Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least seven forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets with two brakes, four clutches and three fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. The two brakes and four clutches provide interconnections between various gear members and with the transmission housing, the input or output shaft, and the three fixed interconnections, and are operated in combinations of two to establish at least seven forward speed ratios and one reverse speed ratio.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least seven forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets and six torque transmitting mechanisms. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. The six torque transmitting mechanisms provide interconnections between various gear members and with the transmission housing, the input or output shaft, in some instances, and are operated in combinations of two to establish at least seven forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets and four clutches. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the third planetary gear set and an output member that is continuously connected with another of the third planetary gear set. A member of the first planetary gear set is continuously connected with the transmission housing. The four clutches provide interconnections between various gear members, interconnecting members, and with the input and the output shaft, and are operated in combinations of two to establish at least five forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets, first and second interconnecting members, and four clutches. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the third planetary gear set and an output member that is continuously connected with another member of the third planetary gear set. The second interconnecting member continuously connects members of the first and second planetary gear sets with the transmission housing. The four clutches provide interconnections between various gear members, the first interconnecting member, and with the input and the output shaft, and are operated in combinations of two to establish at least five forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least seven forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets with three fixed interconnections and six torque transmitting mechanisms. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. The six torque transmitting mechanisms provide interconnections between various gear members and with the transmission housing, the input or output shaft, in some instances, and are operated in combinations of two to establish at least seven forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least seven forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets with two brakes, four clutches and three fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. The two brakes and four clutches provide interconnections between various gear members and with the transmission housing, the input or output shaft, and the three fixed interconnections, and are operated in combinations of two to establish at least seven forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets and four clutches. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. At least one other planetary gear member is continuously connected with the transmission housing. The four clutches provide interconnections between various gear members and with the input and the output shaft, and are operated in combinations of two to establish at least five forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets, two brakes and two clutches. The powertrain includes an engine and torque converter that is continuously connected with at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. The two brakes and two clutches provide interconnections between various gear members and with the transmission housing, the input or output shaft, in some instances, and are operated in combinations of two to establish at least five forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets and four torque-transmitting mechanisms. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. At least one member of the second planetary gear set is continuously connected with the transmission housing. The four torque-transmitting mechanisms provide interconnections between various gear members and with the input and the output shaft, and sometimes with the transmission housing, and are operated in combinations of two to establish at least five forward speed ratios and one reverse speed ratio.

Abstract: A powertrain incorporates three planetary gear sets and five rotating torque transmitting mechanisms in a compact structure having minimum mechanical content to provide at least six forward speed ratios and a reverse ratio between an input shaft and an output shaft. One of the planetary gear sets has three rotatable members with one member continuously connected with the input shaft, another member continuously connected with the output shaft and a further member that is non-continuously interconnected. Another and a further of the planetary gear sets each has three members with respective first members being continuously interconnected and respective second members being continuously interconnected through first and second continuous interconnections, respectively. The third member of the other planetary gear set is non-continuously connected and the third member of the further planetary gear set is continuously connected with a stationary member such as a transmission housing.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets, two brakes and two clutches. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. The two brakes and two clutches provide interconnections between various gear members and with the input, the output shaft, or the transmission housing, in some instances, and are operated in combinations of two to establish at least five forward speed ratios and a reverse speed ratio.

Abstract: A family of power transmissions have three planetary gearsets each of which have first, second, and third members. A pair of fixed interconnecting members establish continuous connections between a member of the first planetary gearset and a member of the second planetary gearset, and between another member of the second planetary gearset and a member of the third planetary gearset, respectively. Each of the transmission family members has an output shaft, which is continuously connected with at least one member of one of the planetary gearsets and an input shaft, which is selectively connectible with at least two members of the planetary gearsets through respective first and second torque-transmitting mechanisms. Four other torque-transmitting mechanisms are provided to establish various interconnections between members of the planetary gearsets and/or members of the planetary gearsets and the transmission housing.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets and four clutches. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. At least one member of the first and second planetary gear sets is continuously connected with the transmission housing. The four clutches provide interconnections between various gear members and with the input and the output shaft, and are operated in combinations of two to establish at least five forward speed ratios and one reverse speed ratio.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets, one brake, and three clutches. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. At least one member of the first gear set is continuously connected with the transmission housing. The brake and three clutches provide interconnections between various gear members and with the input and the output shaft, and sometimes with the transmission housing, and are operated in combinations of two to establish at least five forward speed ratios and one reverse speed ratio.

Abstract: A family of multi-speed transmissions with each family member including three planetary gear sets having three members each. The first planetary gear set has a first member continuously interconnected with an input shaft. The third planetary gear set has a first member continuously interconnected with an output shaft. A second member of the first planetary gear set, a first member of the second planetary gear set and a second member of the third planetary gear set are continuously interconnected for common rotation. The first and third planetary gear sets each have one non-continuously interconnected member, and the second planetary gear set has two non-continuously interconnected members. Two stationary torque transmitting mechanisms are provided to each connect one of the non-continuously interconnected members with a stationary portion of the transmission.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets, and four torque transmitting mechanisms. The fourth torque transmitting mechanism may be either a brake or a fourth clutch. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. At least one other planetary gear member is continuously connected with the transmission housing. The three clutches and torque transmitting mechanism provide interconnections between various gear members and with the input, the output shaft, or the transmission housing, in some instances, and are operated in combinations of two to establish at least five forward speed ratios.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least six forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets and five torque transmitting mechanisms. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. At least one other planetary gear member is continuously connected with the transmission housing. The five torque transmitting mechanisms provide interconnections between various gear members and with the transmission housing, the input or output shaft, in some instances, and are operated in combinations of two to establish at least six forward speed ratios.

Abstract: A method is disclosed for controlling the slip power of a viscous fluid fan drive clutch, especially of a cooling fan drive for an automotive vehicle. Data is prepared correlating slip power generation with clutch input and output speeds for the clutch and fan design. A maximum slip power for the operation of the cooling fan is specified by considering, for one, fan drive durability requirements. During operation of a computer based, fan speed control module, a desired fan drive speed is continually determined for the cooling requirements of the vehicle and the desired fan speed is compared, and adjusted, if appropriate, to avoid excessive slip power.

Abstract: A family of multi-speed transmissions with each family member including three planetary gear sets having three members each. The first planetary gear set has a first member continuously interconnected with an input shaft. The third planetary gear set has a first member continuously interconnected with an output shaft. A second member of the first planetary gear set, a first member of the second planetary gear set and a second member of the third planetary gear set are continuously interconnected for common rotation. The first and third planetary gear sets each have one non-continuously interconnected member, and the second planetary gear set has two non-continuously interconnected members. Two stationary torque transmitting mechanisms are provided to each connect one of the non-continuously interconnected members with a stationary portion of the transmission.

Abstract: A family of transmissions wherein each family member has an input shaft, an output shaft, three planetary gear sets, and five rotating torque transmitting mechanisms (clutches). A first and second of the planetary gear sets have continuously interconnected first and second members through a interconnecting member, and the second members are continuously connected with a stationary housing. The third planetary gear set has a first member connected with the input shaft and a second member is connected with the output shaft. A first clutch selectively interconnects a third member of the first planetary gear set with the third member of the third planetary gear set, the input shaft, or the output shaft. A second clutch selectively interconnects the interconnecting member with the third member of the third planetary gear set, the input shaft, or the output shaft.