optimize performance the beginning of the story not much use to us yet add a powertrain not much use to us yet add a cab and controls Still not much use to us ID: 550918
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Slide1Slide2
Modifying your powertrain to
optimize performance
?Slide3
the beginning of the story...
not much use to us yet……..Slide4
add a powertrain…
not much use to us yet…Slide5
add a cab and controls…
Still not much use to us…Slide6
Finally, a fully
vocationalized truckSlide7
We get there by…
CUSTOMIZINGSlide8
This talk today, then, is …
Customize to
OptimizeSlide9
Today’s
Rules of the Road
…
Automated and automatic transmissions2. We will talk in generalities
3. Some powertrain features as examples
4. Some reference material is given
5. Use your dealer to do your customizationSlide10
”I’ll pause for a moment so you can let this information sink in”Slide11
This is how we used to customize..Slide12
Customization today…
is digitalSlide13
What can we digitally customize on a vocational
vehicle?Speed
PermissionsPTO operation
Interlocks
Auto Neutrals
Shift sequence
PerformanceSlide14
Speed control
Low speed control is often required in some applications…Slide15
Where do we need low speed control ?
Low speed controlSlide16
Rate of speed increase
Most engine manufacturers offer speed increase capability when operating under low speed governor control :
stepped or ramped Usually the ramp rate can be changed
.Slide17
Ford – Engine speed control
PTO mode using Stationary Elevated Idle Control (Park
or Neutral only) Minimum engine speed = 900 rpm Maximum engine speed = 3,000 rpm
SEIC initiated by applying battery voltage to Wire Tag : PTO REQUEST
1
Fixed or Variable Target Speed obtained by adding resistor
or
5000 Ohm potentiometer to
Wire
Tag : PTO RPMSlide18
Mack…PTO Speed
ControlEngine Speed Ramp RateStep or Bump Adjustments
Hold to Nearest (set speed rounding)Slide19
International
® – Speed Control for PTO (
MaxxForce® 7,DT,9,10)
Stationary PTO applicationsPreset: 6 speed settings: Low idle > gov. RPM
Ramp rate: 1 >
1500 rpm/sec.
Variable:
With
CRUISE “ON” switch
set
, engine speed is increased via the accelerator pedal or the cruise control switches
using programmed
Ramp Rate
Mobile
Variable Engine Speed
Control
Programmable
: 0
– 20 mphSlide20
Speed
Permissions
PTO operationInterlocks
Auto Neutrals
Shift sequence
PerformanceSlide21
PTO Operation
Power
Take
Offs
Hydraulics
Mechanical drives
Generators
Split shaft
units
Water pumpsSlide22
Transmission
Hydraulic pump
Split shaft unit
Drive shaft and universal joint
Generator / Other equipment
Drive shaft
Split shaft drive systemSlide23
PTO Operation may need…
Engagement Speed control Torque control Remote Control Slide24
PTO Control
PTO’s need to...
Engage at:
xxx RPM engine speed
xxx RPM driveline speed
Disengage at:
xxx RPM engine speed
xxx RPM driveline speedSlide25
International
® PTO Controls (
electric over hydraulic)Programmable Engagement Parameters
Status of Service Brake Status of clutch Park brake
Engine
running
Engine
speed over set value (must be > 600 rpm)
Engine
speed engagement limit (< 900 rpm)
Status
of transmission in
Neutral/Park
Vehicle
speed Air pressure Vehicle master switch
Slide26
Allison PTO Speed Control
1000/2000/3000/4000 familiesSlide27
Cummins – PTO
Functions - ISLSlide28
What types of vehicles especially need good PTO speed control
?
Snow plows need speed controlled PTO’sSlide29
PTO torque control
Used to manage input torque to a pump or generator powered by the PTO
Settings: Engine torque Speed ratio (engine : PTO output)Slide30
PTO remote controlSlide31
Cummins – Remote PTO (ISB / ISL / ISX)
Enable/Disable Default = OFF Speed setting 1 1200 rpm
Speed setting 2-5 ISB 950 rpm ISL / ISX 800 – 1100 rpmSlide32
Speed
Permissions
PTO operationInterlocks
Auto Neutrals
Shift sequence
PerformanceSlide33
Permissions
A controller looks at one or more inputs, and if conditions are met, a circuit is closed. For example:
PTO enable
Drive enable Neutral enable Reverse enableSlide34
REQUEST
ACTION
PTO engagement
Is
engine speed below the set limit?
Is road speed below the set limit?
Have transmission conditions been met (e.g. is oil feed pressure high enough to safely operate the PTO clutch) ?
Air pressure (if air engagement is used)
PTO speed
overrides
A programmable condition which allows the operator to momentarily override a programmed PTO speed using the
accelerator
Split shaft
engagement
Is park brake enabled?
Is the transmission locked in the correct gear
?
Engine speed operation and high
idle
Service brakes or park brakes set, if programmed?
Programmable alarms?
Systems to enable the vehicle to slowly move without throttle application at constant engine speed (e.g. Eaton’s Creep or Urge-to-Move systems)
Forward
gear / Reverse gear
Are engine speeds correct for engagement?
Are all switches for auxiliary equipment in their correct state?
Is service brake enabled
(
if so required by programming
)
DECISION
CONDTIONSSlide35
Speed
Permissions
PTO operationInterlocks
Auto Neutrals
Shift sequence
PerformanceSlide36
Interlocks
Auxiliary function
Dump bed
Doors
Lift gate
Bucket lift
Outriggers
Range selection
Drive
ReverseSlide37
How mistakes are made...
COSTLYFATALSlide38
Speed
Permissions
PTO operation
InterlocksAuto Neutrals
Shift sequence
PerformanceSlide39
Auto neutrals are essential in some applications, like
Refuse Packers.Auto Neutrals
Initiated by: Park Brake Work Brake Service BrakeDrive re-attained by Range reselection
(with or without override) Release of brake + switchSlide40
Eaton … Auto Neutral
UltraShift PLUS & Fuller Advantage Automated
Neutral attained when Parking Brake is applied.
Auxiliary devices must provide an electrical interface with the transmission.Auto Neutral integrated via:
Normally-closed
pressure
switch.
J1939
Park Brake status message
(on
later
models)Slide41
Allison Auto Neutrals
Requiring reselection of range
Park Brake ON
NEUTRAL
DRIVE
Park Brake OFF
Reselect
Function LSlide42
Park Brake ON
NEUTRAL
DRIVE
Park Brake OFF
Reselect
Function CD
Override Park Brake
Allison Auto Neutrals
Requiring reselection of rangeSlide43
Allison Auto Neutrals
Automatic reselection of range
Park Brake ON
NEUTRAL
DRIVE
Park Brake OFF
Function AG
Switch OPEN
Switch CLOSEDSlide44
Allison Auto Neutrals
Automatic reselection of range
Park Brake ON
NEUTRAL
DRIVE
Park Brake OFF
Function AK
Arms RETRACTED
Arms EXTENDEDSlide45
Allison Auto Neutrals
Automatic reselection of range
Park Brake ON
NEUTRAL
DRIVE
Park Brake OFF
Function CN
Service Brakes ONSlide46
Allison Auto Neutrals
Automatic reselection of range
J1939 Service Brake Status ON
NEUTRAL
DRIVE
Service Brake Status OFF
OR
Switch OPEN
OR
Range RESELECTED
OR
Output SPEED >
cal
Function CA
Switch CLOSEDSlide47
Speed
Permissions
PTO operation
InterlocksAuto Neutrals
Shift sequence
PerformanceSlide48
Automated transmissions may skip shift.
Allison automatics can start in 1
st or 2nd and be limited in the number of gears which can be attained.
Stand up position with different shift mask
Shift pattern
(mask)Slide49
Speed
Permissions
PTO operation
InterlocksAuto Neutrals
Shift sequence
PerformanceSlide50
Performance
Examples of
acceleration
control: Rate
Speed threshold
Slide51
Setting shift points for levels of performance:
Shifts for
economy
Shifts for
performance
Computer algorithms measure “road load” …Slide52
Settings are available for LEVELS of performance…
High ECONOMY
High PERFORMANCESlide53
Customize to Optimize
Engine, transmission and truck OEM’s have a great variety of electronic features which can be used to greatly enhance the vocational capability of your truck. Slide54
Customize to Optimize
Users and Fleet Owners
Identify the features you need
Make sure default values are what you expect
Work with your dealer to customize the values to satisfy your needsSlide55
Customize to Optimize
Bodybuilders
Work with your customer to identify the features they need, as well as the values
Work with your OEM so that the chassis is delivered to you with as many settings as possible “baked into” the calibration via VEPS (Vehicle Engineering Programming Stations)Slide56
Johansson & Associates
317-657-9619 joe@josephjohansson.com www.josephjohansson.com
Details given are taken off publicly available websites.The author has no vested interest in any of the products or companies mentioned.
Not all products or features by all OEM’s have been covered, but mainly those engaged in powertrain components for Class 7 and 8 vocational trucks.Not all features are available from all OEM’s.
The intent has been to provide a thought-starter, and then to encourage the reader to take
further questions
to the OEM or the dealer network.