PLANETARY TRANSMISSION WITH LAUNCH CLUTCH
First Claim
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1. A transmission for a vehicle, the transmission comprising:
- an input member;
an output member;
a plurality of planetary gear sets each having a first, a second, and a third member;
a launch clutch selectively engageable to connect the input member with an engine output of the vehicle;
a plurality of torque transmitting devices each selectively engageable to connect at least one of the first, second, and third members of at least one of the plurality of planetary gear sets with at least one other of a stationary member and the first, second, and third members of at least one of the plurality of planetary gear sets;
a plurality of actuators, wherein each of the plurality of actuators includes a cylinder and a piston that is translatable to actuate one of the launch clutch and at least one of the plurality of torque transmitting devices, and wherein the piston of each of the plurality of actuators is substantially rotationally stationary with respect to the cylinder, and wherein a first of the plurality of actuators is configured to selectively actuate the launch clutch;
an apply through bearing disposed between the first of the plurality of actuators and the launch clutch; and
a sealed hydraulic control system in fluid communication with the plurality of actuators, andwherein the plurality of actuators and the plurality of torque transmitting devices are selectively engageable to establish a plurality of forward speed ratios and at least one reverse speed ratio between the launch clutch and the output member.
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Accused Products
Abstract
A transmission system is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members a plurality of torque transmitting devices, a launch clutch, and a hydraulic circuit. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.
101 Citations
22 Claims
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1. A transmission for a vehicle, the transmission comprising:
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an input member; an output member; a plurality of planetary gear sets each having a first, a second, and a third member; a launch clutch selectively engageable to connect the input member with an engine output of the vehicle; a plurality of torque transmitting devices each selectively engageable to connect at least one of the first, second, and third members of at least one of the plurality of planetary gear sets with at least one other of a stationary member and the first, second, and third members of at least one of the plurality of planetary gear sets; a plurality of actuators, wherein each of the plurality of actuators includes a cylinder and a piston that is translatable to actuate one of the launch clutch and at least one of the plurality of torque transmitting devices, and wherein the piston of each of the plurality of actuators is substantially rotationally stationary with respect to the cylinder, and wherein a first of the plurality of actuators is configured to selectively actuate the launch clutch; an apply through bearing disposed between the first of the plurality of actuators and the launch clutch; and a sealed hydraulic control system in fluid communication with the plurality of actuators, and wherein the plurality of actuators and the plurality of torque transmitting devices are selectively engageable to establish a plurality of forward speed ratios and at least one reverse speed ratio between the launch clutch and the output member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A transmission for a vehicle, the transmission comprising:
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an input member; an output member; a first and a second planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a first rotary member, a second rotary member, a third rotary member, and a fourth rotary member, and wherein two of the members of the first planetary gear set are directly separately connected with two of the members of the second planetary gear set to form the first and the second rotary members; a third and a fourth planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a fifth rotary member, a sixth rotary member, a seventh rotary member, and an eighth rotary member, and wherein two of the members of the third planetary gear set are directly separately connected with two of the members of the fourth planetary gear set to form the fifth and sixth rotary members and wherein the sixth rotary member is directly connected to the output member; a launch clutch selectively engageable to connect the input member with an engine output shaft of the vehicle, wherein the launch clutch is a friction clutch that substantially rotationally couples the input member with the engine output shaft; a launch clutch actuator having a piston that is translatable to actuate the launch clutch; an interconnecting member continuously connected to the first rotary member and the seventh rotary member; a first torque transmitting device selectively engageable to connect the fourth rotary member with the fifth rotary member; a first actuator having a piston that is translatable to actuate the first torque transmitting device; a second torque transmitting device selectively engageable to connect the fourth rotary member with the eighth rotary member; a second actuator having a piston that is translatable to actuate the second torque transmitting device; a third torque transmitting device selectively engageable to connect the third rotary member with a stationary member; a third actuator having a piston that is translatable to actuate the third torque transmitting device; a fourth torque transmitting device selectively engageable to connect the second rotary member with the stationary member; a fourth actuator having a piston that is translatable to actuate the fourth torque transmitting device; a fifth torque transmitting device selectively engageable to connect the first rotary member, the interconnecting member, and the seventh rotary member with the stationary member; a fifth actuator having a piston that is translatable to actuate the fifth torque transmitting device; a sixth torque transmitting device selectively engageable to connect the fifth rotary member with the stationary member; and a sixth actuator having a piston that is translatable to actuate the sixth torque transmitting device, and wherein the actuators and torque transmitting devices are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification