ZF Ecomat

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The ZF Ecomat series was a series of transmissions for buses and was first introduced in 1980. The Ecomat transmissions were able to be equipped with a retarder and feature neutral vehicle stop. The Ecomat transmissions were offered in 4 or 5 or 6 speed variants.


Transmission naming decipher

xHP-xxx

xHP = Number of Gears

  • Available Values
    • 4
    • 5
    • 6

xHP = Hydraulic converter and Plantary Gearset

xHP-xxx = Series of input torque acceptance

  • 50x
    • General Usage
      • 30-35 foot buses
  • 59x
    • General Usage
      • 40-45 foot buses
  • 60x
    • General Usage
      • Motorcoaches
      • Artic buses
  • xHP-xx4
    • Series
      • 0 Original generation of transmission
      • 2 Second generation introduced in 2001
      • 4 Third generation introduced in 2006

For example 5HP-592 equals ZF Ecomat II five speed transmission which is capable of receiving 1250mm of input torque via the engine's flywheel. Which is generally used on 35-45 foot transit buses.

Differences

Thoughout the years, there has been technological improvements that were made to the transmission

The Ecomat 2

  • New CAN Shift module thus the C after the name
  • New 5HP-602 Verison available using alternative gear ratios (2.81 1.84 1.36 1.00 0.80)
  • Upgraded Electronics

The Ecomat 4

  • Topodyn to regulate shifting based on topograhy - Up until now the Ecomat has been supplied with a pre-set gear points. Using performance settings ranging from Super Economy up to Power. Availible starting in 2008
  • Increased torque on the HP604C

Specs

Type (5 or 6 speed) Max. input torque Max. input speed Mass w/ retarder 1 2 3 4 5 6 R
HP502C 1100 Nm 2800 355 kg 3.43 2.01 1.42 1 0.83 0.59 4.84
HP552C N/A N/A N/A 3.43 2.01 1.42 1 0.83 0.59 4.84
HP592C 1250 Nm 2800 357 kg 3.43 2.01 1.42 1 0.83 0.59 4.84
HP602C* 1600 Nm 2650 368 kg 3.43 2.01 1.42 1 0.83 0.59 4.84
HP504C 1100 Nm 2800 355 kg 3.43 2.01 1.42 1 0.83 0.59 4.84
HP554C 3.43 2.01 1.42 1 0.83 0.59 4.84
HP594C 1250 Nm 2800 357 kg 3.43 2.01 1.42 1 0.83 0.59 4.84
HP604C 1750 Nm 2650 368 kg 3.43 2.01 1.42 1 0.83 0.59 4.84