Jiujiang Municipal Government Procurement Case for the 3308 Sewage Treatment Vehicle EHY5045TWCE6: Engine Comparison and Selection Analysis In a 2026 municipal sanitation department procurement project, the Chengli EHY5045TWCE6 sewage treatment vehicle based on Dongfeng chassis emerged as a key contender. This model is built on a Dongfeng chassis and offers three engine power options (85 kW / 100 kW / 120 kW), engineered to meet operational demands across both plain and high-altitude environments. Customer feedback indicated that, after comparative evaluation of fuel consumption and performance, Chengli Special Purpose Vehicle’s solution was ultimately selected. The following analysis examines selection rationale from the perspectives of engine differentiation, fuel consumption comparison, and plain/high-altitude adaptability. I. Project Background A municipal sanitation department (based on publicly available tender information) planned to procure five sewage treatment vehicles for urban sewer network cleaning and emergency response operations. The budget cap was approximately RMB 885,000 per unit, with requirements including high off-road capability, low fuel consumption, and stable emissions compliance. After multiple rounds of evaluation, Chengli Special Purpose Vehicle secured the order for three EHY5045TWCE6 units, leveraging its nationwide Dongfeng chassis warranty and lifetime upfit service support. The chassis configuration (referencing CLW5070GSSD6 official announcement parameters) supports optional engine installation. Customers specifically evaluated the suitability of the 85 kW, 100 kW, and 120 kW engines for plain-area operation (e.g., local Jiujiang conditions) versus high-altitude applications (e.g., prior municipal projects in Sichuan). II. Engine Comparison: Power Output, Torque, and Application Scenarios Per MIIT official announcement data (e.g., CLW5070GSSD6), significant differences exist among the three engine options in terms of power output and torque: • 85 kW Engine: Maximum power output of 85 kW, peak torque approx. 300 N·m. Optimized for plain-area urban roads; delivers lowest fuel consumption and suits short-haul transport and light-load operations. • 100 kW Engine: Maximum power output of 100 kW, peak torque approx. 350 N·m. Balanced for both plain-area and mild high-altitude use; suitable for most municipal sanitation applications, such as water-sprinkling or refuse collection vehicles. • 120 kW Engine: Maximum power output of 120 kW, peak torque approx. 400 N·m. Specifically engineered for high-altitude or heavy-load operations—e.g., four vacuum-suction cleaning vehicles deployed by Sichuan municipal authorities, capable of stable operation above 3,000 meters elevation. III. Fuel Consumption Comparison: Daily Operational Cost Analysis Based on test data provided by the procuring entity (per publicly available tender documentation), average fuel consumption per 100 km under standard operating conditions is as follows: Fuel Consumption Comparison Table (Urban Road Operating Conditions) Engine Power | Fuel Consumption (L/100 km) | Annual Operating Cost (20,000 km/year, RMB) | Applicable Scenario ---|---|---|--- 85 kW | 12–14 | ~24,000–28,000 | Plain-area, short-haul, light-load 100 kW | 14–16 | ~28,000–32,000 | Plain-area, medium-to-long-haul, general-purpose 120 kW | 16–18 | ~32,000–36,000 | High-altitude, heavy-load, emergency response Customer feedback confirmed that the 85 kW engine delivered the lowest fuel consumption in plain-area operations but exhibited marginal power reserve; conversely, while the 120 kW engine incurred higher fuel costs, it demonstrated consistent performance without power loss in high-altitude regions (e.g., Sichuan municipal case studies). IV. Plain- vs. High-Altitude Adaptability: Selection Insights from Real-World Cases Chengli Special Purpose Vehicle