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    FUEL INJECTION SYSTEM
    12.
    发明专利
    FUEL INJECTION SYSTEM 未知

    公开(公告)号：DE3163073D1

    公开(公告)日：1984-05-17

    申请号：DE3163073

    申请日：1981-07-15

    Applicant: BOSCH GMBH ROBERT

    Inventor： BABITZKA RUDOLF ,  BECK WALTER ,  SCHLAGMULLER WALTER

    IPC: F02M51/00 ,  F02B1/04 ,  F02M47/02 ,  F02M59/36 ,  F02M59/46 ,  F02M63/00

    Abstract: To provide for extremely rapid operating conditions of the valve in an electrically controlled fuel injection system, that is, valve operation in the order of 10-5 seconds, for example, a pump (2, 62) provides pressurized fuel, and two, in push-pull operating valves (4, 64; 5, 65) are provided, in which one of the valves (4, 64) controls initiation of fuel injection, and the other one of the valves (5, 65) controls termination thereof; each one of the valves uses a spring-loaded valve element (18, 38'', 38, 38'), operated by the pressure of the fuel to be injected, the valve elements being retained in a predetermined position by an electrically controlled operating unit (27, 47''; 47, 47') which has a positioning element operating in a positioning path having at least a component which is perpendicular to the operating direction of the valve element and which, as commanded by the control voltage applied thereto, clamps the valve element in a predetermined position, and thus prevents movement of the valve element even though fluid pressure is applied thereto. Preferably, the electrical control element is a stack of piezoelectric disks which, upon energizaton, expand in axial direction and press a clamping stem (26, 46''; 46, 46') the movable valve element (18, 38'', 38, 38') in an operating bore of the valve unit or housing (16, 36).

    13.
    发明专利
    未知

    公开(公告)号：DE3135494A1

    公开(公告)日：1983-03-24

    申请号：DE3135494

    申请日：1981-09-08

    Applicant: BOSCH GMBH ROBERT

    Inventor： BABITZKA RUDOLF ,  BECK WALTER ,  SCHLAGMUELLER WALTER

    IPC: F02D41/40 ,  F02B3/06 ,  F02D1/02 ,  F02D1/12 ,  F02D41/38 ,  F02M41/14 ,  F02M59/36 ,  F02M59/46 ,  F04B49/22 ,  H01L41/08 ,  H01L41/09 ,  F02D5/00

    Abstract: A Diesel engine distributor-type injection pump has a vane pump (3) providing fuel under pressure to an injection pump system formed by two pistons (17) pressed towards each other by a cam track (26) to provide fuel under injection pressure to fuel injection plug connectors (28, 29) when the radial position of a duct (27) in the bore of the rotating shaft (2) matches a connecting duct (28) of a respective injection outlet. To provide for precise timing of fuel being injected, pressurized fuel is drained under control of a slider valve (FIG. 1: 38, 39; FIG. 2: 72, 74) connected through a communicating duct (32, 42, 71) to the slider valve. The slider valve is operated by a piezoelectric positioning element (FIG. 1: 61; FIG. 2: 76) which moves the spool (74, 39) of the slider valve; in one embodiment (FIG. 1), the piezoelectric element operates a piston (53) having a substantially larger diameter than the end faces of the spool (39) to provide for excursion amplification; in another embodiment (FIGS. 2, 4-8), the piezoelectric elements are bending elements and thus provide for larger excursion.

    14.
    发明专利
    未知

    公开(公告)号：DE3031354A1

    公开(公告)日：1982-04-08

    申请号：DE3031354

    申请日：1980-08-20

    Applicant: BOSCH GMBH ROBERT

    Inventor： BABITZKA RUDOLF ,  BECK WALTER

    IPC: H01F7/08 ,  H01F7/16 ,  H01F7/18 ,  H02K33/02 ,  H01L41/08

    Abstract: A piezo-electric control device is used to restrain movement of the armature of an electromagnet until the current through the exciter winding of the electromagnet has reached almost the maximum value. This causes the force applied to the armature to be the maximum force from the start of movement, so that the overall time required for movement of the armature from its starting to its end position is substantially decreased. Specifically, the piezo-electric control device is a column of discs having an axis perpendicular to the axis of movement of the armature. When electrical energy is applied to the column it expands in the axial direction causing a locking member mounted on its end to engage a stop member which is part of the armature. The locking member can either push the stop member against a further rigid stop or two columns can be used to clamp the stop member between them.

    17.
    发明专利
    未知

    公开(公告)号：DE3039967A1

    公开(公告)日：1982-06-03

    申请号：DE3039967

    申请日：1980-10-23

    Applicant: BOSCH GMBH ROBERT

    Inventor： BABITZKA RUDOLF ,  BECK WALTER ,  SCHLAGMUELLER WALTER

    IPC: F02M51/00 ,  F02B1/04 ,  F02M47/02 ,  F02M59/36 ,  F02M59/46 ,  F02M63/00

    Abstract: To provide for extremely rapid operating conditions of the valve in an electrically controlled fuel injection system, that is, valve operation in the order of 10-5 seconds, for example, a pump (2, 62) provides pressurized fuel, and two, in push-pull operating valves (4, 64; 5, 65) are provided, in which one of the valves (4, 64) controls initiation of fuel injection, and the other one of the valves (5, 65) controls termination thereof; each one of the valves uses a spring-loaded valve element (18, 38'', 38, 38'), operated by the pressure of the fuel to be injected, the valve elements being retained in a predetermined position by an electrically controlled operating unit (27, 47''; 47, 47') which has a positioning element operating in a positioning path having at least a component which is perpendicular to the operating direction of the valve element and which, as commanded by the control voltage applied thereto, clamps the valve element in a predetermined position, and thus prevents movement of the valve element even though fluid pressure is applied thereto. Preferably, the electrical control element is a stack of piezoelectric disks which, upon energizaton, expand in axial direction and press a clamping stem (26, 46''; 46, 46') the movable valve element (18, 38'', 38, 38') in an operating bore of the valve unit or housing (16, 36).

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