China Heavy-Duty Commercial Vehicle Test Cycle (CHTC)

China heavy-duty commercial vehicle test cycle (中国重型商用车辆行驶工况) is a part of the China automotive test cycle (CATC) developed by the China Automotive Technology & Research Center (CATARC). The CHTC is defined by national standard GB/T38146.2, China Automotive Test Cycle Part 2: Heavy-duty Commercial Vehicles, released in October 2019 and applicable from May 2020. The CHTC test replaced the C-WTVC (a modified version of WHVC) for the purpose of vehicle certification.

The CHTC includes six chassis dynamometer driving cycles for various types of heavy commercial vehicles with GVW>3500 kg:

• CHTC-B: China heavy-duty commercial vehicle test cycle for city buses (城市客车行驶工况),
• CHTC-C: China heavy-duty commercial vehicle test cycle for inter-city coaches (客车（不含城市客车）行驶工况).
• CHTC-LT: China heavy-duty commercial vehicle test cycle for light trucks of GVW≤5500 kg (货车（GVW≤5500kg）行驶工况).
• CHTC-HT: China heavy-duty commercial vehicle test cycle for heavy trucks of GVW>5500 kg (货车（GVW>5500kg）行驶工况).
• CHTC-D: China heavy-duty commercial vehicle test cycle for dump trucks (自卸汽车行驶工况).
• CHTC-TT: China heavy-duty commercial vehicle test cycle for tractor trailers (半挂牵引车行驶工况).

These test cycles are shown in the following figures. The test cycles are divided into phases of increasingly faster driving, as indicated.

Selected characteristics of the six CHTC test cycles are listed in Table 1.