Fuel injection pump for internal combustion engines

Claim 2

A fuel injection pump for internal combustion engines, comprising a pump housing and a supply quantity adjusting member adjustable by an electrically controlled final control element, said supply quantity adjusting member having a profiled governor rod supported in said pump housing, said profiled governor rod includes a main body portion with a shank end in proximity to said final control element, said rod further having an end arranged to extend out of the pump housing toward the final control element, a cylindrical slide bearing sheath secured in said pump housing in proximity to said profiled governor rod, and a displaceably disposed cylindrical governor rod guide ring having a tilt-proof minimal axial length firmly seated on said shank end of said main body portion and secured to said profiled governor rod to close off said governor rod in a sealing manner relative to said cylindrical slide bearing sheath and to the final control element to thereby achieve the least possible radial play in the slide bearing sheath to prevent an overflow of oil from said pump housing to the final control element and a coupling element secured to said shank end of said profiled governor rod for transmitting adjusting forces to said profiled governor rod and further that said guide ring is secured to said shank end between a front face of said coupling element and a shoulder provided on said main body portion of said profiled governor rod.

Claim 3

A fuel injection pump for internal combustion engines, comprising a pump housing and a supply quantity adjusting member adjustable by an electrically controlled final control element, said supply quantity adjusting member having a profiled governor rod supported in said pump housing, said rod further having an end arranged to extend out of the pump housing toward the final control element, a cylindrical slide bearing sheath secured in said pump housing in proximity to said profiled governor rod, and a displaceably disposed cylindrical governor rod guide embodied as a guide ring having a tilt-proof minimal axial length and secured to said profiled governor rod to close off said governor rod in a sealing manner relative to said cylindrical slide bearing sheath and to the final control element to thereby achieve the least possible radial play in the slide bearing sheath to prevent an overflow of oil from said pump housing to the final control element, a threaded shaft secured on said one end of said profiled governor rod and further that said guide ring is received upon said threaded shaft and arranged to be pressed against said one end of said governor rod by means of a threaded nut and a sealing disc interposed between said guide ring and said threaded nut.

Claim 4

A fuel injection pump for internal combustion engines, comprising a pump housing and a supply quantity adjusting member adjustable by an electrically controlled final control element, said supply quantity adjusting member having a profiled governor rod supported in said pump housing, said rod further having an end arranged to extend out of the pump housing toward the final control element, a cylindrical slide bearing sheath secured in said pump housing in proximity to said profiled governor rod, and a displaceably disposed cylindrical governor rod guide embodied as a guide ring having a tilt-proof minimal axial length and secured to said profiled governor rod to close off said governor rod in a sealing manner relative to said cylindrical slide bearing sheath and to the final control element to thereby achieve the least possible radial play in the slide bearing sheath to prevent an overflow of oil from said pump housing to the final control element, a threaded shaft secured on said one end of said profiled governor rod and further that said guide ring is received upon said threaded shaft and arranged to be pressed against said one end of said governor rod by means of a threaded nut and a sealing disc interposed between said guide ring and said threaded nut.

Claim 5

A fuel injection pump for internal combustion engines, comprising a pump housing and a supply quantity adjusting member adjustable by an electrically controlled final control element, said supply quantity adjusting member having a profiled governor rod supported in said pump housing, said rod further having an end arranged to extend out of the pump housing toward the final control element, a cylindrical slide bearing sheath secured in said pump housing in proximity to said profiled governor rod, and a displaceably disposed cylindrical governor rod guide means and secured to said profiled governor rod to close off said governor rod in a sealing manner relative to said cylindrical slide bearing sheath and to the final control element to thereby achieve the least possible radial play in the slide bearing sheath to prevent an overflow of oil from said pump housing to the final control element, and a supporting shaft is secured on said profiled governor rod and further that said guide means consist of a guide ring encompassing said supporting shaft with radial play and being cardan coupled therewith without axial play, and further that an elastic seal is interposed between said supporting shaft and said guide ring.

Claim 6

A fuel injection pump for internal combustion engines, comprising a pump housing and a supply quantity adjusting member adjustable by an electrically controlled final control element, said supply quantity adjusting member having a profiled governor rod supported in said pump housing, said rod further having an end arranged to extend out of the pump housing toward the final control element, a cylindrical slide bearing sheath secured in said pump housing in proximity to said profiled governor rod, and a displaceably disposed cylindrical governor rod guide means and secured to said profiled governor rod to close off said governor rod in a sealing manner relative to said cylindrical slide bearing sheath and to the final control element to thereby achieve the least possible radial play in the slide bearing sheath to prevent an overflow of oil from said pump housing to the final control element, and a supporting shaft is secured on said profiled governor rod and further that said guide means consist of a guide ring encompassing said supporting shaft with radial play and being cardan coupled therewith without axial play, and further that an elastic seal is interposed between said supporting shaft and said guide ring.

Claim 7

A fuel injection pump for internal combustion engines, comprising a pump housing and a supply quantity adjusting member adjustable by an electrically controlled final control element, said supply quantity adjusting member having a profiled governor rod supported in said pump housing, said rod further having an end arranged to extend out of the pump housing toward the final control element, a cylindrical slide bearing sheath secured in said pump housing in proximity to said profiled governor rod, and a displaceably disposed cylindrical governor rod guide means and secured to said profiled governor rod to close off said governor rod in a sealing manner relative to said cylindrical slide bearing sheath and to the final control element to thereby achieve the least possible radial play in the slide bearing sheath to prevent an overflow of oil from said pump housing to the final control element, said governor rod guide means comprises a bolt-like cylindrical guide section of a supporting shaft secured on an end nearer the final control element of the profiled governor rod and that the slide bearing sheath has a tilt-proof minimal axial length and is embodied by a bottom part, protruding inward toward the guide section, of a closure cap secured at the point where the profiled governor rod emerges from the pump housing, and said supporting shaft has a radially protruding annular collar on an end of its guide section nearer the governor rod, which in one terminal stop position of the profiled governor rod shifted with respect to the final control element rests on a ring seal secured in the vicinity of the transition from the closure cap to the slide bearing sheath and additionally seals off an interior of the pump housing which interior receives the profiled governor rod with respect to the final control element.

Claim 8

A fuel injection pump for internal combustion engines, comprising a pump housing and a supply quantity adjusting member adjustable by an electrically controlled final control element, said supply quantity adjusting member having a profiled governor rod supported in said pump housing, said rod further having an end arranged to extend out of the pump housing toward the final control element, a cylindrical slide bearing sheath secured in said pump housing in proximity to said profiled governor rod, and a displaceably disposed cylindrical governor rod guide means and secured to said profiled governor rod to close off said governor rod in a sealing manner relative to said cylindrical slide bearing sheath and to the final control element to thereby achieve the least possible radial play in the slide bearing sheath to prevent an overflow of oil from said pump housing to the final control element, said governor rod guide means comprises a bolt-like cylindrical guide section of a supporting shaft secured on an end nearer the final control element of the profiled governor rod and that the slide bearing sheath has a tilt-proof minimal axial length and is embodied by a bottom part, protruding inward toward the guide section, of a closure cap secured at the point where the profiled governor rod emerges from the pump housing, and said supporting shaft has a radially protruding annular collar on an end of its guide section nearer the governor rod, which in one terminal stop position of the profiled governor rod shifted with respect to the final control element rests on a ring seal secured in the vicinity of the transition from the closure cap to the slide bearing sheath and additionally seals off an interior of the pump housing which interior receives the profiled governor rod with respect to the final control element.

Claim 9

A fuel injection pump as defined by claim 3, further wherein said cardan coupling comprises coupling elements arranged to offstand radially from said supporting shaft, said coupling elements arranged to rest on at least said one end face of said guide ring, and further having a coupler disc seated upon said supporting shaft, said coupler disc arranged to rest on said other end face of the guide ring, and further that said coupler disc is clamped against said guide ring by a support ring positioned on said supporting shaft.

Claim 10

A fuel injection pump as defined by claim 5, further wherein said coupler disc includes a sealing zone arranged to rest in an annular groove on said supporting shaft and further that said sealing zone rests on an annular shoulder, axially defining said annular groove, of said supporting shaft.

Claim 11

A fuel injection pump as defined by claim 5, further wherein said coupler elements comprise an annular protrusion of said supporting shaft.

Claim 12

A fuel injection pump as defined by claim 5, further wherein said coupler elements further include a transverse pin having protruding end portions and said supporting shaft further includes a transverse bore, said end portions arranged to protrude from said bore.

Claim 13

A fuel injection pump as defined by claim 8, further wherein said supporting shaft has an axis and said transverse pin is cardan supported therein.

Claim 14

A fuel injection pump as defined by claim 9, further wherein said transverse bore has a wall and said transverse pin rests on a very narrow annular rib standing away from said bore wall in the center of said transverse bore and said transverse pin further arranged to rest loosely, with radial play, in the area remaining in said transverse bore.

Claim 15

A fuel injection pump as defined by claim 8, further wherein said coupler disc and said protruding end portions of said transverse pin rest on opposite flanks of an annular rib which protrude from the said guide ring toward said supporting shaft and further that said coupler disc is clamped on said supporting shaft against said annular rib by means of a snap ring and a support ring disposed between said snap ring and said coupler disc.

Claim 16

A fuel injection pump as defined by claim 5, further wherein said supporting shaft is arranged to receive a slide bearing sheath provided with a central passageway opening, and further that the length of said slide bearing sheath is dimensioned such that in one end position of the profiled governor rod said coupler disc seals off a passageway opening in said slide bearing sheath.

Claim 17

A fuel injection pump as defined by claim 11, further wherein said slide bearing sheath is secured by means of a sleeve-nut-like cap into said pump housing said cap further having a central passageway opening for said supporting shaft, and further that said cap has a length which is dimensioned so that in one end position (stop position) of said profiled governor rod said coupler disc covers said passageway opening.

Claim 18

A fuel injection pump as defined by claim 1, characterized in that the governor rod guide means comprises a bolt-like cylindrical guide section of a supporting shaft secured on an end nearer the final control element of the profiled governor rod and that the slide bearing sheath has a tilt-proof minimal axial length and is embodied by a bottom part, protruding inward toward the guide section, of a closure cap secured at the point where the profiled governor rod emerges from the pump housing.