Government Procurement Case and Solution Analysis of the EHY5045TWCE6 Sewage Treatment Vehicle (3308 mm Wheelbase) in Nanchang — 2025. In 2025, a municipal sanitation department in a district of Nanchang faced daily cleaning pressure at urban river channels and domestic sewage discharge points. Aging sewage treatment vehicles—due to insufficient chassis load capacity and frequent upper-structure failures—caused operational efficiency to drop by over 40%. Following a public tender, three units of Chengli Special Purpose Vehicle Co., Ltd.’s EHY5045TWCE6 sewage treatment vehicle were delivered for high-frequency, high-load sewage suction and transfer operations. This article provides a detailed analysis from four perspectives: case background, equipment selection, advantages of heavy-duty design, and common issues. I. Case Background: Equipment Pain Points Under High-Frequency Operations The municipal sanitation department is responsible for routine maintenance of sewage manholes and river discharge outlets across 15 residential communities within its jurisdiction. Daily operation time exceeds eight hours, with each vehicle required to complete approximately 10–15 suction tasks per day. The existing equipment exhibited the following key issues: • Insufficient Chassis Load Capacity: The original chassis was light-duty truck-class; prolonged full-load operation led to severe wear on tires and suspension systems, resulting in high maintenance frequency. • Upper-Structure System Failures: Vacuum pumps and piping suffered frequent breakdowns under continuous high-load operation, incurring annual repair costs exceeding RMB 20,000, with each downtime lasting 3–5 days. • Regulatory Compliance Limitations: Some older models failed to meet China VI emission standards, rendering them ineligible for annual inspection and commercial operation in urban areas. Per local procurement practice, the department’s budget was capped at approximately RMB 342,000 per unit, requiring the vehicle to be licensable under a Class C1 driver’s license, compliant with China VI emission standards, and capable of sustaining continuous operation for over eight hours per day. II. Equipment Selection: Technical Specifications and Configuration of the EHY5045TWCE6 After multiple rounds of comparative evaluation, Chengli’s EHY5045TWCE6 sewage treatment vehicle secured selection based on the following core parameters: • Chassis Model: Dongfeng EQ1045SJ3CDF (China VI compliant), wheelbase 3308 mm—15% higher load capacity than the previous generation. • Upper-Structure System: Equipped with Chengli’s self-developed high-efficiency vacuum pump, achieving 20% faster suction speed and a maximum suction depth of 8 meters. • Tank Capacity: Effective volume approx. 3.5 m³—meeting single-operation suction requirements and reducing return trips for discharge. • Announcement Number: EHY5045TWCE6; fully compliant with blue-plate registration regulations, enabling nationwide registration. Below is a comparative table highlighting key differences between this model and competing products in the market: | Parameter | Chengli EHY5045TWCE6 | Market Competitor A (Light-Duty Chassis) | Market Competitor B (Medium-Duty Chassis) | |-----------|----------------------|------------------------------------------|--------------------------------------------| | Chassis Type | Dongfeng EQ1045SJ3CDF (China VI) | Foton Aoling (China V) | FAW J6 (China VI) | | Wheelbase (mm) | 3308 | 3360 | 3500 | | Tank Volume (m³) | 3.5 | 3.0 | 4.0 | | Suction Rate (m³/min) | 0.8 | 0.6 | 0.7 | | Required Driver License | C1 | C1 | B2 | | Reference On-Road Price (RMB 10,000) | ~11–13 (per publicly disclosed tender data) | ~9–11 (per publicly disclosed tender data) | ~15–18 (per publicly disclosed tender data) | | Warranty Policy | Nationwide Dongfeng chassis warranty network,