TAKAYUKI , TAKASHIMA YASUO , HARA SEINOSUKE , MATSUYA TATSUYUKI
IPC分类号： F02D15/02 , F01M1/06 , F02F3/00 , F16J1/16
摘要： PURPOSE:To prevent unstable action of an outer piston by preventing air from being blending in a lower liquid chamber during switching of a compression ratio by means of a check valve equipped in a pressure oil discharge passage provided in the lower liquid chamber. CONSTITUTION:An upper liquid chamber 29 and a lower liquid chamber 30 are formed between an outer piston 21 and an inner piston 27. A communication passage 34 for placing both liquid chambers in mutual connection is provided so as to guide the outer piston 21 and the inner piston 27 to make relative movement. Air is prevented from being blended in the lower liquid chamber 30 when the pressure oil in the lower liquid chamber 30 is introduced into the upper liquid chamber 29 through the communication passage 34 to change a compression ratio by installing the fifth check valve 42 in a discharge passage 37 leading from the lower liquid chamber 30.

43. 发明专利

JPS6480737A COMPRESSION RATIO ADJUSTABLE DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS6480737A
公开(公告)日：1989-03-27
申请号：JP23815487
申请日：1987-09-22
申请人： NISSAN MOTOR , ATSUGI MOTOR PARTS CO LTD
发明人： BITO HIROMICHI , ARAI TAKAYUKI , TAKASHIMA YASUO , HARA SEINOSUKE , MATSUYA TATSUYUKI
IPC分类号： F01M1/06 , F02D15/02 , F02F3/00
摘要： PURPOSE:To make it possible to surely prevent free turning to the inner piston of an outer piston by performing projection and recessed engagement of the outer piston and inner piston along the vertical and axial direction. CONSTITUTION:Recessed sections 33 and 33 are formed along the vertical and axial direction on the inner circumference of an outer piston 21. On the other hand, projected sections 35 and 35 to be engaged with the recessed sections 33 and 33 are formed along the vertical and axial direction on the outer circumference of an inner piston 29. This surely prevents the free turning of the outer piston 21 because of the projection-recessed engagement of the recessed sections 33 and engaging projected sections, even if the turning force is acted on the outer piston 21 in a circumferential direction in operating an engine and in switching high and low compression ratio states. Moreover, such contact at faces with each other due to projection-recessed engagement allows facial pressure to be dispersed to the whole of the faces and partial facial pressure to be lessened, which prevents partial abrasion, thereby improving endurance.

44. 发明专利

JPS63302150A COMPRESSION RATIO VARIABLE DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS63302150A
公开(公告)日：1988-12-09
申请号：JP13711187
申请日：1987-05-29
申请人： NISSAN MOTOR , ATSUGI MOTOR PARTS CO LTD
发明人： BITO HIROMICHI , ARAI TAKAYUKI , KONDO TAKEHISA , HARA SEINOSUKE , SUGA SEIJI
IPC分类号： F02D15/02 , F02F3/00 , F16J1/16
摘要： PURPOSE:To cool a piston efficiently and prevent the deterioration of pressure oil by forming a passage groove between inner and outer pistons for making pressure oil feed and discharge passages continuous to each other, and causing the pressure oil to circulate into an upper fluid chamber via said passage groove under a low compression ratio condition. CONSTITUTION:In order to obtain a small compression ratio at the high load and the like of an internal combustion engine, the opening of a pressure regulating valve 47 is made small via a control circuit 48 and pressure oil of high pressure is supplied from a main oil passage 34 to a hydraulic fluid chamber 25. As a spool valve 26 consequently moves left, the capacity of an upper fluid chamber 31 decreases and an outer piston 21 moves downward, thereby making a low compression ratio available. In this case, the pressure oil in the hydraulic chamber 25 is made to flow from the second oil passage 36 to a passage groove 50 and discharged from the fourth oil passage 38 without any change. In this way, the pressure oil is circulated in a space between the crown lower surface 21b of the outer piston 21 and the upper surface 29b of an inner piston 29. The crown part of the piston 21, therefore, can be cooled efficiently and the deterioration of the pressure oil can be prevented.

45. 发明专利

JPS63129136A COMPRESSION RATIO VARIABLY CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS63129136A
公开(公告)日：1988-06-01
申请号：JP27466486
申请日：1986-11-18
申请人： ATSUGI MOTOR PARTS CO LTD , NISSAN MOTOR
发明人： HAMADA HIROAKI , SUGA SEIJI , HARA SEINOSUKE , GOTO TAKAHARU , KATO MANABU , ARAI TAKAYUKI
IPC分类号： F02D15/02 , F02D15/04
摘要： PURPOSE:To obtain a device with high reliability in its action, by connecting a piston main unit and an inner piston with a connecting rod through an eccentric bearing and a piston pin and mounting a slidable spacer to be interposed between the piston main unit and the piston pin. CONSTITUTION:In the case of an engine whose compression ratio is variably controlled by changing a piston stroke in accordance with a supply pressure of oil to a pressure oil chamber 22 partitioned between a piston main unit 20 and an inner piston 21 mounted to be slidably fitted to said piston main unit 20, the inner piston 21 is connected to the end part of a connecting rod 25 through a sleeve-shaped eccentric bearing 24 fitting its both ends turnably to a boss part 23. A piston pin 26 is mounted fitting to an eccentrically formed shaft hole of the eccentric bearing 24, and a rectangular hole 28, which inserts a pin end part, is formed in a skirt part 27 of the piston main unit 20 corresponding to said pin 26. And the piston main unit 20 is supported to the hole 28 by providing a squared spacer 29, fitted to the end part of the piston pin 26, to be brought into slide contact with said hole 28.

46. 发明专利

JPS6385218A SUCTION AIR SYSTEM DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS6385218A
公开(公告)日：1988-04-15
申请号：JP23246886
申请日：1986-09-29
申请人： NISSAN MOTOR
发明人： BITO HIROMICHI , HARA SEINOSUKE , KATO MANABU
IPC分类号： F02B29/08 , F02B31/02
摘要： PURPOSE:To seek to improve engine output by setting the valve lifting amount of one inlet valve, which is positioned near a spark plug, smaller than that of the other inlet valve, in a device which has two suction ports per each cylinder and is provided with a swirl control valve. CONSTITUTION:The suction air which passed through a throttle chamber 2 from an air cleaner branches off inside a collector 8 and enters four suction pipes (suction air passages) 9 which are provided for each cylinder and have cylindrical shapes and then is supplied to a combustion chamber 12 from a suction port 12. The suction port 19 branches off into two on the combustion chamber side 21 and has primary and secondary suction ports 22, 23. In this case, the cam shape of a cam shaft is decided so that the inlet valve 25 on the secondary side positioned near a spark plug may become always smaller than the inlet valve 24 on the primary side as regards the lifting amount of the inlet valves 24, 25 which open and close each suction port 22, 23.

47. 发明专利

JPS62248811A MOVING VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS62248811A
公开(公告)日：1987-10-29
申请号：JP9227086
申请日：1986-04-23
申请人： NISSAN MOTOR
发明人： MATSUMOTO YASUO , HARA SEINOSUKE , BITO HIROMICHI , KATO MANABU
IPC分类号： F01L13/00
摘要： PURPOSE:To aim at reduction of the generation of hammering and overshooting in an engine by making the difference in level between the planes of action of cams smaller as the quantity of lift of cams becomes larger in the case of a cam, which is provided with a plurality of planes of action, for varying the inclination of a lever touching the rear of a rocker arm. CONSTITUTION:On the rear of a rocker arm 13, whose one end touches a cam 11, and the other end touches the edge of an intake and exhaust valve 12, is provided a lever 15 whose one end is supported by a pivot 19, and the other end is caused to touch a control cam 20, and then, the valve timing and lift of the intake and exhaust valve 12 is controlled by way of varying the position of a supporting point on the rear of the rocker arm 13 by varying the inclination of the lever 15. The cam 20 is provided with a plurality of control faces 20a-20e, and the differences in level between each of these control faces 20a-20e are set to smaller as the quantity of lift becomes larger. Thereby, in an operating range where the quantity of lift becomes larger, the lubricating oil is fed in a larger quantity so that the generation of overshooting in the case of controlling the cam can be prevented.

48. 发明专利

JPS62159709A VALVE OPERATION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS62159709A
公开(公告)日：1987-07-15
申请号：JP19686
申请日：1986-01-07
申请人： NISSAN MOTOR
发明人： KATO MANABU , HARA SEINOSUKE , BITO HIROMICHI , MATSUMOTO YASUO
IPC分类号： F01L13/00
摘要： PURPOSE:To provide a reliable operation with use of a compact motor having a small capacity, by detecting a rotational speed of a motor such as a d.c. motor for driving a lift control cam, and controlling an output voltage to the motor so as to make the detected rotational speed equal to a target rotational speed. CONSTITUTION:A lift characteristic is variable with a stepwise change of a lift control cam 20 in association with a rotation of a control shaft 23 by a motor 26. A battery B as a power source for a driving circuit A of the motor 26 is connected through a DC/DC converter C to the driving circuit A. Further, a rotative speed detecting means D is provided to detect a rotative speed of the motor 26, and a comparing means E is provided to compare the detected rotative speed with a target rotative speed set according to engine operational conditions. According to the comparative result obtained by the comparing means E, the DC/DC converter C is controlled by an output voltage control means F to control an output voltage to the motor 26.

49. 发明专利

JPS62113807A INTAKE AND EXHAUST VALVES LIFT CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS62113807A
公开(公告)日：1987-05-25
申请号：JP25359185
申请日：1985-11-12
申请人： NISSAN MOTOR
发明人： SATO HAJIME , BITO HIROMICHI , HARA SEINOSUKE
IPC分类号： F01L13/00
摘要： PURPOSE:To make the rotation angle respond to the operating quantity adequately even though there is a load fluctuation in the peak torque and the like, and to simplify the composition, by composing a driving device between a control device and an intake and exhaust valves lift variable device with a DC motor. CONSTITUTION:The feedback control system of an intake and exhaust valves lift variable device 20 has a driving device to rotate a cam control shaft linked to a lift control cam in the device 20 through an elastic member. It also has an object position setting device to set an object position of cam control shaft according to the engine operation condition, a position detecting device 24 to detect the actual position of the cam control shaft, and a control device 25 to control the driving device to unify the actual position and the object position. Furthermore, the operation condition of the engine is detected by an operation condition detecting device 22. In such a composition, the driving device is composed by a DC motor 21. By a large restricting torque of the DC motor 21, the rotation position is controlled adequately, as well as the cam control shaft is held securely.

50. 发明专利

JPS61294109A MULTICYLINDER INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS61294109A
公开(公告)日：1986-12-24
申请号：JP13747285
申请日：1985-06-24
申请人： NISSAN MOTOR
发明人： MATSUMOTO YASUO , HARA SEINOSUKE , BITO HIROMICHI
IPC分类号： F01L1/26 , F01L13/00 , F02D13/02 , F02F1/24 , F02F1/42
摘要： PURPOSE:To improve an output and to reduce fuel consumption, by a method wherein, in an engine having at least two intake valves per a cylinder, the opening and the closing timing and a valve lift amount of each of the two intake valves are steppedly variable depending upon the operating condition of an engine. CONSTITUTION:Main and auxiliary intake valves 26 and 27, opening and closing main and auxiliary intake ports 23 and 24 of each cylinder, are driven through a variable tappet mechanism 30 by means of a driving cam 31. The variable tappet mechanism 30 has a locker arm 32 supported rockably by forcing a back 32A, formed in a bent manner, into fulcrum contact with an under surface 33A of a lever 33. The lever 33 has the one end, the upper surface of which a lift cam control cam 34 is forced into contact with, and the other end part rockably supported to a bracket 37 of a cylinder head 36 through a hydraulic pivot 35. The lift control cam 34 has plural cam surfaces 34a-34b having different valve lift amounts, and controls a rotation amount through a control shaft 40 with the aid of a stepping motor, and this enables a valve lift amount to be controlled throughout a multistage.

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