GMW GMW3082 PDF

Note: Nothing in the specification supersedes applicable laws and regulations unless specific exemption has been obtained.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose.

This test procedure is used to validate the powertrain cooling performance capability for coolant, engine oil, and transmission oil, by reproducible measurements in the climatic wind tunnel.

Foreword.

Not applicable.

Applicability.

For all passenger vehicles and multipurpose vehicles.

Definitions.

Soak: Vehicle stopped, automatic transmission shifted to Park, manual transmission shifted to Reverse with the clutch pedal released, and ignition turned off.

W.O.T: Full throttle application, through the detent. Reduce throttle as necessary to eliminate wheel spin. An A/C cut off at W.O.T. is allowed.

Idle: Engine operating with no operator input to the throttle. An Automatic transmission may be in Drive, Neutral or Park as specified. A manual transmission should be in Neutral with the clutch pedal released. In both cases, the service brake should be released unless otherwise specified. The parking brake may be applied to prevent rolling.

Stabilized Conditions: Road load and grade load measurements shall be considered stabilized when radiator top (inlet) temperature is ± 1°C, engine oil sump and transmission sump temperature is within ± 1°C, in a minute time period. If temperatures do not stabilize, test condition terminates after 45 minutes.

Road Load (RL): The force required to move a vehicle on level stretches without acceleration.

Grade Load (GL): The force required to operate a vehicle on stretches of road along which the slope changes in the direction of travel.

Trailer Grade Load (TGL): The force required to operate a vehicle and specified trailer on stretches of road along which the slope changes in the direction of travel.

Gross Vehicle Mass Rating (GVMR): A value specified by the manufacturer as the load carrying capacity of the vehicle as measured at the tire-ground interfaces. It is the sum of:

• Curb Mass

• Dealer Installed Options Mass

• Luggage/Cargo/Occupant Mass

• Build Variation

Gross Combined Vehicle Mass (GCVM): Gross Vehicle Mass Rating plus the addition of a specified trailer per the VTS.

Acceleration and Deceleration: Unless otherwise specified, the acceleration and deceleration rates should be within 8 and 10 kph/s.