HYBRID POWERTRAIN HAVING A MULTI-SPEED TRANSMISSION
First Claim
Patent Images
1. A hybrid powertrain comprising:
- an internal combustion engine;
a transmission having;
a transmission input membera transmission output member;
a first, second, third and fourth planetary gear set each planetary gear set having a sun gear member, a ring gear member and a planet carrier member supporting a plurality of planet gears each configured to intermesh with both the sun gear member and the ring gear member, wherein the transmission input member is continuously interconnected with the planet carrier member of the second planetary gear set, and the transmission output member is continuously interconnected with the planet carrier member of the fourth planetary gear set and the planet carrier member of the third planetary gear set, and wherein the sun gear member of the first planetary gear set is continuously interconnected with the sun gear member of the second planetary gear set, the ring gear member of the second planetary gear set is continuously interconnected with the sun gear member of the third planetary gear set, the planet carrier member of the first planetary gear set is continuously interconnected with the ring gear member of the fourth planetary gear set;
a first clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the planet carrier member of the second planetary gear set and the transmission input member;
a second clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the sun gear member of the third planetary gear set and the ring gear member of the second planetary gear set;
a third clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the ring gear member of the third planetary gear set;
a first brake selectively engageable to interconnect the sun gear member of the first planetary gear set and the sun gear member of the second planetary gear set to the transmission housing;
a second brake selectively engageable to interconnect the ring gear member of the first planetary gear set to the transmission housing; and
wherein the clutches and brakes are selectively engageable to establish at least eight forward speed ratios and at least one reverse speed ratio between the transmission input member and the transmission output member;
a first electric machine connected to the transmission input member between the internal combustion engine and the transmission;
a hydraulic pump connected to the transmission input member for generating oil pressure to control an operation of the transmission; and
an input member clutch for selectively coupling an engine output shaft of the internal combustion engine with the transmission input member.
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Abstract
A hybrid powertrain includes an internal combustion engine, at least one electric machine and a multi-speed transmission. The electric machine is connected to a shaft between the internal combustion engine and the multi-speed transmission. The transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.
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Citations
16 Claims
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1. A hybrid powertrain comprising:
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an internal combustion engine; a transmission having; a transmission input member a transmission output member; a first, second, third and fourth planetary gear set each planetary gear set having a sun gear member, a ring gear member and a planet carrier member supporting a plurality of planet gears each configured to intermesh with both the sun gear member and the ring gear member, wherein the transmission input member is continuously interconnected with the planet carrier member of the second planetary gear set, and the transmission output member is continuously interconnected with the planet carrier member of the fourth planetary gear set and the planet carrier member of the third planetary gear set, and wherein the sun gear member of the first planetary gear set is continuously interconnected with the sun gear member of the second planetary gear set, the ring gear member of the second planetary gear set is continuously interconnected with the sun gear member of the third planetary gear set, the planet carrier member of the first planetary gear set is continuously interconnected with the ring gear member of the fourth planetary gear set; a first clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the planet carrier member of the second planetary gear set and the transmission input member; a second clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the sun gear member of the third planetary gear set and the ring gear member of the second planetary gear set; a third clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the ring gear member of the third planetary gear set; a first brake selectively engageable to interconnect the sun gear member of the first planetary gear set and the sun gear member of the second planetary gear set to the transmission housing; a second brake selectively engageable to interconnect the ring gear member of the first planetary gear set to the transmission housing; and wherein the clutches and brakes are selectively engageable to establish at least eight forward speed ratios and at least one reverse speed ratio between the transmission input member and the transmission output member; a first electric machine connected to the transmission input member between the internal combustion engine and the transmission; a hydraulic pump connected to the transmission input member for generating oil pressure to control an operation of the transmission; and an input member clutch for selectively coupling an engine output shaft of the internal combustion engine with the transmission input member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A hybrid powertrain comprising:
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an internal combustion engine; a transmission having; a transmission input member a transmission output member; a first, second, third and fourth planetary gear set each planetary gear set having a sun gear member, a ring gear member and a planet carrier member supporting a plurality of planet gears each configured to intermesh with both the sun gear member and the ring gear member, wherein the transmission input member is continuously interconnected with the planet carrier member of the second planetary gear set, and the transmission output member is continuously interconnected with the planet carrier member of the fourth planetary gear set and the planet carrier member of the third planetary gear set, and wherein the sun gear member of the first planetary gear set is continuously interconnected with the sun gear member of the second planetary gear set, the ring gear member of the second planetary gear set is continuously interconnected with the sun gear member of the third planetary gear set, the planet carrier member of the first planetary gear set is continuously interconnected with the ring gear member of the fourth planetary gear set; a first clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the planet carrier member of the second planetary gear set and the transmission input member; a second clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the sun gear member of the third planetary gear set and the ring gear member of the second planetary gear set; a third clutch selectively engageable to interconnect the sun gear member of the fourth planetary gear set to the ring gear member of the third planetary gear set; a first brake selectively engageable to interconnect the sun gear member of the first planetary gear set and the sun gear member of the second planetary gear set to the transmission housing; a second brake selectively engageable to interconnect the ring gear member of the first planetary gear set to the transmission housing; and wherein the clutches and brakes are selectively engageable to establish at least eight forward speed ratios and at least one reverse speed ratio between the transmission input member and the transmission output member; an electric machine connected to the transmission input member between the internal combustion engine and the transmission; a torque converter connected between the electric machine and the transmission for transmitting torque generated by one of the engine and the electric machine to the transmission input shaft; a hydraulic pump coupled to the torque converter for receiving rotational energy from the torque converter and configured to generate oil pressure to control an operation of the transmission; and an input member clutch for selectively coupling an engine output shaft of the internal combustion engine with the transmission input member. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification