Xianyang Dongfeng Yizhan Sewage Treatment Vehicle Government Procurement Case: Engine Power and Solution Analysis In 2025, a municipal sanitation department, responding to urban sewage treatment requirements, procured three sewage treatment vehicles (model CLW5070GSSD6) manufactured by Chenglí Special Purpose Vehicle Co., Ltd. These vehicles are primarily deployed for sewage treatment in urban low-lying areas and emergency drainage operations. The tender documents explicitly required high-efficiency sewage treatment capability and adaptability to complex urban road conditions. Based on customer requirements, Chenglí offered configuration options built upon the Dongfeng chassis, featuring engines with different power outputs. This article analyzes the selection rationale for this procurement batch from perspectives including engine power differences, fuel consumption comparison, and adaptability to plateau vs. plain environments—supported by real-world delivery cases. I. Project Background and Vehicle Configuration All three sewage treatment vehicles in this procurement batch utilize the Dongfeng Yizhan chassis, with superstructures independently developed by Chenglí. According to publicly available tender information, the total project budget was capped at approximately RMB 1.339 million, with an average unit price of around RMB 400,000. Chenglí’s proposal included three engine power options: 85 kW (~115 hp), 100 kW (~136 hp), and 120 kW (~163 hp). Considering local operational conditions—including its location in a plain city, average daily driving distance of 50–80 km, and typical working duration of 4–6 hours—the purchaser selected the 100 kW configuration. For detailed model selection consultation, contact Chenglí’s official hotline at or Sales Manager Zhang Yue at . Customer feedback indicates that these vehicles are operating stably, with fuel consumption performance meeting expectations. II. Comparative Analysis of Engine Power Differences Engine power directly influences both vehicle drivability and operational efficiency of the sewage treatment system. The following comparison is based on parameters published by the Ministry of Industry and Information Technology (MIIT) for model CLW5070GSSD6, supplemented by real-world usage data: Dongfeng Yizhan Sewage Treatment Vehicle Engine Configuration Comparison (based on model CLW5070GSSD6) | Parameter | 85 kW (~115 hp) | 100 kW (~136 hp) | 120 kW (~163 hp) | |-----------|------------------|-------------------|-------------------| | Reference Engine Model | YC4FA115-50 | YC4FA136-50 | YC4E160-56 | | Displacement (L) | 2.98 | 3.76 | 4.26 | | Max Torque (N·m) | 325 | 400 | 520 | | Fuel Consumption (L/100 km, reference operating condition) | ~12–14 | ~13–15 | ~16–18 | | Maximum Speed (km/h) | 90 | 100 | 110 | | Recommended Application Scenarios | Plain terrain, light-load, short-distance operations | Plain/hilly terrain, routine operations | Plateau regions, heavy-load, long-distance operations | Analysis: The 85 kW engine delivers the lowest fuel consumption, making it suitable for light-load, short-distance applications; however, it lacks sufficient power for uphill driving or full-load operation, potentially reducing sewage pump efficiency. The 100 kW engine strikes an optimal balance between fuel economy and power output, satisfying urban road conditions and moderate load demands. The 120 kW engine offers the highest power but incurs significantly higher fuel consumption, best suited for plateau environments or areas requiring frequent climbing. In this Xianyang case, the purchaser opted for the 100 kW configuration, aligned with local...