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1. 发明专利

JP2000337114A VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000337114A
公开(公告)日：2000-12-05
申请号：JP14258099
申请日：1999-05-24
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： NAKAMURA MAKOTO , HARA SEINOSUKE , YAMADA YOSHIHIKO , TAKEDA KEISUKE , GOTO TETSUAKI
IPC分类号： F01L1/18 , F01L13/00
摘要： PROBLEM TO BE SOLVED: To suppress the generation of collision strike noise with the excessive load of each slide part being reduced through the decrease of inertia torque by reducing inertia mass of an oscillajion cam. SOLUTION: A drive cam 15 fixed on a drive shaft 13 and an oscillation cam 17 oscillatively supported on the drive shaft 13 are brought into a mechanically interlinking state through a transmission mechanism. By performing oscillation slide of the cam surface 22 of the oscillating cam 17 over the upper surface of a valve lifter, a suction valve 12 is caused to perform opening and closing operation. In a so formed valve system, the pin hole 21a of a coupling pin 28 is formed through in the cam nose part 21 of the oscillation cam 17 and in a position sufficiently approaching the cam surface 22 and a notch is formed in the upper end part of the oscillation cam to reduce mass.

2. 发明专利

JP2000087961A BEARING CONFIGURATION AND VARIABLE VALVE GEAR FOR INTERNAL COMBUSTION ENGINE USING BEARING CONFIGURATION 失效
公开(公告)号：JP2000087961A
公开(公告)日：2000-03-28
申请号：JP26380898
申请日：1998-09-18
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： TAKEDA KEISUKE , MOGI KATSUYA
IPC分类号： F01L13/00 , F16C17/02 , F16C17/18
摘要： PROBLEM TO BE SOLVED: To reduce eccentricity between a bearing and a rotating shaft by setting a coefficient of friction on an inner peripheral side between an inner peripheral surface of a floating bush and an outer peripheral surface of the rotating shaft greater than a coefficient of friction on an outer peripheral side between an outer peripheral surface of the floating bush and an inner peripheral surface of the bearing. SOLUTION: A floating bush 3 of a cylindrical shape is interposed to be slidable between a rotating shaft 2 and a bearing 1 through which the rotating shaft 2 is rotatably inserted. A clearance 6 on an inner peripheral side having a predetermined width D1 is formed between an inner peripheral surface 5 of the floating bush 3 and an outer peripheral surface 2a of the rotating shaft 2 and a clearance 7 in a recovery side having a predetermined width D2 is provided between an outer peripheral surface 4 of the floating bush 3 and an inner peripheral surface 1a of the bearing 1. Accordingly, a coefficient of friction on an inner peripheral side between the inner surface 5 of the floating bush 3 and the outer peripheral surface 2a of the rotating shaft 2 is set sufficiently greater than a coefficient of friction on an outer peripheral side between the outer peripheral surface 4 of the floating bush 3 and the inner peripheral surface 1a of the bearing 1.

3. 发明专利

JPH11247636A VARIABLE VALVE SYSTEM FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH11247636A
公开(公告)日：1999-09-14
申请号：JP5161298
申请日：1998-03-04
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： HARA SEINOSUKE , NAKAMURA MAKOTO , YAMADA YOSHIHIKO , TAKEDA KEISUKE , TAKEMURA SHINICHI
IPC分类号： F01L13/00
摘要： PROBLEM TO BE SOLVED: To provide a device having good on board property on an engine by suppressing the lateral and vertical sizes of the device so as to form the whole device in a compact size while variably controlling valve timing and valve lift. SOLUTION: A rocker arm 18 is freely swingably supported on the periphery of a driving cam 15 fixed on a driving shaft 13 through the fitting hole 23 of a center part 18a, and also a rocking cam 17 is swung by the rocking motion of the rocker arm 18 through a link member 20, thereby an intake valve 12 is operated in opening/closing. The rocking fulcrum of the rocker arm 18 to the driving cam 15 is controlled by a variable mechanism 24, thereby the abutting position of the rocking cam 17 to the top face of a valve lifter is changed so as to vary the valve lift of the intake valve 12.

4. 发明专利

JPH11210435A VARIABLE VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH11210435A
公开(公告)日：1999-08-03
申请号：JP1845498
申请日：1998-01-30
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： GOTO TETSUAKI , YAMADA YOSHIHIKO , TAKEDA KEISUKE
IPC分类号： F01L13/00
摘要： PROBLEM TO BE SOLVED: To provide a variable valve system of internal combustion engine capable of preventing a rocker arm from being worn. SOLUTION: A link mechanism L for opening and closing an intake valve 10 comprises a rocker arm 14 fitted rotatably onto a control shaft 12, a link arm 5 fitted rotatably onto the outer periphery of an eccentric cam 4, an oscillating cam 8 which is fitted swingably on the outer periphery of a camshaft 3 and has a cam surface 8b in contact slidably with a valve lifter, and a link member 7 and pins 15, 16, and 18 for joining them to each other. A clearance L5 between the oscillating cam 8 and a cam bracket 7 is reduced smaller than that L3 between the rocker arm 14 and the cam bracket 7, and a clearance L4 between the oscillating cam 8 and the eccentric cam 4 is reduced smaller than a clearance L2 between the rocker arm 14 and the link arm 5. Thus, even if the oscillating cam 8 is brought into contact with an adjacent member, the rocker arm 14 is not brought into contact with the adjacent member.

5. 发明专利

JP2001003720A VARIABLE VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2001003720A
公开(公告)日：2001-01-09
申请号：JP17178899
申请日：1999-06-18
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： NOHARA TSUNEYASU , TAKEMURA SHINICHI , TAKEDA KEISUKE
IPC分类号： F01L13/00
摘要： PROBLEM TO BE SOLVED: To reduce holding torque required for holding a control shaft at a specified rotation position. SOLUTION: In this valve system, when a drive shaft 11 is rotated interlocked with an engine, a rocking cam 18 rocks through an eccentric cam 12, ring-shaped link 13, rocker arm 16 and rod-shaped link 17, opening and closing an intake valve 19. When a control shaft 14 is driven to rotate by a drive section, the position of the center C of the control shaft 14 which is the rocking center of the rocker arm 16 varies, changing the lift property of the intake valve 19. Setting is done so that when the rocking cam rocked to the highest lift side in a specified operation state, the first line L1 linking the center C3 of the control shaft 14 and the center C1 of the drive shaft 11 and the second line linking the center C3 of the control shaft 14 and the center C4 of a control cam 15 do not make an angle of about 90 deg..

6. 发明专利

JPH11270322A VALVE SYSTEM FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH11270322A
公开(公告)日：1999-10-05
申请号：JP7364298
申请日：1998-03-23
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： NAKAMURA MAKOTO , HARA SEINOSUKE , YAMADA YOSHIHIKO , TAKEDA KEISUKE , TAKEMURA SHINICHI
IPC分类号： F01L13/00
摘要： PROBLEM TO BE SOLVED: To increase cam lifting quantity of an oscillating cam as lessening the traveling quantity of the oscillating cam on a follower. SOLUTION: A driving cam fixed to a drive shaft 13 and an oscillating cam 17a oscillatingly supported by the same drive shaft 13 are mechanically interlinked together by a transmitting mechanism and an intake valve is actuated to open and close by a cam surface 22 (22a, 22b) of the oscillating cam 17a oscillatingly sliding on the top of a valve lifter. An approximately zero acceleration section θ3 is successively provided following the section from an initial ramp section θ1 to a regular acceleration section θ2 in the area from the starting point of the cam lift of the oscillating cam 17a to a maximum lift point K1 and the approximately zero acceleration section θ3 is continued within a specific range.

7. 发明专利

JPH10280926A DRIVE CONTROLLING DEVICE OF SUCTION AND EXHAUST VALVE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH10280926A
公开(公告)日：1998-10-20
申请号：JP8710197
申请日：1997-04-07
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： HARA SEINOSUKE , HIDAKA AKIRA , YAMADA YOSHIHIKO , SAITO MASAHARU , TAKEDA KEISUKE , TAKEMURA SHINICHI
IPC分类号： F01L1/04 , F01L13/00
摘要： PROBLEM TO BE SOLVED: To improve the controlling accuracy of the valve timing of a drive controlling device of suction and exhaust valves for internal combustion engines as well as to make the device more compact and increase its mountability to engines. SOLUTION: There is provided a circular disc 38 which rotates with eccentricity to the diametrical direction of a driving shaft 21 between the driving shaft 21 and a split end section 22b of a camshaft 22. By eccentrically moving a center Y of the circular disc 38 around an axis X of the driving shaft 21 an operating angle of a suction valve is made to change. This circular disc connects both shafts 21, 22 via driving and driven pins 36, 37 provided respectively on a driving plate 33 of the driving shaft and the boss section 31 of the camshaft and is also supported freely rotatable through a first cam ring 39 and a second cam ring 40.

8. 发明专利

JP2002242619A VARIABLE VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2002242619A
公开(公告)日：2002-08-28
申请号：JP2001039383
申请日：2001-02-16
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： NOHARA TSUNEYASU , TAKEMURA SHINICHI , TAKEDA KEISUKE
IPC分类号： F01L1/34 , F01L13/00 , F02D13/02
摘要： PROBLEM TO BE SOLVED: To surely prevent an intake valve 1 from being interfered with a piston when a control fails. SOLUTION: A crank rotating body 40 rotated in synchronous with a crankshaft comprises a phase change mechanism for changing the rotating phase of a drive shaft for driving the intake valve and an operating angle change mechanism for varying the operating angle of the intake valve. A stopper 85 limiting the rotating range of the drive shaft by engaging with the engagement groove 87 of the drive shaft and a weight mass 81 disposed off the axis O of the crank rotating body 40 are installed on a lever 82 swingably supported on the crank rotating body 40. A spring (energizing means) 88 is installed for energizing the lever 82 in such a direction that the stopper 85 departs from the engagement groove 87.

9. 发明专利

JP2001082192A CONTROL POSITION DETECTING DEVICE FOR VARIABLE VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2001082192A
公开(公告)日：2001-03-27
申请号：JP26580199
申请日：1999-09-20
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： OKAMOTO NAOKI , NAKAMURA MAKOTO , TAKEDA KEISUKE , TAKEMURA SHINICHI
IPC分类号： G01B21/22 , F01L3/24 , F01L13/00 , F02D13/02 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To improve durability and use a sensor system in common by rotary- driving a control shaft by an actuator, and varying the rocking fulcrum of a rocker arm to change the lift characteristic of an engine valve. SOLUTION: A counter reset to zero when a reference signal REF is generated is counted up for every position signal POS. The value of the counter when the first detection signal from a rocking position sensor is generated is taken as a value corresponding to the phase difference D1, and the value of the counter when the second detection signal from the rocking position sensor is taken as a value corresponding to the phase difference D2. An operating angle is detected from a difference (D2-D1) between the phase differences D1 and D2, and according to the detected operating angle and the phase difference D1 (or phase difference D2), the rotational phase of a cam shaft to a crankshaft is detected. Accordingly, the number of sensor is decreased so as to reduce the cost, and since the operating angle is detected by a non-contact sensor, high durability can be obtained.

10. 发明专利

JP2001020707A OPERATING ANGLE DETECTION SYSTEM FOR VARIAVLE VALVE TRAIN OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2001020707A
公开(公告)日：2001-01-23
申请号：JP19733299
申请日：1999-07-12
申请人： UNISIA JECS CORP , NISSAN MOTOR
发明人： OKAMOTO NAOKI , TAKEDA KEISUKE , NOHARA TSUNEYASU
IPC分类号： G01B11/26 , F01L1/46 , F01L13/00 , F02D13/02
摘要： PROBLEM TO BE SOLVED: To detect operating angles with high durability by detecting the operating angles based on signals on a predetermined position of a rocker arm or a swing cam, and a reference angular position and a unit angular position of operating members such as a camshaft, crankshaft and the like which operates in synchronism with a speed. SOLUTION: A counter starts to count every positional signal received by a position sensor 114 at every unit angle after reset to zero by a reference signal fed by a reference sensor 115 at every reference angular position of a camshaft. The value of the counter, when a first swing position signal BS is fed from a swing position sensor 116 which outputs swing position signals BS, AS before and after an intake valve is lifted, is read as value corresponding to phase difference D1. From the phase difference, an actual operating angle of a control shaft 16 is detected. Furthermore, the value of the counter when the next swing position signal AS is fed from the swing position sensor is read as value corresponding to phase difference D2, and the detected data on operating angles is renewed.

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