Transmission and control with shift engagement timing devices

Claim 2

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first timing control means in series with said shift valve means and said second drive ratio establishing means and operatively connected in fluid communication with said first drive ratio establishing means for controlling the engagement time of said second drive ratio establishing means during the interchange from said first to said second drive ratio establishing means; and second timing control means in parallel with said first timing control means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive raTio establishing means interchange, and being operable to control the engagement time of said second drive ratio establishing means during the interchange from said third to second drive ratio establishing means; said first timing control means being inoperable during said third to second drive ratio establishing means interchange.

Claim 3

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first restriction means in series with said shift valve means and said second drive ratio establishing means; trimmer valve means for controlling pressure in said first drive ratio establishing means having a member connected in fluid communication with said source and said first restriction means for permitting fluid flow through said first restriction means during the interchange from said first to said second drive ratio establishing means and preventing fluid flow through said first restriction during a third to second drive ratio establishing means interchange; and second restriction means in parallel with said first restriction means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operable to control the engagement time of said second drive ratio establishing means during the interchange from said third to second drive ratio establishing means.

Claim 4

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first restriction means in series with said shift valve means and said second drive ratio establishing means; trimmer valve means for controlling pressure in said first drive ratio establishing means having a member connected in fluid communication with said source and said first restriction means for permitting fluid flow through said first restriction means during the interchange from said first to said second drive ratio establishing means and preventing fluid flow through said first restriction during a third to second drive ratio establishing means interchange; and second restriction means in parallel with said first restriction means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operable to control the engagement time of said second drive ratio establishing means during the interchange from said third to second drive ratio establishing means.

Claim 5

A transmission and control comprising in combination, multi-speed drive ratio means for providing low, intermediate and high drive ratios having a plurality of fluid operated means for controlling said drive ratios; a source of fluid pressure; shift valve means for selectively connecting said source with said fluid operated means; a pair of flow restriction means in parallel for controlling fluid flow between said source and said fluid operated means controlling said intermediate drive ratio; and pressure control means for controlling fluid pressure in one of said fluid operated means and including moveable means responsive to fluid pressure in said one of said fluid operated means for controlling flow to said flow restriction means for permitting flow through both said flow restriction means during a low to intermediate drive ratio interchange and for permitting flow through only one of said restriction means during a high to intermediate drive ratio interchange to control the engagement time of said intermediate ratio.

Claim 6

A transmission and control comprising in combination, multi-speed drive ratio means for providing low, intermediate and high drive ratios having a plurality of fluid operated means for controlling said drive ratios; a source of fluid pressure; shift valve means for selectively connecting said source with said fluid operated means; a pair of flow restriction means in parallel for controlling fluid flow between said source and said fluid operated means controlling said intermediate drive ratio; and pressure control means for controlling fluid pressure in one of said fluid operated means and including moveable means responsive to fluid pressure in said one of said fluid operated means for controlling flow to said flow restriction means for permitting flow through both said flow restriction means during a low to intermediate drive ratio interchange and for permitting flow through only one of said restriction means during a high to intermediate drive ratio interchange to control the engagement time of said intermediate ratio.

Claim 7

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first timing control means in series with said shift valve means and said second drive ratio establishing means and operatively connected in fluid communication with said first drive ratio establishing means for controlling the engagement time of said second drive ratio establishing means during the interchange from said first to said second drive ratio establishing means; second timing control means in parallel with said first timing control means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operAble to control the engagement time of said second drive ratio establishing means during the interchange from said third to second drive ratio establishing means; said first timing control means being inoperable during said third to second drive ratio establishing means interchange; and one way valve means for permitting free exhaust of said second drive ratio establishing means during the second ratio to first ratio interchange and the second ratio to third ratio interchange.

Claim 8

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first timing control means in series with said shift valve means and said second drive ratio establishing means and operatively connected in fluid communication with said first drive ratio establishing means for controlling the engagement time of said second drive ratio establishing means during the interchange from said first to said second drive ratio establishing means; second timing control means in parallel with said first timing control means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operAble to control the engagement time of said second drive ratio establishing means during the interchange from said third to second drive ratio establishing means; said first timing control means being inoperable during said third to second drive ratio establishing means interchange; and one way valve means for permitting free exhaust of said second drive ratio establishing means during the second ratio to first ratio interchange and the second ratio to third ratio interchange.

Claim 9

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first restriction means in series with said shift valve means and said second drive ratio establishing means; trimmer valve means for controlling pressure in said first drive ratio establishing means including a regulator valve means for controlling pressure in said first drive ratio establishing means and a valve member having a pair of spaced lands connected in fluid communication between said source and said first restriction means and being movable in response to fluid pressure regulated by the regulator valve means for said first drive ratio establishing means to one position to permit fluid flow between said lands to said first restriction means during the interchange from said first to said second drive ratio establishing means and being movable to another position to align one of said lands with flow from said source to prevent fluid flow to said first restriction during a third to second drive ratio establishing means interchange; and second restriction means in parallel with said first restriction means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operable to control the engagement time of said second drive ratio establishing means during the interchange from said third to second drive ratio establishing means.

Claim 10

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first restriction means in series with said shift valve means and said second drive ratio establishing means; trimmer valve means for controlling pressure in said first drive ratio establishing means including a regulator valve means for controlling pressure in said first drive ratio establishing means and a valve member having a pair of spaced lands connected in fluid communication between said source and said first restriction means and being movable in response to fluid pressure regulated by the regulator valve means for said first drive ratio establishing means to one position to permit fluid flow between said lands to said first restriction means during the interchange from said first to said second drive ratio establishing means and being movable to another position to align one of said lands with flow from said source to prevent fluid flow to said first restriction during a third to second drive ratio establishing means interchange; and second restriction means in parallel with said first restriction means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operable to control the engagement time of said second drive ratio establishing means during the interchange from said third to second drive ratio establishing means.

Claim 11

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first timing control means in series with said shift valve means and said second drive ratio establishing means for controlling the engagement time of said second drive ratio establishing means during the interchange from said first to said second drive ratio establishing means; trimmer valve means in fluid communication with said source and said first drive ratio establishing means including valve means having a pair of spaced lands and being movable to one position in response to fluid pressure in said first drive ratio establishing means to permit flow between said lands from said source to said first timing control means, and to another position when said first drive ratio establishing means is inoperative to align one of said lands between said source and said first timing control means to prevent fluid flow from said source to said first timing control means; second timing control means in parallel with said first timing control means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operable to control the engagement time of said second drive ratio establishing during the interchange from said third to second drive ratio establishing means; and one way valve means for permitting free exhaust of said second drive ratio establishing means during the second ratio to first ratio interchange and the second ratio to third ratio interchange.

Claim 12

A transmission and control comprising in combination, planetary gearing means; first, second and third fluid operated selectively operable drive ratio establishing means operatively connected with said planetary gearing means for selectively establishing first, second and third drive ratios therein; a source of fluid pressure; shift valve means in fluid communication with said source and said drive ratio establishing means for selectively engaging and disengaging said drive ratio establishing means; first timing control means in series with said shift valve means and said second drive ratio establishing means for controlling the engagement time of said second drive ratio establishing means during the interchange from said first to said second drive ratio establishing means; trimmer valve means in fluid communication with said source and said first drive ratio establishing means including valve means having a pair of spaced lands and being movable to one position in response to fluid pressure in said first drive ratio establishing means to permit flow between said lands from said source to said first timing control means, and to another position when said first drive ratio establishing means is inoperative to align one of said lands between said source and said first timing control means to prevent fluid flow from said source to said first timing control means; second timing control means in parallel with said first timing control means and cooperating therewith for controlling the engagement time of said second drive ratio establishing means during the first to second drive ratio establishing means interchange, and being operable to control the engagement time of said second drive ratio establishing during the interchange from said third to second drive ratio establishing means; and one way valve means for permitting free exhaust of said second drive ratio establishing means during the second ratio to first ratio interchange and the second ratio to third ratio interchange.

Claim 13

A transmission and control comprising in combination; multispeed drive ratio means for providing low, intermediate and high drive ratios and a plurality of fluid operated means selectively operated for establishing said drive ratios; a source of fluid pressure; shift valve means, including low, intermediate and high passage means connected to said fluid operated means, for selectively exhausting and connecting said source to said low, intermediate and high passage means and said fluid operated means to selectively disestablish and establish said low, intermediate and high drive ratios; variable flow restriction means in said intermediate passage means having a low and a high restriction position controlling the time of establishment of said intermediate drive ratio; trimmer regulator valve means operatively connected to another of said passage means having a normal position when said another of said passage means is conditioned to disestablish another drive ratio and operative in response to change of fluid pressure in said another of said passage means to variably regulate the pressure in said another of said passage means for gradual establishment of said another drive ratio while moving to a terminal position and to remain in said terminal position while said another drive ratio remains established and operative during disestablishment of said another drive ratio to slowly move from said terminal position to said normal position and operatively connected to said variable flow restriction means and responsive to said movement between said terminal and normal positions to provide said high restriction during a high to intermediate interchange and said low restriction during a low to intermediate interchange.

Claim 14

A transmission and control comprising in combination; multispeed drive ratio means for providing low, intermediate and high drive ratios and a plurality of fluid operated means selectively operated for establishing said drive ratios; a source of fluid pressure; shift valve means, including low, intermediate and high passage means connected to said fluid operated means, for selectively exhausting and connecting said source to said low, intermediate and high passage means and said fluid operated means to selectively disestablish and establish said low, intermediate and high drive ratios; variable flow restriction means in said intermediate passage means having a low and a high restriction position controlling the time of establishment of said intermediate drive ratio; trimmer regulator valve means operatively connected to another of said passage means having a normal position when said another of said passage means is conditioned to disestablish another drive ratio and operative in response to change of fluid pressure in said another of said passage means to variably regulate the pressure in said another of said passage means for gradual establishment of said another drive ratio while moving to a terminal position and to remain in said terminal position while said another drive ratio remains established and operative during disestablishment of said another drive ratio to slowly move from said terminal position to said normal position and operatively connected to said variable flow restriction means and responsive to said movement between said terminal and normal positions to provide said high restriction during a high to intermediate interchange and said low restriction during a low to intermediate interchange.

Claim 15

A transmission and control comprising in combination; multispeed drive ratio means for providing low, intermediate and high drive ratios and a plurality of fluid operated means selectively operated for establishing said drive ratios; a source of fluid pressure; shift valve means, including low, intermediate and high passage means connected to said fluid operated means, for selectively connecting said source to supply fluid to said low, intermediate and high passage means and said fluid operated means to selectively establish said low, intermediate and high drive ratios in a predetermined time period and selectively exhausting fluid from said low, intermediate and high passage means and said fluid operated means to selectively disestablish said low, intermediate and high drive ratios; variable flow restriction means in said intermediate passage means having a low and a high restriction position controlling the rate of flow to and the time of establishment of said intermediate drive ratio; trimmer regulator valve means operatively connected to another of said passage means having a normal position when said another of said passage means is exhausted to disestablish another drive ratio and operative in response to the supply of fluid pressure in said another of said passage means to regulate the pressure in said another of said passage means at gradually increasing pressures for gradual establishment of said another drive ratio while moving to a terminal position and to remain in said terminal position providing full pressure while said another drive ratio remains established and operative on exhaust of pressure in said another passage means for disestablishment of said another drive ratio to slowly move from said terminal position to said normal position in a time period at least as large as said predetermined time period for establishment of said intermediate ratio and operatively connected to said variable flow restriction means and responsive to said movement between said terminal and normal positions to provide said high restriction during a high to intermediate interchange and said low restriction during a low to intermediate interchange.

Claim 16

A transmission and control comprising in combination; multispeed drive ratio means for providing low, intermediate and high drive ratios and a plurality of fluid operated means selectively operated for establishing said drive ratios; a source of fluid pressure; shift valve means, including low, intermediate and high passage means connected to said fluid operated means, for selectively connecting said source to supply fluid to said low, intermediate and high passage means and said fluid operated means to selectively establish said low, intermediate and high drive ratios in a predetermined time period and selectively exhausting fluid from said low, intermediate and high passage means and said fluid operated means to selectively disestablish said low, intermediate and high drive ratios; variable flow restriction means in said intermediate passage means having a low and a high restriction position controlling the rate of flow to and the time of establishment of said intermediate drive ratio; trimmer regulator valve means operatively connected to another of said passage means having a normal position when said another of said passage means is exhausted to disestablish another drive ratio and operative in response to the supply of fluid pressure in said another of said passage means to regulate the pressure in said another of said passage means at gradually increasing pressures for gradual establishment of said another drive ratio while moving to a terminal position and to remain in said terminal position providing full pressure while said another drive ratio remains established and operative on exhaust of pressure in said another passage means for disestablishment of said another drive ratio to slowly move from said terminal position to said normal position in a time period at least as large as said predetermined time period for establishment of said intermediate ratio and operatively connected to said variable flow restriction means and responsive to said movement between said terminal and normal positions to provide said high restriction during a high to intermediate interchange and said low restriction during a low to intermediate interchange.