4 Cylinder Soundproof Diesel Engine

The 4 Cylinder Soundproof Diesel Engine is a water-cooled, four-stroke direct-injection engine for 40–60 kW generator sets. With naturally aspirated and turbocharged options, it provides flexible power configurations for standby, industrial and off-grid applications.

Inline-4 Architecture & Firing Order
In-line four-cylinder configuration with a 1-3-4-2 firing order. The same cylinder arrangement is used across the ZH490G, ZH4102G, ZH4102ZG and R4105ZP engine models.

Bore & Displacement Options
Bore and stroke range from 90 × 100 mm to 105 × 125 mm, with total displacement from 2.544 L to 4.33 L across the available engine models.

Direct Injection & Aspiration
All models use direct fuel injection. ZH490G and ZH4102G are naturally aspirated, while ZH4102ZG and R4105ZP use turbocharged intake configurations.

Lubrication & Rotation
All four models use combined pressure-and-splash lubrication. Crankshaft rotation is counterclockwise when viewed from the output end.

The four engine models cover a 40–60 kW rated power range at 2,000–2,400 r/min, allowing selection according to the required generator-set output and operating conditions.

Power & Speed Selection
ZH490G provides 40 kW at 2,400 r/min, while ZH4102G, ZH4102ZG and R4105ZP provide 42–60 kW at 2,000 r/min. Naturally aspirated and turbocharged configurations are available for different power requirements.

Fuel & Cooling
Fuel consumption is rated at ≤243–251.6 g/kWh depending on the engine model and operating condition. All four models use forced water cooling to maintain stable engine temperature during continuous operation.

Alternator Options
Generator sets can be configured with Stamford, Leroy Somer, Marathon, Mecc Alte and selected domestic alternator brands according to project requirements.

Voltage & Frequency
Electrical output can be configured from 220V to 690V, with 50Hz or 60Hz options according to the selected generator configuration.

Output Configuration
The generator-set electrical configuration can be specified according to the application, including the required phase and matching alternator arrangement.

Fuel Tank Configuration
Fuel tank capacity can be specified according to the required operating time and generator-set configuration.

Incoming & Dimensional Inspection
Raw materials and key engine components undergo incoming and dimensional inspection before production and assembly.

Machining & Component Testing
Critical components are checked through cylinder block pressure testing, crankshaft dynamic balancing, fuel injection pump calibration and injector testing.

System Testing
Cooling-system leakage, lubrication pressure and electric starting systems are checked before final performance testing.

Performance Verification
Generator sets undergo noise verification, rated-load performance testing, continuous running tests and fuel consumption checks before shipment.