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- Overview
- Related Products
⚙️ I. Core Performance Parameters
Power Configuration
Rated power: 50kW (main use), standby power: 55kW, to meet the needs of small and medium-sized loads.
Overload capacity: support 110% load (within 1 hour), to adapt to the sudden increase in power demand.
Fuel consumption: ≤230g/(kW-h) (100% load), energy saving is better than similar products.
Environmental adaptability
Altitude ≤1000m (power correction is required for over altitude), high temperature (40℃) and high humidity (humidity ≤60%) resistant environment.
Emissions in line with national standards, smoke ≤ 3.7FSN, noise ≤ 118dB (A).
🔧 Second, engine technical characteristics
Power structure
Four-stroke turbocharging: 4-cylinder direct injection design (bore × stroke: 108 × 115mm), displacement 4.214L, compression ratio 17.5:1, to improve combustion efficiency.
Reinforced components: Integral forged steel crankshaft, alloy cast iron cylinder head, with high pressure forging process, high wear resistance and fatigue strength.
Speed control mode: mechanical or electronic speed control is optional (different model configurations), ensuring stable speed (1500rpm).
Reliability and Maintenance
Overhaul cycle exceeds 12,000 hours, low lubricant consumption (Yuchai proprietary piston ring sealing technology).
The filtration system adopts an integral replacement type of three filters (oil, diesel, air), reducing maintenance complexity.
🔌 III. Generator and Control System
Generator characteristics
Brushless excitation + AVR: voltage fluctuation rate ≤ ± 0.5%, transient voltage adjustment rate ≤ ± 15%, to ensure stable output.
High protection level: IP23 protection, H-class insulation, adapting to dusty and humid environment.
Intelligent control
Self-start/self-stop: 0-30 seconds delayed start after utility power interruption (success rate 99%), automatic cooling stop after power supply recovery (0-300 seconds adjustable).
Multi-protection: real-time monitoring of overspeed, high water temperature, abnormal voltage (overvoltage/undervoltage/overcurrent) and other faults, and triggering alarm or shutdown.
Human-computer interaction: full Chinese LCD screen, support for custom storage of parameters (FLASH memory chip), power-down does not lose settings.
🏭 Fourth, the structure and application scenarios
Compact design
Size: 1880×760×1120mm, weight 1020kg, easy for fixed installation or mobile deployment.
Industrial-grade silencer as standard to reduce operation noise.
Typical Applications
Emergency back-up power supply: Uninterruptible power supply for hospitals, data centres, communication base stations.
Engineering power supply: the main power supply of construction sites, mining areas and other scenes without utility power.
Special environment: harbours, airports and other places with requirements on noise and emission.
💰 V. Cost performance and after-sales service
Price range: 19,800-2,350,000 yuan per unit (basic configuration), lower than similar international brands.
Warranty policy: 14 months or 1500 hours long three packages (domestic leading).
National service network: Yuchai's 1,168 service stations cover, providing fast maintenance and technical support.
💎 Summary
The core advantage of YC4D90Z-D25 lies in the triple combination of ‘High Reliability + Low Fuel Consumption + Intelligent Control’:
👉 Classic power platform (YC4D series over 500,000 units market proven) + High-efficiency electrical performance (brushless excitation, AVR voltage stabilisation)
👉 Low operation and maintenance costs (fuel/lubricant consumption is double excellent) + strong environmental adaptability (high temperature, high humidity, altitude)
👉 Intelligent interaction (self-starting logic, multiple protections, programmable parameters)
Suitable for industrial users in pursuit of cost-effective and long-term stability, especially recommended as the main model for backup power in hospitals, construction sites, communications and other scenarios.
