Dual clutch transmission having area controlled clutch cooling circuit
First Claim
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1. A dual clutch transmission (10) having a hydraulic circuit (110) for controlling and cooling the clutches (32, 34) of the dual clutch transmission, said dual clutch transmission (10) comprising:
- said hydraulic circuit (110) having a source o pressurized cooling fluid (112);
first and second lube valves (116, 118) in fluid communication with said source of pressurized fluid (112), each of said first and second lube valves including a lube valve body (218) and a lube valve member (220) movably supported in said lube valve body to selectively and independently provide a flow of cooling fluid to each of the clutches (32, 34) of the dual clutch transmission with each of said lube valves (116, 118) including a biasing member (225) that acts on said lube valve member (220) to bias it to a normally closed position; and
first and second control actuators (120, 122) at fluid communication with a corresponding one of said first and second lube valves (116, 118) and adapted to selectively control said first and second lube valves, each of said first and second control actuators in fluid communication with said source of pressurized cooling fluid (112) and including an actuator valve body (226), an actuator valve member (228) movably supported by said actuator valve body and a solenoid (230), said solenoid adapted to move said actuator valve member (228) of said control actuator to produce a signal pressure that is an inverse function of the current delivered to said solenoid (230) and to deliver a predetermined control signal pressure to each of said lube valve members (220) of said first and second lube valves (116, 118) to move said lube valve members against the bias of said biasing member (225) to selectively open said first and second lube valves thereby delivering a controlled, predetermined amoral, of cooling fluid to the clutches (32, 34) of the dual clutch transmission (10).
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Abstract
A dual clutch transmission having a hydraulic circuit for controlling and cooling the clutches of a dual clutch transmission having lube valves in fluid communication with a source of pressurized fluid and wherein the cooling flow is controlled by a solenoid which is adapted to move a valve member to produce a flow area through the valve that is an inverse function of the current delivered to the solenoid and so as to deliver a predetermined control solenoid pressure ultimately to each of the clutches of a dual clutch transmission.
158 Citations
20 Claims
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1. A dual clutch transmission (10) having a hydraulic circuit (110) for controlling and cooling the clutches (32, 34) of the dual clutch transmission, said dual clutch transmission (10) comprising:
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said hydraulic circuit (110) having a source o pressurized cooling fluid (112); first and second lube valves (116, 118) in fluid communication with said source of pressurized fluid (112), each of said first and second lube valves including a lube valve body (218) and a lube valve member (220) movably supported in said lube valve body to selectively and independently provide a flow of cooling fluid to each of the clutches (32, 34) of the dual clutch transmission with each of said lube valves (116, 118) including a biasing member (225) that acts on said lube valve member (220) to bias it to a normally closed position; and first and second control actuators (120, 122) at fluid communication with a corresponding one of said first and second lube valves (116, 118) and adapted to selectively control said first and second lube valves, each of said first and second control actuators in fluid communication with said source of pressurized cooling fluid (112) and including an actuator valve body (226), an actuator valve member (228) movably supported by said actuator valve body and a solenoid (230), said solenoid adapted to move said actuator valve member (228) of said control actuator to produce a signal pressure that is an inverse function of the current delivered to said solenoid (230) and to deliver a predetermined control signal pressure to each of said lube valve members (220) of said first and second lube valves (116, 118) to move said lube valve members against the bias of said biasing member (225) to selectively open said first and second lube valves thereby delivering a controlled, predetermined amoral, of cooling fluid to the clutches (32, 34) of the dual clutch transmission (10). - View Dependent Claims (2, 3, 4)
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5. A dual clutch transmission (10) having a hydraulic circuit (310) for controlling and cooling the clutches (32,34) of the dual clutch transmission, said dual clutch transmission (10) comprising:
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said hydraulic circuit (310) including a source of pressurized cooling fluid (112); first and second lube valves (316, 318) in fluid communication with said source of pressurized fluid (112), each of said first and second lube valves (316, 318) including a lube valve body (418) and a lube valve member (420) movably supported in said lube valve body to selectively and independently provide a flow of cooling fluid to each of the clutches 34, 34) dual clutch transmission with each of said lube valves including a biasing member (425) that acts on said lube valve member (420) to bias it to a normallv closed position and a solenoid (430), said solenoid adapted to move said lube valve, member (420) against the bias of said biasing member to produce a flow area through said lube valve that is an inverse function of the current delivered to said solenoid (430) to selectively open said first and second lube valves (316,318) thereby delivering a controlled, predetermined amount of cooling fluid to the clutches (32, 34) of the dual clutch transmission (10). - View Dependent Claims (6, 7, 8)
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9. A dual clutch transmission (10) having a hydraulic circuit (510) for controlling and cooling the clutches (32, 34) of the dual clutch transmission, said dual clutch transmission comprising:
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said hydraulic circuit (510) having a source of pressurized cooling fluid (112); a lube valve (516) in fluid communication with said source of pressurized fluid (112), said lube valve including a lube valve body (518) and a lube valve member (520) movably supported in said lube valve body (518) to selectively provide a flow of cooling fluid to the clutches (32, 34) of the dual clutch transmission, said lube valve (516) including a biasing member (625) that acts on said lube valve member (620) to bias it to a normally closed position; a control actuator (520) in fluid communication with said with valve (516) and adapted to selectively control said lube valve, said control actuator (520) in fluid communication with said source of pressurized cooling fluid (112) and including all an actuator valve body (626), an actuator valve member (628) movably supported by said actuator valve body (626) and a solenoid (630), said solenoid (630) adapted to move said actuator valve member (628) of said control actuator to produce a control signal pressure from said control actuator that is an inverse function of the current delivered to said solenoid (630) and to deliver a predetermined amount of pressurized fluid to said lube valve member of said tube valve (516) to move said lube valve member (520) against the bias of said biasing, member (625) to thereby deliver a controlled, predetermined amount of cooling fluid through said lube valve (516); and a cooling switch valve (523) in fluid communication with said valve (516), said cooling switch valve adapted to deliver a controlled, predetermined amount of cooling fluid received from said lube valve (516) to alternate ones of the clutches (32, 34) of a dual clutch transmission. - View Dependent Claims (10, 11, 12, 13)
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14. A dual clutch transmission (10) having a hydraulic circuit (810) for controlling and cooling the clutches (32, 34) of the dual clutch transmission, said dual clutch transmission comprising:
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said hydraulic circuit (810) including a source of pressurized cooling fluid (112); a lube valve(816) in fluid communication with said source of pressurized fluid (112), said lube valve including a lube vale body 818 and a lube valve member (820) movably supported in said lube valve body to selectively and independently provide a flow of cooling fluid to each of the clutches (32, 34) of the dual clutch transmission, said lube valve (816) further including a biasing member (925) the acts on said lube valve member (820) to bias it to a normally closed position and a solenoid (930), said solenoid adapted to move said lube valve member (820) against the bias of said biasing member (925) to produce a flow area through said lube valve that is an inverse function of the current delivered to said solenoid (930) to selectively open said lube valve (816); and a cooling switch valve (823) in fluid communication with said lube valve (816), said cooling switch valve (823) adapted to deliver a controlled, predetermined amount of cooling fluid received switch valve (823) adapted to deliver a controlled, predetermined amount of cooling fluid received from said lube valve (816) to alternate ones of the clutches (32, 34) of a dual clutch transmission. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification