The Weichai WP10CD264E200 is a high-performance marine auxiliary diesel engine from Weichai Power Co., Ltd., part of the renowned WP10 series engineered for demanding secondary power roles on mid- to large-sized commercial vessels, including fishing trawlers, coastal cargo ships, passenger ferries, workboats, tugboats, supply vessels, and offshore support craft. This turbocharged and intercooled, 4-stroke, inline 6-cylinder unit is optimized for generator set (genset) applications in the 200–250 kVA range (at 50 Hz), powering critical onboard systems such as electrical distribution, refrigeration, hydraulic winches, bilge pumps, navigation electronics, cranes, and emergency backups, where operators emphasize rapid load response, superior fuel economy, low noise and vibration, and unwavering reliability amid variable demands typically at 50–80% load factor in corrosive saltwater environments.
At the core of its design is a robust 9.726-liter displacement (126 mm bore × 130 mm stroke) with a compression ratio of 17.0:1, delivering a prime rated power of 240 kW (326 hp) at 1500 rpm and a standby overload capacity of up to 264 kW for 1 hour every 12 hours—precisely calibrated for 50 Hz marine gensets to maintain stable frequency and voltage with under 5% speed droop during sudden load fluctuations, while producing peak torque exceeding 1,500 Nm for instantaneous acceleration and smoke-free transients, thanks to the efficient Holset or equivalent turbocharger, air-to-water aftercooler, and high-pressure direct injection system (up to 1,600 bar). The Bosch P7100-style inline mechanical fuel pump, integrated with an all-speed mechanical or optional electronic governor, ensures precise fuel metering and throttle control without reliance on sensitive electronics vulnerable to salt spray or humidity, and clockwise rotation (viewed from flywheel end) facilitates standard marine alternator coupling—making it ideal for fleets prioritizing mechanical simplicity and zero-fail operation over high-tech dependencies.
Fuel efficiency is a primary concern for vessel owners optimizing profitability on long voyages, and the WP10CD264E200 excels with industry-leading thrift: specific fuel consumption averages 195–200 g/kWh at best economy points, with full-load rates around 54 L/h—offering 8–12% better performance than comparable legacy engines, often recouping investment in 12–18 months through reduced bunker costs on typical fishing, towing, or coastal routes, while supporting biodiesel blends up to B20 for sustainable compliance. It adheres to IMO Tier II and China Stage II emission standards (NOx <7.2 g/kWh, particulates <0.2 g/kWh) via refined combustion chamber tuning, low-restriction intake, and optimized exhaust, eliminating the need for costly aftertreatment like SCR or DPF and enabling seamless certification for emission-controlled harbors, inland waterways, and international coastal zones without fines, retrofits, or operational restrictions.
Durability in marine service is paramount for users combating corrosion, moisture, and constant vibration, and this engine is fortified accordingly: the one-piece cast-iron frame-style block and cylinder head, featuring wet replaceable liners with plateau honing for superior heat transfer and wear resistance, are paired with a forged steel crankshaft, nitrided connecting rods, and comprehensive anti-corrosion measures including zinc anodes, multi-layer epoxy coatings, and stainless fittings to resist galvanic action from brine exposure—routinely delivering 10,000–12,000 hours of service life before major overhaul with standard maintenance. The closed-loop freshwater cooling system with integrated marine heat exchanger and seawater pump (coolant capacity ~22 L, separate raw-water circuit) sustains jacket temperatures at 85–95°C in ambient extremes up to 45°C and 95% humidity, preventing overheating during extended idling or tropical transits and outperforming belt-driven raw-water pumps in impeller longevity. Oil sump holds 18–20 L of 15W-40 marine-grade lubricant for reliable pressure-fed lubrication, while the balanced rotating assembly with resilient mounts limits noise to under 100 dB(A) at 1 meter and vibrations to ISO 8528 G2 levels—enhancing crew comfort on noise-sensitive ships, reducing fatigue-related incidents, and minimizing hull stress over prolonged deployments.
Practical integration and ownership appeal to shipyards and fleet managers seeking minimal hassle: dry weight is approximately 850 kg, with overall dimensions of about 1,600 mm (L) × 800 mm (W) × 1,200 mm (H) for straightforward fitment into auxiliary engine rooms without extensive modifications, arriving equipped with SAE 2 flywheel housing (SAE 1 optional), 24 V electrical system (7 kW starter, 80 A alternator; 12 V adaptable), exhaust elbow, and rear PTO provisions for direct accessory drives like air compressors—reducing commissioning time by 15–20% compared to bulkier alternatives. Maintenance is user-centric and cost-effective, with 250-hour intervals for oil/filter changes using accessible spin-on elements, top-mounted service points for injectors and belts, and optional LCD instrumentation for real-time monitoring and automatic alarms—no complex wiring or proprietary software to complicate at-sea diagnostics, potentially cutting unplanned downtime by 20–30% versus electronic-heavy rivals. Idle speed stabilizes at 650 ± 30 rpm for efficient low-load running, and CCS/IMO type-approval ensures quick classification society endorsements globally.
