CAPITULO V: RESULTADOS
5.2. Contraste de hipótesis
Feature Description
Within engine speed, there are two parameters that can be set: Engine Speed Without Vehicle Speed Sensor and Maximum Switched Engine Speed.
Maximum engine speed without vehicle speed sensor will limit engine rpm to a set speed if no vehicle speed is detected or if a fault is detected with the vehicle speed sensor or circuit. This speed can be set down to 1400 rpm or as high as the governed speed of the engine.
Maximum switched engine speed will limit the engine speed to a lower maximum engine speed when the engine is powering speed sensitive equipment, such as a vehicle hydraulic system used in refuse trucks. An OEM supplied switch is required for the operator to activate or deactivate the maximum switched engine speed. When deactivated, the engine's maximum speed will be limited to the governed engine speed.
Adjustable Parameters
Name: Maximum Engine Speed without Vehicle Speed Sensor Range: 1400 RPM to Governed Engine Speed
Description: Setting this parameter will limit engine rpm if no vehicle speed is detected or if a fault is detected with the vehicle speed sensor or circuit. 1400 rpm is the recommended setting to maximize potential fuel savings while the vehicle is not moving. Setting this parameter at 1400 rpm will also allow most vehicles to be driven to a repair location if a sensor or circuit fault is detected.
Name: Maximum Switched Engine Speed (High Speed Governor Switched Speed ISB, ISC, ISL, ISB (4 Cylinder) ISBe (4 and 6 cylinder) Only and Gas Plus)
Range: Varies by engine
Description: This parameter sets the speed at which engine rpm will be limited if the operator activates the switched speed. The use of an operating speed is most common in refuse trucks utilizing the continuous packing feature
in which a maximum engine operating speed is desired during operation such that the vehicle hydraulic system is not damaged due to overspeed.
Driver Activation/Deactivation
Engine Speed Without Vehicle Speed Sensor - There is no driver activation or deactivation associated with this parameter.
Maximum switched engine speed can be activated and deactivated by a switch on the dashboard or by OEM equipment switches.
Interaction with other Features and Parameters
NoneSpecial Instructions
NoneDisadvantages
Possible customer complaints due to maximum engine speed without vehicle speed are engine rpm does not reach governed speed while vehicle is not moving.
Visual Aids
NoneTransmission (212-021)
Feature Description
This feature is intended to specify or enable several parameters within the engine's software that interact with the vehicle's transmission. The parameters will either specify or enable the following:
• Transmission type
• Style of Top 2 transmission
• Gear ratios in the transmission
• Activate Top 2 with cruise control switch
• Type of pulse width modulation output
Adjustable Parameters
Name: Transmission Type
Range: Manual, automatic, fully automated, or partially automated
Description: This parameter defines the type of transmission that is installed in the vehicle. Available types include:
• Manual
• Automatic (Allison, Voith, ZF transmissions)
• Fully Automated (Eaton Autoshift, Meritor Engine Synchro Shifting, Meritor Sureshift transmissions)
• Partially Automated (Eaton Top 2 transmission) Name: Automatic Transmission
Range: Enable
Description: Indicates whether the equipment has an automatic transmission. The Vehicle Speed Sensor Anti-Tampering feature requires the transmission type in order to properly activate transmission specific anti-tampering detection software.
Name: Top Gear Ratio
Range: Varies by Electronic Control Module (ECM) Calibration
Description: This parameter defines the gear ratio of the top transmission gear. This parameter must be set to the top gear ratio value supplied by the manufacturer of the transmission. For example: The gear ratio value for the 10th gear of a 10-gear transmission.
Name: Gear Down Ratio
Range: Varies by ECM Calibration
Description: This parameter defines the gear ratio of the 1st gear down transmission gear. This parameter is set to the one gear down gear ratio value supplied by the manufacturer of the transmission. For example: the gear ratio value for the 9th gear of a 10-gear transmission.
Name: Two Gears Down Gear Ratio Range: Varies by ECM Calibration
Description: This parameter defines the gear ratio of the 2nd gear down transmission gear. This parameter is set to the two gears down gear ratio value supplied by the manufacturer of the transmission. For example: the gear ratio value for the 8th gear of a 10-gear transmission.
Name: Three Gears Down Gear Ratio Range: Varies by ECM Calibration
Description: This parameter defines the gear ratio of the 3rd gear down transmission gear. This parameter is set to the three gears down gear ratio value supplied by the manufacturer of the transmission. For example: the gear ratio value for the 7th gear of a 10-gear transmission.
Name: Top 2 Transmission Type Range: Eaton or Spicer
Description: This parameter defines the type of Top 2 transmission installed in the vehicle. If either an Eaton Top 2 or Spicer AutoMate-2 transmission is installed, then the Top 2 Transmission Type needs to be specified. Top 2 Transmission Type can be chosen if the Transmission Type of Partially Automated has been selected. A compatible transmission must be installed.
NOTE: The Spicer AutoMate-2 transmission shares a programmable pin-out with Centinel™ hardware. The Top 2 Transmission Type parameter can not be Spicer when Centinel™ system hardware is installed.
Name: Activate Top 2 with Cruise Control Switch Range: Enable
Description: This parameter allows the driver to select a partially automated or manual transmission using the OEM supplied cruise control on/off switch. The driver must place the cruise control switch to ON before activating the Top 2 automated shifting. If an Eaton transmission is installed and the Top 2 automated shifting is active and the driver places the cruise control switch to OFF, the operator can now shift manually. If a Spicer transmission is installed and the Top 2 automated shifting is active and the driver places the cruise control switch to OFF, there is no effect to the Top 2 automated shifting until the gearshift is moved out of the AUTO position. This parameter requires a cruise control On/Off switch.
Name: Pulse Width Modulation Output Type
Range: None, 80 percent throttle on with 65 percent throttle off, 70 percent throttle on with 55 percent throttle off, 60 percent throttle on with 45 percent throttle off, increasing Pulse Width Modulation, decreasing Pulse Width Modulation, Pulse Width Modulation proportional to engine speed.
Description: Pulse Width Modulation Output Type is to use an analog signal to control a transmission that relies on an analog signal for optimal operation. Pulse Width Modulation Output Type allows the ECM to send an analog signal whose duty cycle is proportional to engine torque output (Pulse Width Modulation proportional to increasing throttle, decreasing throttle, or to engine speed). The Pulse Width Modulation signal can also be configured as a kick-down signal where the signal is either at 12 volts or open depending on the load. The signal is at a minimum Pulse Width Modulation at five percent duty cycle and at maximum Pulse Width Modulation at 95 percent duty cycle and cycles at 125 Hz. The kick-down signal is offered with several programmable thresholds for activating the kick-down and deactivating the kick-down (i.e. 80 percent throttle on with 65 percent throttle off). Allison and Aisin transmissions use Pulse Width Modulation Outputs. Aisin transmissions will typically require this setting adjusted as an increasing Pulse Width Modulation output. Allison transmissions typically require this parameter set as a kick-down signal. The transmission supplier dictates the setting of this feature for optimization.
NOTE: This adjustable parameter is available when a variable speed fan, using Pulse Width Modulation frequency control, is not installed on the vehicle.
Driver Activation/Deactivation
The adjustable parameter Activate Top 2 with Cruise Control Switch requires the driver to select a partially automated or manual transmission operating condition using the OEM supplied cruise control on/off switch. The driver must place the cruise control switch to ON before activating the Top 2 automated shifting. If an Eaton transmission is installed and the Top 2 automated shifting is active and the driver places the cruise control switch to OFF, the driver can now shift manually. If a Spicer transmission is installed and the Top 2 automated shifting is active and the driver places the cruise control switch to OFF, there is no effect to the Top 2 automated shifting until the gearshift is moved out of the AUTO position. This parameter requires a cruise control On/Off switch.
Interaction with other Features and Parameters
CELECT™ Plus uses the automatic transmission parameter in conjunction with the feature Vehicle Speed Sensor Tampering. The automatic transmission type in CELECT™ Plus can be enabled once the Vehicle Speed Sensor Anti-Tampering feature is enabled. The Vehicle Speed Sensor Anti-Anti-Tampering feature needs to know the transmission type in order to properly activate transmission specific anti-tampering detection software.
Top 2 Transmission Type parameter interacts with the Transmission Type parameter. Top 2 Transmission Type can be chosen once the Transmission Type of Partially Automated has been enabled.
NOTE: The Spicer AutoMate-2 transmission shares a programmable pin-out with Centinel™ hardware. The Top 2 Transmission Type parameter can not be Spicer when Centinel™ system hardware is installed.
Pulse Width Modulation Output Type: This adjustable parameter is available when a variable speed fan, using Pulse Width Modulation frequency control, is not installed on the vehicle.
Special Instructions
The adjustable parameter Activate Top 2 with Cruise Control Switch requires an OEM supplied cruise control on/off switch.
If the parameter Activate Top 2 with Cruise Control Switch is enabled, cruise control is available when Top 2 is available.
Disadvantages
The Spicer AutoMate-2 transmission shares a programmable pin-out with Centinel™ hardware. The Top 2 Transmission Type parameter can not be Spicer when Centinel™ system hardware is installed.
When the Pulse Width Modulation Output type is incorrectly set transmission shift complaints are likely.