Power Flow Chart

POWER FLOW REFERENCE

P, N	UD/B	LR/B	26/B	35R/C	OD/C	OWC
P, N		.

Fig 1: Clutch & Brake - Power Flow Chart

Courtesy of HYUNDAI MOTOR CO.

Direction of Rotation
Lower & Reverse Brake (LR/B) Activation → Overdrive (O/D) Hub Lock → Mid & Rear P/C Lock
Input Shaft Rotation → Rear Sun Gear Rotation → Rear Inner Pinion Rotation (Reverse) → Rear Outer Pinion Rotation → Rear Annulus Gear Rotation → Front Annulus Gear Rotation → Front Pinion Rotation → Front Sun Gear Rotation (Reverse) → Underdrive (U/D) Hub Rotation (Reverse)
Input shaft rotation → Overdrive Clutch (OD/C) Retainer Rotation

Input shaft rotation → 35R Clutch Rotation

CLUTCH ROTATION SPECIFICATION

R	UD/B	LR/B	26/B	35R/C	OD/C	OWC
R		.		.

Fig 2: Clutch & Brake - Circuit Diagram

Courtesy of HYUNDAI MOTOR CO.

Power Delivery Route
Middle carrier locked and middle sun gear in rotation
Rotating the middle planetary gear's sun gear while its carrier is locked in place slows down and reverse rotates the annulus gear (front carrier), resulting in power transfer to the front carrier.

The rear planetary gear's rear and front annulus gears rotate at a reduced rate, resulting in reverse, zero load rotation of the front planetary gear's front sun gear.

GEARS SPECIFICATION

D1	UD/B	LR/B	26/B	35R/C	OD/C	OWC
D1	.	(o)				.

Fig 3: Power Delivery Route - Circuit Diagram

Courtesy of HYUNDAI MOTOR CO.

Power Delivery Route
Front sun gear and middle & rear carrier locked and rear sun gear in constant rotation
When the rear sun gear is rotated, power is reduced at the rear planetary gear and then delivered to the rear and front annulus gears. The power is then reduced again at the front planetary gear, whose sun gear is locked in place, and then delivered to the front carrier.

Here, the middle annulus gear, which comprises of a single unit with the front carrier, rotates and results in reverse, zero load rotation of the middle sun gear.

GEARS SPECIFICATION

D2	UD/B	LR/B	26/B	35R/C	OD/C	OWC
D2	.		.

Fig 4: Power Delivery Route - Circuit Diagram

Courtesy of HYUNDAI MOTOR CO.

Power Delivery Route
Front sun gear and middle sun gear locked and rear sun gear in constant rotation

Rotating the rear sun gear delivers power to the rear & front annulus gears, and reaction from the front carrier and the middle annulus gear, to which the sun gear is attached, transfers to the middle and rear carriers, resulting in power equilibrium and power transfer to the front carrier.

GEARS SPECIFICATION

D3	UD/B	LR/B	26/B	35R/C	OD/C	OWC
D3	.			.

Fig 5: Power Delivery Route - Circuit Diagram

Courtesy of HYUNDAI MOTOR CO.

Power Delivery Route
Front sun gear locked and middle and rear sun gears in rotation

Rotating the middle sun gear and the rear sun gear transfers power to the rear and front annulus gears, and reaction from the front carrier and the middle annulus gear, to which the sun gear is attached, transfers to the middle and rear carriers, resulting in power equilibrium and power transfer to the front carrier.

GEARS SPECIFICATION

D4	UD/B	LR/B	26/B	35R/C	OD/C	OWC
D4	.				.

Fig 6: Power Delivery Route - Circuit Diagram

Courtesy of HYUNDAI MOTOR CO.

Power Delivery Route
Front sun gear locked and rear carrier and rear sun gears in rotation
Activation of the overdrive clutch (OD/C) synchronizes the rear planetary gear's carrier and sun gears. The 1:1 rotation ratio passes through the rear and front annulus gears and reaches the front planetary gear's front carrier, to which the sun gear is attached.

Here, the middle planetary gear's middle sun gear rotates at a faster rate in the normal direction and at zero load due to the actions of the reduced annulus gear and the carrier having a 1:1 rotation ratio.

GEARS SPECIFICATION

D5	UD/B	LR/B	26/B	35R/C	OD/C	OWC
D5				.	.

Fig 7: Power Delivery Route - Circuit Diagram

Courtesy of HYUNDAI MOTOR CO.

Power Delivery Route
Middle and rear carriers, middle sun gear, and rear sun gear in rotation
The middle planetary gear's middle carrier and sun gear rotate simultaneously, resulting in the 1:1 rotation ratio being transferred to the middle annulus gear (front carrier).

Here, the rear planetary gear rotates in a 1:1 rotation ratio, as it would when the 4th gear is engaged; however, the front planetary gear remains unrestrained and the front sun gear rotates in the normal direction, at a zero load, and at a rotation ratio of 1:1.

GEARS SPECIFICATION

D6	UD/B	LR/B	26/B	35R/C	OD/C	OWC
D6			.		.

Fig 8: Power Delivery Route - Circuit Diagram

Courtesy of HYUNDAI MOTOR CO.

Power Delivery Route
Middle carrier in rotation and middle sun gear locked
When the middle planetary gear's sun gear is locked in place and the train's carrier's allowed to rotate, the middle annulus gear increases its rate of rotation and transfers power to the front carrier.
Here, the rear planetary gear maintains a 1:1 rotation ratio as it would when 4th or 5th gear is engaged; however, the front planetary gear remains unrestrained and the front sun gear rotates at a faster rate in the normal direction and at zero load.