Automatic transmission shift control engine spark control

Claim 2

An engine ignition timing control comprising in combination, an engine timing system that is advanced and retarded as a function of the increase and decrease respectively of carburetor spark port vacuum applied thereto, and on-off valve means controlling the application of spark port vacuum as a function of the establishment or disestablishment of a particular gear ratio of a transmission that is drive connected to the engine, the transmission having a number of fluid pressure actuated servos operable to establish low, intermediate and high speed gear ratios, and first and second means responsive to the establishment of one speed gear ratio and the disestablishment of a second gear ratio to effect actuation of the valve means to an on position, and including a first fluid pressure actuated means actuated in response to the one gear ratio servo apply line pressure applied thereto, and second position actuated means actuated in response to movement of the second gear ratio establishing and disestablishing servo to a position disestablishing the second gear ratio, and means connecting the first and second means in a series power flow relationship to the valve means.

Claim 3

An engine timing as in claim 1, the first and second means being responsive to the establishment of a hIgh speed gear ratio and the disestablishment of the intermediate speed gear ratio to actuate the on-off valve means.

Claim 4

An engine timing control as in claim 2, the intermediate gear ratio servo including a piston movable in opposite directions by fluid pressure applied thereto to apply or disengage respectively a gear engaging member, spring means biasing the servo towards a disengaged position, the position actuated means being engaged and actuated by the piston upon movement thereof to the disengaged position.

Claim 5

A timing control as in claim 3, the fluid pressure actuated switch being actuated by the same fluid pressure actuating the high gear ratio servo.

Claim 6

An engine timing control as in claim 3, the on-off valve means being electrically actuated to an on position in response to concurrent actuation of the fluid pressure and position actuated means, the latter including a pair of switches in series flow circuit arrangement with the on-off valve means.

Claim 7

An engine ignition timing regulator controlled to advance or retard the timing as a function of the establishment/disestablishment of a particular gear ratio of a transmission that is drive connected to the engine, the transmission having a plurality of interconnected planetary gear sets each having drive, driven and reaction members, brake and clutch friction engaging means operatively engagable with selective ones of said members at times to alternately establish low, intermediate and high speed gear ratios, fluid pressure actuated servo means operatively engagable with the brake and clutch means for actuating the same and including first intermediate and second high speed gear ratio establishing/disestablishing servos, the servos being biased to a gear ratio disengaged position, the first intermediate servo having piston means movable in a friction means engaging direction by fluid pressure to establish intermediate gear speed ratio and movable in the opposite direction to disengage the intermediate speed gear ratio by fluid pressure simultaneously moving the second high speed servo to effect establishment of the high speed gear ratio, movable means to adjust the engine timing, a third vacuum controlled servo having a plunger operatively connected to the movable means and movable by spring means therein to a position retarding the ignition timing and movable by vacuum connected thereto from a carburetor induction passage port located above the closed position of a throttle valve therein to advance the ignition timing as a function of the movement of the throttle valve, a normally closed open-closed valve in the connection between the carburetor vacuum port and the third servo controlling vacuum flow therebetween, and electrically controlled means to actuate the valve to an open position, an electrical circuit including a first fluid pressure actuated switch and a second servo piston position switch arranged in a series power flow in the second servo, the first switch being moved to bridge the circuit by the attainment of a predetermined level of the servo apply fluid pressure applied thereagainst, the second switch being actuated to bridge the circuit by movement of the second servo piston thereagainst upon movement of the latter piston in the opposite intermediate gear speed ratio disestablishing direction.

Claim 8

An engine ignition timing regulator controlled to advance or retard the timing as a function of the establishment/disestablishment of a particular gear ratio of a transmission that is drive connected to the engine, the transmission having a plurality of interconnected planetary gear sets each having drive, driven and reaction members, brake and clutch friction engaging means operatively engagable with selective ones of said members at times to alternately establish low, intermediate and high speed gear ratios, fluid pressure actuated servo means operatively engagable with the brake and clutch means for actuating the same and including first intermediate and second high speed gear ratio establishing/disestablishing servos, the servos being biased to a gear ratio disengaged position, the first intermediate servo having piston means movable in a friction means engaging direction by fluid pressure to establish intermediate gear speed ratio and movable in the opposite direction to disengage the intermediate speed gear ratio by fluid pressure simultaneously moving the second high speed servo to effect establishment of the high speed gear ratio, movable means to adjust the engine timing, a third vacuum controlled servo having a plunger operatively connected to the movable means and movable by spring means therein to a position retarding the ignition timing and movable by vacuum connected thereto from a carburetor induction passage port located above the closed position of a throttle valve therein to advance the ignition timing as a function of the movement of the throttle valve, a normally closed open-closed valve in the connection between the carburetor vacuum port and the third servo controlling vacuum flow therebetween, and electrically controlled means to actuate the valve to an open position, an electrical circuit including a first fluid pressure actuated switch and a second servo piston position switch arranged in a series power flow in the second servo, the first switch being moved to bridge the circuit by the attainment of a predetermined level of the servo apply fluid pressure applied thereagainst, the second switch being actuated to bridge the circuit by movement of the second servo piston thereagainst upon movement of the latter piston in the opposite intermediate gear speed ratio disestablishing direction.