Cruise Control

Cruise Control
DDEC FOR MBE900 AND MBE4000
5.3
CRUISE CONTROL
Cruise Control maintains a targeted speed (MPH or RPM) by increasing or decreasing fueling.
The targeted speed can be selected and adjusted with dash-mounted switches. Up to five digital
inputs are required (four for automatic transmission) for Cruise Control operation. A Vehicle
Speed Sensor (VSS) is required for Vehicle Speed Cruise Control or an output shaft speed
message over the J1939 data link.
5.3.1
OPERATION
Cruise Control will operate in either Engine or Vehicle Speed Mode.
Vehicle Speed Cruise Control
Vehicle Speed Cruise is enabled when "Enable Cruise" and a Vehicle Speed Sensor (VSS) is
installed or output shaft speed is received over J1939. Engine speed and power are varied under
Vehicle Speed Cruise Control to maintain the set vehicle speed. The vehicle speed must be
above 20 mph (32 km/hr).
This type of Cruise Control is required when either of the following conditions exists:
Vehicle Speed Limiting -- Vehicle Speed Cruise Control is mandatory if the vehicle speed
limit is programmed and Cruise Control is desired. This will prevent the DDEC-ECU from
fueling the engine at speeds greater than the vehicle speed limit.
Automatic Transmissions -- Vehicle Speed Cruise Control must be selected if the vehicle is
equipped with an automatic transmission. This will ensure proper transmission upshifts
while in Cruise Control. Refer to the transmission manufacturer's manual for more
information and see the Vehicle Interface Harness schematic.
Cruise Control can be overridden at any time with the foot pedal if the vehicle is operating at less
than the programmed Vehicle Speed Limit.
Clutch pedal, service brake pedal, and throttle interlock input, if configured, are monitored to
abort fueling the engine in Cruise Control Active Mode if there is driver action.
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
5-7
FEATURES
There are three Cruise Control operation modes as listed in Table 5-4.
Set Speed
Engine Fuel
Controlled By
Cruise Control
0 MPH
No
Active
Cruise Control ON/OFF switch in ON position
and Cruise Control is allowed and set speed
has already been set. The set speed can
be increased or decreased by using the
Resume/Accel and Set/Coast switches.
Set Speed (+/-)
Yes
Standby
Cruise Control ON/OFF switch in On position
and Cruise Control formally active but not
allowed anymore or no set speed has been
set after switching Cruise Control On and
Cruise Control is allowed.
Last Set speed on
Hold in Memory
No
Cruise Control
Mode
Conditions
Cruise Control ON/OFF switch is in OFF
position or Cruise Control ON/OFF is
switched to ON position although Cruise
Control is not allowed.
Off
Table 5-4
Three Cruise Control Operation Modes
Engine Brakes in Cruise Control (Optional)
When there is vehicle acceleration above set speed, engine brakes (if configured) are activated to
keep the desired road speed.
Cruise Auto Resume (Optional)
The Cruise Auto Resume feature will resume Vehicle Speed Cruise Control based on the
calibration setting.
1 = Cruise Control is resumed immediately after the clutch pedal is released.
2 = Cruise Control is resumed if the clutch has been pushed twice and released within three
(3) seconds.
Smart Cruise
The Eaton® Smart Cruise® system will send a "heart beat" message on the SAE J1939 Data Link.
Manual Cruise Control and Smart Cruise will be disabled if the message is not received over the
data link or the message indicates that there is a failure in Smart Cruise. To regain manual control,
the driver must toggle the Cruise Master Switch twice within 10 seconds.
Smart Cruise must be configured by VEPS. For additional information on Smart Cruise, contact
Eaton Corporation.
5-8
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
DDEC FOR MBE900 AND MBE4000
Cruise Enable
Cruise Control is enabled, but not active when the Cruise Control Enable digital input is switched
to battery ground.
The Cruise Enable switch is a normally open switch.
Set / Coast
The Set/Coast switch is a momentary switch.
Set:
Cruise Speed is set by momentarily contacting the switch to the ON position
(switching the digital input to battery ground). Cruise Control will become
active and maintain the vehicle speed present at the time.
Coast:
When Cruise Control is active, the Set/Coast input can be used to reduce power
and speed by toggling the switch. Momentarily toggling and releasing the
Set/Coast switch will decrease the set point by 1.24 mph (2 km/hr) increments
for Vehicle Speed Cruise Control. Holding the Set/Coast will decrease the set
point by 1.24 mph (2 km/hr) per second. When released the Cruise Control set
point will be at the new speed.
Resume / Accel
The Resume/Accel switch is a momentary switch.
Resume:
If Cruise Control has been disabled with the service brake or the clutch switch,
momentary contact to the ON position (switching the input to battery ground)
restores the previously set cruise speed.
Accel:
When Cruise Control is active, the Resume/Accel input can be used to increase
power and speed by toggling the switch. Momentarily toggling and releasing the
Resume/Accel switch will increase the set point by 1.24 mph (2 km/hr) increments
for Vehicle Speed Cruise Control. Holding the Resume/Accel will increase the
set point by 1.24 mph (2 km/hr) per second (Vehicle Speed CC). When released
the Cruise Control set point will be at the new speed.
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
5-9
FEATURES
Clutch Released (Manual Transmissions)
This input indicates that the clutch is released and is used for suspending Cruise Control and
Auto Resume.
When the clutch is released, the input is at battery ground. Cruise Control is suspended if the
clutch is pressed once. If the clutch pedal is pressed twice within three seconds, Cruise Control
is automatically resumed if Cruise Auto Resume is configured depending on the calibration
setting selected (refer to “Cruise Auto Resume”).
The digital input logic for the Clutch Switch disables Cruise Control in the unlikely event of a
broken clutch switch wire.
This switch is a normally closed switch.
Service Brake Released (Automatic and Manual Transmissions)
This input indicates that the brake is released when switched to battery ground. If the brake is
activated, then the input is not grounded and Cruise Control is suspended. Cruise Control is
resumed by using the Resume/Accel Switch.
The input logic for the Brake Switch disables Cruise Control in the unlikely event of a broken
brake switch wire.
This switch is a normally closed switch.
Throttle Inhibit Switch
This input indicates that the throttle inhibit function is active when switched to battery ground.
Cruise Control is deactivated if the throttle inhibit switch is grounded.
5-10
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
DDEC FOR MBE900 AND MBE4000
Cruise Control Modes
Separate programmable thresholds are available for increasing and decreasing set speed using
the Cruise Control switches Resume/Accel and Set/Coast. The difference between the new set
speed and road speed is limited to the programmable thresholds.
All Cruise Control modes, conditions, and action taken are listed in Table 5-5.
Cruise Control Mode
Status Change
Condition
Action Taken
Standby/Active to Off
Cruise Control ON/OFF switch is switched to
OFF position
Set Speed = 0 MPH
Off to Standby
Standby to Active
Cruise Control ON/OFF switch is switched
from OFF to ON position
Cruise Control switch is toggled to Set/Coast
position
Set Speed = Road Speed
Cruise Control switch is toggled to
Resume/Accel position and the desired road
speed has already been set (> 0 MPH)
Set Speed = Set Speed
Cruise Control switch is toggled to
Resume/Accel position and no desired road
speed has been set before (=0 MPH)
Set Speed = Road Speed
Cruise auto resume
Cruise Control switch is toggled to Set/Coast
position
Cruise Control switch is held in Set/Coast
position for more than one second
Active
Active to Standby
Table 5-5
5.3.2
Set Speed = Set Speed
Set Speed = Set Speed
Set Speed = Set Speed –
Speed Step Down
Set Speed = Set Speed – Speed
Ratio Down Time
Cruise Control switch is toggled to
Resume/Accel position
Set Speed = Set Speed +
Speed Step Up
Cruise Control switch is held in Resume/Accel
position for more than one second
Set Speed = Set Speed +
Speed Ration up Time
Cruise Control switch is not toggled
Set Speed Hold in Memory
Brake switch, clutch switch toggled, vehicle
speed drops below min cruise speed
Set Speed Hold in Memory
Cruise Control Mode Status Change
INSTALLATION
The following is a list of switches and DDEC-VCU sensors that are required for Cruise Control
operation.
Cruise Control ON/OFF (Switch or J1939)
Service Brake (Switch or J1939)
Clutch Released for Manual Transmission (Switch or J1939)
Set/Coast (Switch or J1939)
Resume/Accel (Switch or J1939)
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
5-11
FEATURES
Vehicle Speed Sensor (or J1939)
See Figure 5-1 for a diagram of the Cruise Control circuit.
Figure 5-1
5-12
Cruise Control Circuit
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
DDEC FOR MBE900 AND MBE4000
5.3.3
PROGRAMMING REQUIREMENTS AND FLEXIBILITY
To configure an engine for Cruise Control, the digital inputs listed in Table 5-6 must be selected.
These parameters can be set with VEPS, DRS or the minidiag2. Refer to section 4.1, “Digital
Inputs,” for more information.
Parameter
Enable Service Brake Input
Service Brake Input
Configuration
1=
2=
3=
Configuration Cruise Control
On/Off Switch
1=
2=
3=
Source Address 1 (SA1)
for Receiving Multiplexed
Switch Status
Source Address 2 (SA2)
for Receiving Multiplexed
Switch Status
Source Address 3 (SA3)
for Receiving Multiplexed
Switch Status
Table 5-6
1 = Enabled
1 13 04
0 = Hardwired
1 13 05
1 = Enabled
1 13 08
0 = Hardwired
1 13 09
0 = Hardwired
1 13 11
0 = Hardwired
1 13 12
0 = Hardwired
1 13 15
0 — 55
23
1 01 09
0 — 255
33
1 01 10
0 — 255
49
1 01 11
1 = Enable
Service Brake Input
Configuration
Clutch Switch Configuration
Parameter
ID
1 = Enable
2 = Disable
0 = Hardwired
1 = Source Address 1 (SA1)
2 = Source Address 2 (SA2)
3 = Source Address 3 (SA3)
Enable Park Brake Input
Cruise Control Set/Coast and
Resume/Control Switches
Configuration
Default
Setting
1=
2=
3=
1=
2=
3=
0 = Hardwired
Source Address 1 (SA1)
Source Address 2 (SA2)
Source Address 3 (SA3)
0 = Hardwired
Source Address 1 (SA1)
Source Address 2 (SA2)
Source Address 3 (SA3)
0 = Hardwired
Source Address 1 (SA1)
Source Address 2 (SA2)
Source Address 3 (SA3)
0 = Hardwired
Source Address 1 (SA1)
Source Address 2 (SA2)
Source Address 3 (SA3)
Cruise Control Input Configuration
A Vehicle Speed Sensor must be configured for Vehicle Speed Cruise Control. Refer to section
3.7.6, "Vehicle Speed Sensor," for additional information.
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
5-13
FEATURES
The Cruise Control parameters listed in Table 5-7 can be set by minidiag2.
Parameter
Description
Min Road Speed
Minimum road speed for
Cruise Control
Max Set Speed
Cruise Control vehicle set
speed cannot be faster than
this value.
Cruise Set Speed
Increment
Cruise Set Speed
Decrement
Cruise Set Speed
Ramp Up
Cruise Set Speed
Ramp Down
Enable Cruise
Auto Resume
Enable Engine
Brakes on Cruise
Control
Table 5-7
Range
Set Speed increment for
every Resume/Accel switch
momentary press.
Set Speed decrement for
every Set/Coast switch
momentary press.
Set Speed increment for
Resume/Accel switch
continuous press.
Set Speed decrement for
Set/Coast switch continuous
press.
Enables or disables the
auto resume feature.
Access
Nexiq DDR,
DDDL,
DRS, VEPS,
minidiag2
Nexiq DDR,
DDDL,
DRS, VEPS,
minidiag2
38 – 152 km/hr
48 km/hr
1 15 01
48–152 km/hr
152 km/hr
1 15 02
0–10 km/hr
2 km/hr
1 15 03
VEPS, DRS,
minidiag2
0–10 km/hr
2 km/hr
1 15 04
VEPS, DRS,
minidiag2
0–20 km/hr/sec
2 km/hr
1 15 05
VEPS, DRS,
minidiag2
0–20 km/hr/sec
2 km/hr
1 15 06
VEPS, DRS,
minidiag2
1 15 07
Nexiq DDR,
DDDL,
DRS, VEPS,
minidiag2
1 10 06
Nexiq DDR,
DDDL,
DRS, VEPS,
minidiag2
0 = Disable
1 = Enable after
1st clutch release
2 = Enable after
clutch released
twice
Enables or disables the
engine brakes during Cruise
Control.
Parameter
ID
Default
0 = Disable
1 = Enable
0
0
Cruise Control Parameters
If Smart Cruise is installed on the vehicle the parameter listed in Table 5-8 must be enabled
by VEPS, DRS or the minidiag2.
Parameter
Description
Choice
Default
Parameter ID
Adaptive Cruise
Control
Enables/Disables
the feature.
0 = Disable
1 = Enable
0
1 15 10
Table 5-8
5-14
Smart Cruise Parameter
All information subject to change without notice.
7SA825 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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