Three position solenoid idle stop

Claim 2

A three position actuator comprising: a member reciprocable along a selected axis; means biasing said reciprocable member against movement in one direction along the axis; a first extension secured to the reciprocable member, said first extension being axially adjustable with respect to the reciprocable member; an armature reciprocable along the axis; a second extension secured to the armature, said second extension being non-magnetically responsive, axially adjustable with respect to the armature and disposed so as to be capable of pushing and being pushed by the first extension; a coil energizable to cause movement of the armature in the one direction, whereby said armature moves the first extension, reciprocable member and second extension in the one direction; first stop means for limiting movement of the armature in the one direction; actuating means to cause further movement of the reciprocable member in the one direction whereby said reciprocable member moves the first extension in the one direction; and second stop means for limiting movement of the reciprocable member in the one direction.

Claim 3

In combination with an internal combustion engine having an ignition system, an induction passage for air flow to the engine, a throttle in said induction passage for controlling air flow therethrough, said throttle having fast idle, intermediate idle and off positions, a throttle lever connected to said throttle for controlling the position thereof, and 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, said variable ratio drive means providing high and low drive ratios wherein said low drive ratio reduces the speed of the output from the speed of the input to a greater extent than said high drive ratio, a throttle position control unit comprising: a hollow elongated housing; a member reciprocably disposed within said housing; a stop member carried by the reciprocable member, said stop member being adjustable with respect to the reciprocable member and engageable with the throttle lever for controlling the idle position of the throttle; an arMature reciprocably disposed within the housing; an extension carried by the armature, said extension being axially adjustable with respect to the armature, non-magnetically responsive and disposed so as to be capable of pushing and being pushed by the stop member; a coil adjacent the armature; switch means energizing said coil when the engine ignition system is operating to cause movement of the armature, extension, reciprocable member and stop member toward the throttle lever to prevent closure of the throttle past the intermediate idle position; first stop means for limiting movement of the armature towards the throttle; actuating means operable when said high drive ratio is operative to cause movement of the reciprocable member and stop member toward the throttle lever to thereby prevent closure of the throttle beyond the fast idle position; second stop means for limiting movement of the reciprocable member towards the throttle; and a spring which is effective upon deactivation of the actuating means to move the stop member and reciprocable member in a throttle closing direction to permit closure of the throttle to its intermediate position and which is effective upon deenergization of the coil to move the stop member, reciprocable member, extension and armature in a throttle closing direction to permit closure of the throttle to its off position.

Claim 4

In combination with an internal combustion engine having an ignition system, an induction passage for air flow to the engine, a throttle in said induction passage for controlling air flow therethrough, said throttle having fast idle, intermediate idle and off positions, a throttle lever connected to said throttle for controlling the position thereof, and 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, said variable ratio drive means providing high and low drive ratios wherein said low drive ratio reduces the speed of the output from the speed of the input to a greater extent than said high drive ratio, a throttle position control unit comprising: a hollow elongated housing; a member reciprocably disposed within said housing; a stop member carried by the reciprocable member, said stop member being adjustable with respect to the reciprocable member and engageable with the throttle lever for controlling the idle position of the throttle; an arMature reciprocably disposed within the housing; an extension carried by the armature, said extension being axially adjustable with respect to the armature, non-magnetically responsive and disposed so as to be capable of pushing and being pushed by the stop member; a coil adjacent the armature; switch means energizing said coil when the engine ignition system is operating to cause movement of the armature, extension, reciprocable member and stop member toward the throttle lever to prevent closure of the throttle past the intermediate idle position; first stop means for limiting movement of the armature towards the throttle; actuating means operable when said high drive ratio is operative to cause movement of the reciprocable member and stop member toward the throttle lever to thereby prevent closure of the throttle beyond the fast idle position; second stop means for limiting movement of the reciprocable member towards the throttle; and a spring which is effective upon deactivation of the actuating means to move the stop member and reciprocable member in a throttle closing direction to permit closure of the throttle to its intermediate position and which is effective upon deenergization of the coil to move the stop member, reciprocable member, extension and armature in a throttle closing direction to permit closure of the throttle to its off position.

Claim 5

The combination of claim 2 in which the actuating means includes a solenoid.

Claim 6

The combination of claim 2 in which the actuating means includes an expansible chamber motor.