HTD10-400 pages

Better performance comes
from working together.
March 2015

Page 1 of 4

Traction Control Using HTD10-40 Torque Divider
Overview

Controlling traction in propel applications can be a slippery
problem. Parallel circuits can send all your flow to a spinning
wheel. Series circuits can lead to wheel scuffing or damaging
cavitation.
Traditional solutions to this problem fall into two categories:
inefficient and expensive.
The inefficient solutions use an orificed leak path between
the wheel motors to allow the outside motors additional flow
when cornering. This solution can allow unwanted slippage
when traveling on slick terrain.
The expensive solutions involve sensors to determine when
the flow needs of each wheel are different, valving to regulate
the flow, and controllers to process the information. Not all
applications can afford the added cost.
Applications such as turf care machines are particularly sensitive
to wheel scuffing. Ice surfacing machines are highly susceptible
to slippage. And there are non-propel applications where torque
must be evenly distributed between motors in series.
18 m
10 m

Basic steering geometry: cornering vehicles must spin outside wheels faster.

This 4-way 2-position valve halves the inlet pressure to balance torque
between series motors in a drive circuit.
Series

Traditional Solutions
Series Circuits
We all know that oil in a hydraulic
circuit follows the path of least
resistance. In terms of traction
control, this presents the need to
equalize flow to multiple motors.
Placing them in series is the easiest
way to ensure they all receive the
same flow.

Flow in series circuit is equal,
pressure is additive

Series circuits have some limitations, however:Series
the first being
w/makeup
that pressure is additive in a series circuit. The pressure
available to the system must be shared by all motors in series.
Motors in a series circuit must also be able to accommodate
back pressure.

For detailed information and specifications, visit www.hydraforce.com or contact your local HydraForce
representative at www.hydraforce.com/distribs/world.htm
HYDRAFORCE, INC.

HYDRAFORCE HYDRAULICS, LTD.

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Ph: 847 793 2300 • Fx: 847 793 0086
Web: www.hydraforce.com • E-Mail: sales@hydraforce.com

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Ph: 44 121 333 1800 • Fx: 44 121 333 1810
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HYDRAFORCE HParallel
YDRAULIC SYTEMS
w/slip and CO., LTD.
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GDH Changzhou Airport Indl Park
Xinbei District • Changzhou, China 213022
Ph: 86 519 6988 1200 • Fx: 86 519 6988 1205
Web: www.hydraforce.com • E-Mail: sales@hydraforce.com
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