ELECTRIC VARIABLE TRANSMISSION FOR HYBRID ELECTRIC VEHICLES WITH THREE FORWARD MODES, ONE REVERSE MODE, AND FIVE FIXED GEARS
First Claim
1. An electric variable transmission with three forward modes, one reverse mode, and five fixed gears, comprising:
- a first, second, and third planetary gear set, wherein the first, second, and third planetary gear sets are interconnected;
an input shaft connected to the second planetary gear set;
a first electric motor connected to second planetary gear set and connected to the first planetary gear set through a first selectively engageable clutch;
a second electric motor connected to the first and the third planetary gear sets;
a transmission housing connected to the first and third planetary gear sets through a first selectively engageable brake and to the third planetary gear set through a second selectively engageable brake;
a second selectively engageable clutch connected between the first and second planetary gear set; and
an output shaft connected to the third planetary gear set and to the second planetary gear set through a third selectively engageable clutch.
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Accused Products
Abstract
The present disclosure provides a power split transmission with three forward Electric Variable Transmission (EVT) modes, one reverse EVT mode, and five fixed gears for use in hybrid electrical vehicles (HEV). The present disclosure utilizes two electric motors (“E-motors”), an engine, three planetary gear sets, three selectively engageable clutches, and two selectively engageable brakes. The clutches and brakes are engaged in different combinations to engage the different gears and EVT modes. In the five fixed gears, power is transmitted only on the mechanical path for the highest transmission efficiency. In the EVT modes, a part of the power is transmitted electrically. Additionally, the present disclosure includes a front E-motor designed allowing scalable E-motors and a modular transmission design and a center E-motor design.
22 Citations
22 Claims
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1. An electric variable transmission with three forward modes, one reverse mode, and five fixed gears, comprising:
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a first, second, and third planetary gear set, wherein the first, second, and third planetary gear sets are interconnected; an input shaft connected to the second planetary gear set; a first electric motor connected to second planetary gear set and connected to the first planetary gear set through a first selectively engageable clutch; a second electric motor connected to the first and the third planetary gear sets; a transmission housing connected to the first and third planetary gear sets through a first selectively engageable brake and to the third planetary gear set through a second selectively engageable brake; a second selectively engageable clutch connected between the first and second planetary gear set; and an output shaft connected to the third planetary gear set and to the second planetary gear set through a third selectively engageable clutch. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electric variable transmission with three forward modes, one reverse mode, and five fixed gears, comprising:
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a first, second, and third planetary gear set, wherein the first, second, and third planetary gear sets are interconnected; an input shaft connected to the third planetary gear set; a first electric motor connected to the third planetary gear set and to the second planetary gear set through a first selectively engageable clutch; a second electric motor connected to first planetary gear set; a transmission housing connected to the first planetary gear set through a first selectively engageable brake and a second selectively engageable brake; a second selectively engageable clutch connected between the second and third planetary gear set; and an output shaft connected to the first planetary gear set and the third planetary gear set through a third selectively engageable clutch. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An electric variable transmission with three forward modes, one reverse mode, five fixed gears, and a center E-motor design, comprising:
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a first, second, and third planetary gear set, wherein the first, second, and third planetary gear sets are interconnected; an input shaft connected to the second planetary gear set; a first electric motor connected to second planetary gear set; a second electric motor connected to the first and the third planetary gear sets, wherein the first and second electric motors are located between the second and the third planetary gear sets; a transmission housing connected to the first and the third planetary gear sets through a first selectively engageable brake and to the third planetary gear set through a second selectively engageable brake; a first selectively engageable clutch and a second selectively engageable clutch connected between the first and second planetary gear set; and an output shaft connected to the third planetary gear set and to the first planetary gear set through a third selectively engageable clutch. - View Dependent Claims (14, 15, 16, 17)
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18. An electric variable transmission with three forward modes, one reverse mode, five fixed gears, and a front and center E-motor design, comprising:
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a first, second, and third planetary gear set, wherein the first, second, and third planetary gear sets are interconnected; an input shaft connected to the first planetary gear set; a first electric motor connected to the first planetary gear set and to the second planetary gear set through a first selectively engageable clutch; a second electric motor connected to the first and the third planetary gear sets, wherein the second electric motor is located between the second and the third planetary gear sets; a transmission housing connected to the second planetary gear set through an overrunning clutch and to the third planetary gear set through a first selectively engageable brake; a second selectively engageable clutch connected between the first and second planetary gear set; a second selectively engageable brake connected between the second and third planetary gear sets and the second electric motor; and an output shaft connected to the third planetary gear set and to the first and second planetary gear sets through a third selectively engageable clutch. - View Dependent Claims (19, 20, 21, 22)
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Specification