Throttle control device

Claim 2

A throttle control device for controlling the operation of the throttle valve of an engine to regulate the air flow into the induction passage in the intake manifold of the engine, the throttle control device including an accelerator rod actuated at one end by an accelerator pedal, a throttle rod axially aligned with said accelerator rod and operatively connected at one end to said throttle valve, a pneumatic power unit having a housing divided into first and second chambers by a movable wall, said housing being fixed on its second chamber side to the opposite end of said accelerator rod, said throttle rod slidably extending through said housing and said first chamber and being operatively connected at its end opposite said throttle valve to said movable wall for movement therewith, free flow passage means, including a flexible portion, connecting said first chamber to said induction passage in said intake manifold and, flow restricted passage means connecting said second chamber in communication with said first chamber.

Claim 3

A throttle control device according to claim 1 wherein said movable wall of said pneumatic power unit is a flexible diaphragm fixed at its outer periphery to saiD housing and wherein said pneumatic power unit includes a pair of coiled springs positioned in said housing, one of said coiled springs on each side of said diaphragm in abutment thereagainst to normally bias said diaphragm to a neutral position within said housing.

Claim 4

A throttle control device for controlling the operation of the throttle valve of a carburetor on an engine to regulate the air-fuel flow to the induction passage in the intake manifold of the engine, the throttle control device including a throttle rod operatively connected at one end to said throttle valve, a pneumatic power unit including a housing having a diaphragm mounted therein to form with said housing a first chamber and a second chamber, a manually operated, axial movable accelerator rod positioned axially in alignment with said throttle rod and fixed at one end adjacent to said throttle rod to said housing on the second chamber side of said housing, the other end of said throttle rod slidably extending through the opposite side of said housing and being fixed to said diaphragm, first spring means and second spring means positioned in said housing in said first chamber and said second chamber, respectively, to normally bias said diaphragm to a neutral position within said housing and conduit means, inclusing a flexible hose portion, connecting said first chamber and said second chamber to said induction passage, said conduit means further including a fluid flow restriction to restrict fluid flow between said second chamber and said induction passage.

Claim 5

A throttle control device for controlling the operation of the throttle valve of a carburetor on an engine to regulate the air-fuel flow to the induction passage in the intake manifold of the engine, the throttle control device including a throttle rod operatively connected at one end to said throttle valve, a pneumatic power unit including a housing having a diaphragm mounted therein to form with said housing a first chamber and a second chamber, a manually operated, axial movable accelerator rod positioned axially in alignment with said throttle rod and fixed at one end adjacent to said throttle rod to said housing on the second chamber side of said housing, the other end of said throttle rod slidably extending through the opposite side of said housing and being fixed to said diaphragm, first spring means and second spring means positioned in said housing in said first chamber and said second chamber, respectively, to normally bias said diaphragm to a neutral position within said housing and conduit means, inclusing a flexible hose portion, connecting said first chamber and said second chamber to said induction passage, said conduit means further including a fluid flow restriction to restrict fluid flow between said second chamber and said induction passage.

Claim 6

In combination with the throttle valve and intake manifold of an internal combustion engine and a manually accelerator pedal operated, axial movable accelerator rod, a pneumatic power unit housing fixed at one end to said accelerator rod opposite said accelerator pedal, a flexible diaphragm centrally mounted in said housing and forming with said housing a first chamber and a second chamber with said second chamber on said one end of said housing, a throttle rod fixed at one end to said flexible diaphragm and slidably and sealingly extending through the opposite side of said housing in axial alignment with said accelerator and being operatively connected at its opposite end to said throttle valve, conduit means including a flexible conduit connecting said intake manifold to said first chamber and to said second chamber, said conduit means further including a flow orifice closely adjacent to said second chamber to restrict fluid flow between said intake manifold and said second chamber.

Claim 7

In combination with the throttle valve and intake manifold of an internal combustion engine and a manually accelerator pedal operated, axial movable accelerator rod, a pneumatic power unit housing fixed at one end to said accelerator rod opposite said accelerator pedal, a flexible diaphragm centrally mounted in said housing and forming with said housing a first chamber and a second chamber with said second chamber on said one end of said housing, a throttle rod fixed at one end to said flexible diaphragm and slidably and sealingly extending through the opposite side of said housing in axial alignment with said accelerator and being operatively connected at its opposite end to said throttle valve, conduit means including a flexible conduit connecting said intake manifold to said first chamber and to said second chamber, said conduit means further including a flow orifice closely adjacent to said second chamber to restrict fluid flow between said intake manifold and said second chamber.

Claim 8

In the combination of claim 4 further including first spring means and second spring means positioned in said housing on opposite sides of said diaphragm to normally bias said diaphragm to a neutral position in the center of said housing.