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    ENGINE STRUCTURE
    3.
    发明专利
    ENGINE STRUCTURE 失效

    公开(公告)号：JPH04325722A

    公开(公告)日：1992-11-16

    申请号：JP9391991

    申请日：1991-04-24

    Applicant: MAZDA MOTOR

    Inventor： SHINTANI HIDETOSHI ,  MORISANE KENICHI ,  MASUDA YUKIO ,  OSUMI TOSHIHIKO

    IPC: F02B61/06 ,  F16C3/06 ,  F16H1/14 ,  F16H37/06

    Abstract: PURPOSE:To provide an engine structure possible to prevent a position of the center of gravity of the whole power plant from getting high as taking a form taking out power between cylinders while possible to lower height of cylinder heads to lower a bonnet line and also possible to lower noise as well. CONSTITUTION:In an engine structure of a form having plural number of cylinders 62a-62d and taking out motive power in a direction nearly orthogonal to extending direction of a crankshaft 24 between two cylinders 62b, 62c among these cylinders, a hollow space part 60 is formed between two cylinders 62b, 62c, and torque of the crankshaft 24 is taken outside by the first bevel gear 26 provided to a part positioning in the hollow space part 60 of the crankshaft 24 and the second bevel gear 28 gearing into the first bevel gear 26.

    MANUFACTURE METHOD FOR ENGINE VALVE LIFTER
    4.
    发明专利
    MANUFACTURE METHOD FOR ENGINE VALVE LIFTER 失效

    公开(公告)号：JPH04246210A

    公开(公告)日：1992-09-02

    申请号：JP1104091

    申请日：1991-01-31

    Applicant: MAZDA MOTOR

    Inventor： ISHIDA YASUAKI ,  MORIMOTO SHIGENORI ,  NOMURA KAZUMASA ,  MASUDA YUKIO ,  UESUGI TATSUYA

    IPC: B21C23/22 ,  F01L1/14

    Abstract: PURPOSE:To increase anti-wear property and rigidity of the skirt part of a valve lifter. CONSTITUTION:Hard particles 5 are adhered by coating, etc., beforehand onto the internal walls of a die 4 in which an anti-wear disk 2 is inserted, an aluminum alloy skirt material 3 is inserted into the die 4, and a backward extrusion of the skirt material and a plastic connection of the disk 2 to the skirt material 3 are made simultaneously. In this case, the skirt material 3 is pressed in to expand and the hard particles 5 adhered onto the surface of the die 4 are embedded into the surface of the skirt material 3, to form a valve lifter in which hard particles 5 are combined on a lower external surface of the skirt material 3.

    CRANKSHAFT FOR ENGINE
    5.
    发明专利
    CRANKSHAFT FOR ENGINE 失效

    公开(公告)号：JPH0460236A

    公开(公告)日：1992-02-26

    申请号：JP17202590

    申请日：1990-06-27

    Applicant: MAZDA MOTOR

    Inventor： MASUDA YUKIO ,  MORISANE KENICHI ,  YOSHIOKA SADASHICHI ,  SHINTANI HIDETOSHI

    IPC: F16C3/20 ,  F16F15/26

    Abstract: PURPOSE:To reduce the extent of knocking in a journal part of a crankshaft by shifting the center of gravity in a counter weight corresponding to each connecting rod of cylinders at both ends as far as the specified value to a leading side in the crankshaft rotational direction. CONSTITUTION:In a crankshaft body 10, the center of gravity in counter weights 22A, 22D of both first and fourth cylindersis shifted as far as the specified value to a leading side in the rotational direction of a crankshaft in relation to a line L connecting the center of a crankpin shaft part 28 to a shaft center of the crankshaft body 10 as shown in a full line, whereas both counter weights 22B, 22C of second and third cylinders are formed into a symmetrical form as shown in broken lines. In this case, this slippage is made properly selectable within the range of =10 deg.-20 deg. or so. Thus any knocking in each journal part at both ends is reducible, while the center of gravity in a counter weight at an intermediate cylinder is not shifted at all, so that a weight increase in the crankshaft is controllable in this way.

    VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE
    7.
    发明专利
    VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE 失效

    公开(公告)号：JPH06272521A

    公开(公告)日：1994-09-27

    申请号：JP8539993

    申请日：1993-03-19

    Applicant: MAZDA MOTOR

    Inventor： YAMAGUCHI MASAFUMI ,  MASUDA YUKIO ,  YAMATANI MITSUTAKA

    IPC: F01L3/10

    Abstract: PURPOSE:To perform high speed rotation of an internal combustion engine of this kind after reducing driving loss by an air pump generating air pressure in the case of using an air spring as a valve spring of suction and exhaust valves in the internal combustion engine. CONSTITUTION:By making, for example, a space formed closedly a second cylinder 21 provided to surround an exhaust valve 8 and an exhaust tappet 22 fit into the second cylinder 21 as a pressure chamber 30 of an air spring 28, pressure air is supplied to the pressure chamber 30. Additionally, a hydraulic piston 32 is inserted inside below the second cylinder 21, and to a hydraulic chamber 36 below the hydraulic piston 32, an oil passage 38 branched from a second hydraulic passage 37 is connected. When the number of rotation of an engine is higher than the specified number of changeover rotation, by introducing working oil to the hydraulic chamber 36 of the second hydraulic piston 32, the piston 32 is moved upward to reduce capacity of the pressure chamber 30.

    VALVE SYSTEM DEVICE FOR ENGINE
    8.
    发明专利
    VALVE SYSTEM DEVICE FOR ENGINE 失效

    公开(公告)号：JPH06248912A

    公开(公告)日：1994-09-06

    申请号：JP5654693

    申请日：1993-02-22

    Applicant: MAZDA MOTOR

    Inventor： MASUDA YUKIO ,  YAMATANI MITSUTAKA ,  YAMAGUCHI MASAFUMI ,  MIYASHITA JUN

    IPC: F01L1/12 ,  F01L1/14 ,  F01L1/24 ,  F01L3/10

    Abstract: PURPOSE:To drop a lube oil from a junction to prevent oil shortage by forming an air pressure chamber structural body between the sheet member of a valve stem and a cylinder head in the shape of ring, providing its center space so that it can face to the junction of the sheet member and the cylinder head, and utilizing the air pressure chamber as an energizing means for closing (returning) an engine valve without sealing the junction. CONSTITUTION:Each of intake and exhaust valves 6, 5 as engine valves has a valve stem 7, a valve disc 8, and an upper sheet 11 as an sheet member is connected through a cotter 12 to the valve stem. An air pressure chamber structural body 18 is made up of the upper sheet 11 and a vessel body 19, and compressed air is supplied from an air supply passage 28 to the center space 26 through an air regulator 29 in order for the air pressure chamber structural body 18 to function as an air spring. When an oil from the upper part of a cylinder head 1 is accumulated in the air pressure chamber structural body 18, the oil is supplied to the valve stem 7, etc., through the center space 26, since the center space 26 faces to the cotter 12, etc. Further, the air pressure chamber can be utilized as an energizing means for closing the valve without sealing the junction of the cotter, etc.

    IGNITION TIMING CONTROL DEVICE FOR DOUBLE SUCTION ENGINE
    9.
    发明专利
    IGNITION TIMING CONTROL DEVICE FOR DOUBLE SUCTION ENGINE 失效

    公开(公告)号：JPS63314368A

    公开(公告)日：1988-12-22

    申请号：JP15177787

    申请日：1987-06-18

    Applicant: MAZDA MOTOR

    Inventor： SUGIYAMA MASAO ,  MASUDA YUKIO

    IPC: F02P5/15

    Abstract: PURPOSE:To suppress the generation of knocking in an engine having main and sub throttle valves by setting an ignition timing under a closed condition of the sub throttle valve in such a manner that a change rate of the ignition timing with respect to a change in engine speed is smaller than that of an ignition timing to be set under an open condition of the sub throttle valve. CONSTITUTION:Main and sub throttle valves are provided in series in a suction passage. The sub throttle valve is closed under a low load operational condition. An open/closed condition of the sub throttle valve is detected by an open/closed condition detecting means A. A first ignition timing setting means B is provided to set a first ignition timing according to an engine operational condition, and a second ignition timing setting means C is provided to set a second ignition timing whose change rate with respect to a change in engine speed is smaller than that of the first ignition timing. An ignition timing control means D is provided to select the use of the setting means B or C in such a manner that the first ignition timing setting means B is used under the open condition of the sub throttle valve, while the second ignition timing setting means C is used under the closed condition of the sub throttle valve.

    IGNITION TIMING CONTROL DEVICE FOR ENGINE
    10.
    发明专利
    IGNITION TIMING CONTROL DEVICE FOR ENGINE 失效

    公开(公告)号：JPS63272966A

    公开(公告)日：1988-11-10

    申请号：JP10590387

    申请日：1987-04-28

    Applicant: MAZDA MOTOR

    Inventor： INOUE SHUNJI ,  MASUDA YUKIO ,  SUGIYAMA MASAO

    IPC: F02P5/15

    Abstract: PURPOSE:To obtain an effect for preventing a temporary engine output drop and a gradual output drop in quick acceleration and deceleration by correcting normal ignition timing depending upon the opening of a sub-throttle valve during the predetermined time when an engine is quickly accelerated and decelerated with a main throttle valve quickly opened and closed. CONSTITUTION:An engine has a sub-throttle valve opening and closing depending upon an intake negative pressure at the downstream side of a main throttle valve in an intake passage. In this case, an ignition timing setting means A is used for setting normal ignition timing depending upon an engine operation condition. Also, an ignition timing correction means B is used for correcting the normal ignition timing depending upon the opening of the sub-throttle valve. And when the absolute value of an opening change rate in the main throttle valve is equal to or larger than the predetermined value, with the sub-throttle valve ready to open and close after the opening and closing of the main throttle valve, an ignition timing control means C is used to operate an ignition device D depending upon corrected ignition timing, for example, during a time from the open and close operation of the main throttle valve to that of the sub- throttle valve.

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