US: Heavy-duty: CBD
Overview
The Central Business District (CBD) Cycle is a chassis dynamometer testing procedure for heavy-duty vehicles (SAE J1376). The CBD cycle represents a “sawtooth” driving pattern, which includes 14 repetitions of a basic cycle composed of idle, acceleration, cruise, and deceleration modes.
Categories
Description
Vehicle speed over the duration of the CBD cycle is shown below:
CBD Driving Cycle
The following parameters are characteristic of the cycle:
- Duration: 560 s
- Average speed: 20.23 km/h
- Maximum speed: 32.18 km/h (20 mph)
- Driving distance: 3.22 km
- Average acceleration: 0.89 m/s2
- Maximum acceleration: 1.79 m/s2