Government Procurement Case and Bid-Winning Solution Analysis of the EHY5045TWCE6 Sewage Treatment Vehicle (3308 Wheelbase) in Qingdao In a public tender issued in 2026 by a municipal sanitation department in one district of Qingdao City, an EHY5045TWCE6 sewage treatment vehicle became the focal point. Specifically designed for urban emergency sewage treatment, river dredging, and industrial wastewater transportation, its budget was capped at approximately RMB 358,000 (per publicly available tender information). Based on this case, this article conducts an in-depth analysis of its engine selection rationale, compares the performance differences among 85 kW, 100 kW, and 120 kW power options, and provides configuration recommendations from Chengli Special Purpose Vehicles to serve as a reference for similar procurement projects. I. Case Background and Requirements Analysis A municipal sanitation department in Qingdao planned to procure a sewage treatment vehicle with a 3308 mm wheelbase, primarily intended for sewage collection and transport in coastal areas, low-lying zones, and industrial parks. Key requirements included: - Compliance with China VI emission standards, enabling nationwide registration and annual inspection; - An engine suitable for Qingdao’s mixed terrain—featuring both hilly and coastal plain conditions; - A superstructure equipped with a high-capacity sewage tank and a high-efficiency self-priming pump; - A budget of approximately RMB 320,000, with unit price expectations ranging between RMB 313,000–391,000 (per local procurement conventions). After comprehensive evaluation, the EHY5045TWCE6 solution offered by Chengli Special Purpose Vehicle Co., Ltd. was selected as the winning bid, delivering one unit. Customer feedback indicated stable performance during the trial period, fuel consumption meeting expectations, and prompt after-sales service response. For further details, please contact Chengli Sales Manager Zhang Yue () or call the official hotline at . II. Engine Comparison: Differences and Selection Logic Among 85 kW / 100 kW / 120 kW Options This model offers multiple engine options, covering a power range from 85 kW to 120 kW. The following comparison is conducted across three dimensions: power output, fuel consumption, and adaptability to plateau vs. plain environments. 1. 85 kW Engine: Entry-Level Configuration, Suitable for Light Loads on Plains The 85 kW engine (approx. 116 hp) serves as the base configuration, commonly paired with Dongfeng or Foton chassis. In Qingdao’s plain regions, it delivers sufficient power for routine sewage transport (fully loaded weight approx. 3–5 tons), with average fuel consumption of about 12–14 L/100 km (per publicly available tender data). However, under continuous uphill driving (e.g., in Qingdao’s Laoshan District) or heavy-load conditions (exceeding 5 tons), power output may become insufficient, resulting in prolonged acceleration times. 2. 100 kW Engine: Balanced Option, Ideal for Mixed Terrain The 100 kW engine (approx. 136 hp) formed the core of the winning bid solution. It strikes an optimal balance between power and fuel efficiency: - On plain highways: fuel consumption averages 13–15 L/100 km; - In hilly terrain: ample power reserve ensures stable engine RPM during climbs; - For high-altitude operation (e.g., above 3,000 m elevation): calibration adjustments are required—but unnecessary in Qingdao’s local environment. Customer feedback: Compared to the 85 kW version, the 100 kW variant increases fuel consumption by only 1–2 L/100 km in Qingdao’s mixed terrain, yet delivers significantly improved throttle response and dynamic performance. 3. 120 kW Engine: High-Performance Version, Optimized for High Altitude and Heavy Loads The 120 kW engine (approx. 163 hp) is specifically engineered for high-altitude operations and heavy-duty applications…