US3799008A — Throttle controlled by transmission ratio

Claim 1

Independent Claim 450 words

In combination with an internal combustion engine having an induction passage for air flow to the engine; a throttle in said induction passage for controlling air flow theretHrough; said throttle having at least fast and slow idle positions; a throttle lever connected to said throttle for controlling the position thereof and having a spring associated therewith to normally bias the throttle lever in a direction to move the throttle toward the slow idle position; an associated transmission with an input connected to said engine and an output connected to a load and with variable ratio drive means driving said output from said input; a throttle control unit for controlling the position of said throttle between said fast idle position and said slow idle position; conduit means including a valve means, controlled by said transmission drive mode, connected at one end to said induction passage upstream of said throttle when said throttle is in a closed position and downstream of said throttle when said throttle is open and at its other end to said throttle control unit for selectively transmitting vacuum signals from said induction passage to said throttle control unit and venting said throttle control unit to the atmosphere as a function of said valve means; said throttle control unit including a housing means; an actuator tube means slidably mounted therein with one end thereof extending from one end of said housing for engagement with said throttle lever and its other end slidably journalled in said other end of said housing means; a diaphragm mounted within said housing means in position to sealingly engage said actuator tube means to form with said housing a first chamber and a second chamber, said actuator being operatively connected to said diaphragm; an orifice in said housing for venting said second chamber to the atmosphere; passage means including at least one orifice passage of predetermined size in said actuator tube means in communication at one end with said first chamber and at its other end with said conduit means; spring means positioned in said second chamber and operatively connected to said actuator to normally bias said actuator and said diaphragm toward an extended position; said valve means including a first passage in communication with said induction passage and a second passage in communication with the atmosphere; and a valve element movable from a first position to permit the transmission of vacuum signals from said induction passage to said first chamber, to a second position to block the flow of vacuum signals from said induction passage and to place said first chamber of said control valve unit in communication with the atmosphere with fluid flow therebetween controlled through said orifice passage at a controlled rate.

Claim 2

Dependent Claim 450 words

In combination with an internal combustion engine having an induction passage for air flow to the engine; a throttle in said induction passage for controlling air flow theretHrough; said throttle having at least fast and slow idle positions; a throttle lever connected to said throttle for controlling the position thereof and having a spring associated therewith to normally bias the throttle lever in a direction to move the throttle toward the slow idle position; an associated transmission with an input connected to said engine and an output connected to a load and with variable ratio drive means driving said output from said input; a throttle control unit for controlling the position of said throttle between said fast idle position and said slow idle position; conduit means including a valve means, controlled by said transmission drive mode, connected at one end to said induction passage upstream of said throttle when said throttle is in a closed position and downstream of said throttle when said throttle is open and at its other end to said throttle control unit for selectively transmitting vacuum signals from said induction passage to said throttle control unit and venting said throttle control unit to the atmosphere as a function of said valve means; said throttle control unit including a housing means; an actuator tube means slidably mounted therein with one end thereof extending from one end of said housing for engagement with said throttle lever and its other end slidably journalled in said other end of said housing means; a diaphragm mounted within said housing means in position to sealingly engage said actuator tube means to form with said housing a first chamber and a second chamber, said actuator being operatively connected to said diaphragm; an orifice in said housing for venting said second chamber to the atmosphere; passage means including at least one orifice passage of predetermined size in said actuator tube means in communication at one end with said first chamber and at its other end with said conduit means; spring means positioned in said second chamber and operatively connected to said actuator to normally bias said actuator and said diaphragm toward an extended position; said valve means including a first passage in communication with said induction passage and a second passage in communication with the atmosphere; and a valve element movable from a first position to permit the transmission of vacuum signals from said induction passage to said first chamber, to a second position to block the flow of vacuum signals from said induction passage and to place said first chamber of said control valve unit in communication with the atmosphere with fluid flow therebetween controlled through said orifice passage at a controlled rate.

Claim 3

Dependent Claim 419 words

A throttle control mechanism for an internal combustion engine having an induction passage with a throttle therein for controlling air flow for combustion in the engine, and a throttle lever connected to the throttle, the throttle lever having a spring operatively connected thereto to normally bias the throttle lever in a direction to move the throttle toward a closed position, said engine further having an associated transmission with an input connected to the engine and an output connected to a load and variable ratio drive means driving the output from the input, the variable ratio drive means providing high and low drive ratios and reverse, said throttle control comprising a housing, a diaphragm and an actuator positioned to form with said housing a first chamber and a second chamber, said actuator being operatively connected to and extending through said diaphragm and being slidably journalled in said housing for movement between a retracted position and an extended position corresponding to throttle slow idle and fast idle positions, respectively, in a path followed by the throttle lever in moving the throttle to these positions, respectively, spring means positioned in said second chamber to normally bias said actuator and said diaphragm toward said extended position while permitting retraction of said actuator by said throttle lever while abutting against said actuator and when the pressure in saiD first chamber and said second chamber are approximately equal, said actuator being adapted to be retained in the extended position when vacuum signals are applied to said first chamber whereby said actuator will act as a movable stop to thereby limit throttle closing to a fast idle position by engagement of throttle lever against said actuator, a conduit connected between said first chamber and said induction passage at a location upstream of said throttle when said throttle is in a closed position and downstream of said throttle when said throttle is open for the transmission of vacuum signals to said first chamber, said conduit including passage means in said actuator terminating in at least one orifice of predetermined size in communication with said first chamber, valve means in said conduit movable between a closed position wherein flow of vacuum signals is prevented and said passage means are placed in communication with the atmosphere and an open position wherein transmission of vacuum signals is permitted, valve operating means connected to said valve means and operatively connected to said transmission to control movement of said valve means as a function of the drive ratios provided by said transmission.

Claim 4

Dependent Claim 419 words

A throttle control mechanism for an internal combustion engine having an induction passage with a throttle therein for controlling air flow for combustion in the engine, and a throttle lever connected to the throttle, the throttle lever having a spring operatively connected thereto to normally bias the throttle lever in a direction to move the throttle toward a closed position, said engine further having an associated transmission with an input connected to the engine and an output connected to a load and variable ratio drive means driving the output from the input, the variable ratio drive means providing high and low drive ratios and reverse, said throttle control comprising a housing, a diaphragm and an actuator positioned to form with said housing a first chamber and a second chamber, said actuator being operatively connected to and extending through said diaphragm and being slidably journalled in said housing for movement between a retracted position and an extended position corresponding to throttle slow idle and fast idle positions, respectively, in a path followed by the throttle lever in moving the throttle to these positions, respectively, spring means positioned in said second chamber to normally bias said actuator and said diaphragm toward said extended position while permitting retraction of said actuator by said throttle lever while abutting against said actuator and when the pressure in saiD first chamber and said second chamber are approximately equal, said actuator being adapted to be retained in the extended position when vacuum signals are applied to said first chamber whereby said actuator will act as a movable stop to thereby limit throttle closing to a fast idle position by engagement of throttle lever against said actuator, a conduit connected between said first chamber and said induction passage at a location upstream of said throttle when said throttle is in a closed position and downstream of said throttle when said throttle is open for the transmission of vacuum signals to said first chamber, said conduit including passage means in said actuator terminating in at least one orifice of predetermined size in communication with said first chamber, valve means in said conduit movable between a closed position wherein flow of vacuum signals is prevented and said passage means are placed in communication with the atmosphere and an open position wherein transmission of vacuum signals is permitted, valve operating means connected to said valve means and operatively connected to said transmission to control movement of said valve means as a function of the drive ratios provided by said transmission.

Claim 5

Dependent Claim 231 words

A throttle control for an internal combustion engine having an induction passage with a throttle movable therein by a throttle lever between open, fast idle and slow idle positions to vary engine speed and spring means associated with the throttle lever to normally bias the throttle to the slow idle position, said throttle control comprising an actuator adapted to engage the throttle lever between fast idle and slow idle positions to control its movement therebetween a housing, a flexible diaphragm dividing said housing into atmospheric and vacuum chambers, said actuator being operatively connected to and extending through said diaphragm and reciprocably journalled in opposite ends of said housing with one end of said actuator extending out from said housing for abutting engagement with the throttle lever, sealing means in opposite ends of said housing in sealing engagement with said actuator, means positioned in said atmospheric chamber biasing said diaphragm and said one end of said actuator in a direction toward the throttle fast idle position of the throttle lever, inlet means extending to said vacuum chamber and, means connected to said induction passage to apply engine vacuum to said vacuum chamber to effect movement to and hold said actuator at the fast idle position, said means including transmission controlled means to interrupt engine vacuum to said vacuum chamber and to vent said vacuum chamber to the atmosphere at a controlled rate.

Claim 6

Dependent Claim 231 words

A throttle control for an internal combustion engine having an induction passage with a throttle movable therein by a throttle lever between open, fast idle and slow idle positions to vary engine speed and spring means associated with the throttle lever to normally bias the throttle to the slow idle position, said throttle control comprising an actuator adapted to engage the throttle lever between fast idle and slow idle positions to control its movement therebetween a housing, a flexible diaphragm dividing said housing into atmospheric and vacuum chambers, said actuator being operatively connected to and extending through said diaphragm and reciprocably journalled in opposite ends of said housing with one end of said actuator extending out from said housing for abutting engagement with the throttle lever, sealing means in opposite ends of said housing in sealing engagement with said actuator, means positioned in said atmospheric chamber biasing said diaphragm and said one end of said actuator in a direction toward the throttle fast idle position of the throttle lever, inlet means extending to said vacuum chamber and, means connected to said induction passage to apply engine vacuum to said vacuum chamber to effect movement to and hold said actuator at the fast idle position, said means including transmission controlled means to interrupt engine vacuum to said vacuum chamber and to vent said vacuum chamber to the atmosphere at a controlled rate.

Claim 7

Dependent Claim 62 words

A throttle control according to claim 3 wherein said inlet means includes an inlet in said housing in communication with orifice passage means in said actuator, said orifice passage means including an axial passage in the other end of said actuator from said one end and at least one intersecting radial orifice passage, of predetermined size, in communication with said vacuum chamber.

Claim 8

Dependent Claim 81 words

A throttle control according to claim 3 wherein said means connected to said induction passage to apply engine vacuum to said vacuum chamber is connected to said induction passage at a location upstream of said throttle when said throttle is in a closed position and downstream of said throttle when said throttle is in open position whereby engine vacuum is supplied to said vacuum chamber only when said throttle is open and said transmission is operative in a high drive ratio.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-03-25	1977-09-24	1978-03-26	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-03-25	1981-09-24	1982-03-26	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-03-25	1985-09-24	1986-03-26	$7700.00	Window Closed / Lapsed

Throttle controlled by transmission ratio

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