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公开(公告)号：JP2014009630A
公开(公告)日：2014-01-20
申请号：JP2012146740
申请日：2012-06-29
Applicant: Mazda Motor Corp , マツダ株式会社
Inventor： NISHIDA MASAMI , SHIMOKAWA YUKI
IPC: F02M47/00
CPC classification number: F02M51/06 , F02D41/20 , F02D41/3029 , F02D2041/2079 , F02M45/08 , F02M51/0617 , F02M61/1833
Abstract: PROBLEM TO BE SOLVED: To provide a fuel injection device of direct-injection engine which improves fuel consumption over a wide operation region of an engine 1 by using a fuel injection valve (injector 80) of which the fuel injection accuracy is improved over a wide range from a low injection amount to a high injection amount.SOLUTION: A fuel injection valve has a first solenoid coil 81 for stroking a valve body (needle 83) which is stroked so as to open and close injection holes 84 with a first stroke amount and a second solenoid coil 82 for stroking the valve body with a second stroke amount. when an operation state is at least in a region having a lower load than a predetermined load, in a low load region where compression ignition combustion is performed, a controller (PCM10) drives only the first solenoid coil so as to perform fuel injection within an intake process period and, when the operation state is in a region of a lower speed than a predetermined speed within a high load region, at least the second solenoid coil is driven so as to perform the fuel injection at a fuel pressure of 40 MPa or more, in a period from a compression process later time to an expansion process initial time.
Abstract translation: 要解决的问题：提供一种直喷式发动机的燃料喷射装置，其通过使用燃料喷射精度提高的燃料喷射阀（喷射器80）来改善发动机1的宽操作区域的燃料消耗 范围从低喷射量到高喷射量。解决方案：燃料喷射阀具有用于抚摸阀体（针83）的第一螺线管线圈81，其被抚摸以便打开和关闭具有第一冲程量的喷射孔84 以及第二螺线管线圈82，用于以第二冲程量对阀体进行冲程。 当操作状态至少在负荷低于预定负荷的区域中时，在进行压缩点火燃烧的低负荷区域中，控制器（PCM10）仅驱动第一螺线管线圈，以进行燃料喷射 并且当运转状态处于高负荷区域内比规定速度低的区域的情况下，至少驱动第2螺线管线圈以在40MPa的燃料压力下进行燃料喷射，或者 更多的是，从压缩过程以后的时间到扩展过程的初始时间。
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公开(公告)号：JPH0726921A
公开(公告)日：1995-01-27
申请号：JP19403293
申请日：1993-07-09
Applicant: MAZDA MOTOR
Inventor： FUKUMA MASANARI , DEGUCHI HIROAKI , NISHIDA MASAMI , ASAI AKIRA
Abstract: PURPOSE:To prevent occurrence of knocking sound caused by backlash, by engaging a helical spline shaft in a helical spline hole so as to relatively rotate a cam shaft and a cam pulley shaft, and by applying hydraulic oil in the helical spline meshing space. CONSTITUTION:A torque given by the rotation of a cam pulley 2 by an engine is transmitted from a helical spline hole 23 in an inner rotor 18 to a helical spline shaft 24 of a cam shaft 1, and accordingly, the cam shaft 1 and the cam 3 are rotated simultaneously with the drive of an oil pump 14. Upon change-over of valve timing, the oil pressure discharged from the oil pump 14 is fed into a hydraulic port 31 or 32 of a hydraulic cylinder 4, and a cam shaft 1 is shifted by means of a piston 5. In association with the shifting of the cam shaft 1, the cam shaft 1 and the cam pulley 2 are angularly displaced, relative to each other. Further, at this time, the pressure oil in the pump chamber 26 is fed into the helical spline meshing space through a gap 27, thereby it is possible to prevent occurrence of knocking sound caused by backlash.
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公开(公告)号：JPH06280525A
公开(公告)日：1994-10-04
申请号：JP7169293
申请日：1993-03-30
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , DEGUCHI HIROAKI , FUKUMA MASANARI , ASAI AKIRA
Abstract: PURPOSE:To provide a valve timing control device for an engine which can vary opening/closing timings and a lifting rate of a tappet, and has a simple and compact structure. CONSTITUTION:A first and a second rotational members 17, 20 which respectively are in press-contact with a rear end of a cam shaft 3 for united rotation are provided. The first rotational member 17 is screwed with the second rotational member 20 through a screwing part 25. When rotational phase difference is generated between the rotational members 17 and 20, the rotational members 17 and 20 are relatively displaced in a front and back direction, and the can shaft 3 is moved in the front and back direction. The rotation of the first and second rotational members 17, 20 is stopped by means of a first and a second stoppers 27, 29, so that the cam shaft 3 is moved in the front and back direction, and a valve timing control device 7 is simplified.
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公开(公告)号：JPH06272524A
公开(公告)日：1994-09-27
申请号：JP6417693
申请日：1993-03-23
Applicant: MAZDA MOTOR
Inventor： ASAI AKIRA , NISHIDA MASAMI , FUKUMA MASANARI
Abstract: PURPOSE:To compact the whole of a valve system by setting each cam surface of driving cams and oscillating cams so that an acceleration component by the oscillating cams becomes larger than an acceleration component by the driving cams in a positive acceleration region in an acceleration characteristic of valve lift. CONSTITUTION:Cam shapes of cam surfaces 7a, 8a of each of driving cams 7, 8 and cam surfaces 41, 51 of each of oscillating cams 4, 5 are set so that an acceleration component by the oscillating cams 4, 5 becomes larger than an acceleration component by the driving cams 7, 8 in a positive acceleration region in an acceleration characteristic of valve lift. Consequently, the oscillating cams 4, 5 can secure the maximum valve lift of a valve at a smaller oscillating angle and can shorten cam noses of the driving cams 7, 8 to drive them by the amount of the oscillating angle of the oscillating cams 4, 5 reduced. Consequently, it is possible to compact a valve system.
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公开(公告)号：JPH06117207A
公开(公告)日：1994-04-26
申请号：JP26256692
申请日：1992-09-30
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI
IPC: F01L13/00
Abstract: PURPOSE:To increase the degree of setting freedom of valve lift characteristics by forming the contact surfaces of an oscillating cam and a drive cam in tapered shape in the rotating direction of a drive cam shaft, respectively, and varying the relative rotational phase of the drive cam and a crankshaft according to the movement of the drive cam to the rotating direction of the drive camshaft. CONSTITUTION:A rush adjuster 2 is provided on an intake or exhaust valve 1, and an oscillating cam 3 is made in contact slidably with it. The oscillating cam 3 is held rotatably on an oscillating cam shaft 4, and a drive cam 5 is held by the oscillating cam shaft. The oscillating cam 3 is made in contact with the drive cam 5 by an energizing means 7. In the oscillating cam 3, a cam surface 8 is made in contact with the rush adjuster 2, a tapered rear part 9 with an inclination in the rotating direction of the oscillating cam shaft 4 is formed and, similarly, made in contact with the drive cam 5 formed in a tapered shape. Thus the contact position of the cam surface 8 with the rush adjuster 2 is varied according to a lift of the drive cam 5 to increase the degree of setting freedom of lift characteristics.
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Patent Agency Ranking
公开(公告)号：JPH0617626A
公开(公告)日：1994-01-25
申请号：JP17711192
申请日：1992-07-03
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , FUKUMA MASANARI , ASAI AKIRA
Abstract: PURPOSE:To reduce the number of slidable contact parts necessary to oscillate an oscillating cam to lift an intake valve or an exhaust valve of an engine and to reduce the number of parts. CONSTITUTION:An oscillating cam 12 is oscillated in the slidably contacted condition with an intake or an exhaust valve 10 of the engine through a lash adjuster 11, and the valve 10 is lifted by the oscillation. A fundamental circular part 12b not to lift the valve 10 even when being brought into contact in a slidable manner, and a lift circular part 12c to lift the valve 10 when being brought into contact in a slidable manner are formed on a cam surface 12a of the oscillating cam 12. A roller 16 is abutted a driving cam 14, and oscillated followed by the rotation of the driving cam 14, and at the same time, the roller is held by the oscillating cam 12 so as to oscillate the oscillating cam 12. The opening/closing timing of the valve 10 is changed when the distance between the point of contact of the roller 16 where the fundamental circular part 12b of the oscillating cam 12 is brought into slidable contact with the valve 10 and the center of oscillation of the oscillating cam 12 is changed.
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公开(公告)号：JPH0617623A
公开(公告)日：1994-01-25
申请号：JP17707992
申请日：1992-07-03
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , FUKUMA MASANARI , ASAI AKIRA
Abstract: PURPOSE:To securely prevent the impact noise generated in an intake valve or an exhaust valve or the breakage of the suction valve or the exhaust valve when the intake valve or the exhaust valve is lifted by an oscillating cam. CONSTITUTION:A fundamental circular part where a valve is not lifted even when the fundamental circular part may directly or indirectly be brought into contact with the intake valve or the exhaust valve in a slidable manner, and a lift circular part to be formed adjacent to the fundamental circular part where the valve is lifted when the lift circular part may directly or indirectly be brought into contact with the valve are formed on a cam surface 12a of an oscillating cam 12. A buffer circular part to more gently lift the valve than the other part in the lift circular part when being brought into contact in a slidable manner is provided on the part of the lift circular part adjacent to the fundamental circular part.
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公开(公告)号：JPH0586828A
公开(公告)日：1993-04-06
申请号：JP27306891
申请日：1991-09-24
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , AOKI MOTOI , NAKAGAWA YOSHIHIRO
Abstract: PURPOSE:To improve the rigidity and sealing ability of a cam cap, and prevent oil fed into a cylinder head from leaking out to the outside. CONSTITUTION:There is provided a cam cap 20 which is integratedly-formed on the upper side around the front ends of two intake/exhaust cam shafts CS, and a cover member 9 for covering a cam pulley 7 where a timing belt 8 is engaged is fixed at the front surface side of the cam cap 20. Besides, the front end part of the cylinder head cover 3 is fixed on the rear surface side of the cam cap 20, and an oil filler passage 26 which extends in a vertical direction is integratedly-formed from a passage wall 29 which forms a reinforcement wall reinforcing the cam cap 20 between bearing storage parts 25L, 25R which receive the front end adjacent parts of both the intake/exhaust cam shafts CS of the cam cap 20.
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公开(公告)号：JPH051515A
公开(公告)日：1993-01-08
申请号：JP18047791
申请日：1991-06-26
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI
Abstract: PURPOSE:To provide a valve timing changeable mechanism which achieves reduction of a power consumption at the time of actuation, prevention of abrasion at abrasive parts, and improvement in fuel consumption performance. CONSTITUTION:When a brake torque is applied to an advancing drum 5, an advancing plate 7 is moved axially to change a phase of mutual connection between a sprocket 3 and a hub 4. A key member 54 interlocked with the drum 5 to move is guided by a guide groove 44 provided at the hub 4. The key member 54 moves along the guide groove 44 to be prohibited by a prohibiting part to prohibit it from moving, and held by a holding part to receive it and hold it. A need of applying a brake torque continuously is thus eliminated.
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公开(公告)号：JPH04292557A
公开(公告)日：1992-10-16
申请号：JP5757691
申请日：1991-03-22
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , TOKUYAMA MASAKAZU
Abstract: PURPOSE:To reduce the thermal stress to be generated in the structure near the end wall by integrally coupling the upper of a cylinder head end wall and the upper of a plug installation cylinder located nearest to the end wall with an oil reservoir formation part forming an oil reservoir. CONSTITUTION:A coupling wall 10 extended almost horizontally from the end wall 2 of a cylinder head 1 toward a plug installation cylinder 5, which is located nearest to the end wall 2, is comprised. At this stage, an oil reservoir formation part 12 forming an oil reservoir 13 couples the end wall 2 and the plug installation cylinder 5 integrally. Thermal deformation to be generated in the cylinder head 1 by temperature difference of the upper and the lower is thereby restricted by the oil reservoir formation part 12 to reduce the thermal stress to be generated in the structure such as the coupling wall 10 near the end wall 2.
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