Diesel Engine Model Nomenclature and Compilation Method
To ensure proper standardization and management of diesel generators, the state has established uniform guidelines for naming and compiling the models of diesel generator sets. These rules allow for consistent and clear identification of generator specifications. Below is an explanation of the model structure used for diesel generator sets:
1. Rated Power (kW)
- The number in the first section of the model indicates the generator set’s rated power in kilowatts (kW).
2. Type of Output Current
- The letter in this section represents the type of electrical output produced by the generator:
- G: Power frequency (AC)
- P: Intermediate frequency (AC)
- S: Dual frequency (AC)
- Z: Direct current (DC)
3. Generator Set Type
- This section denotes the intended use or type of generator:
- F: For land use
- FC: For marine use
- Q: For steam generator power stations
- T: For hanging generator sets
4. Control Features
- This part indicates the control characteristics of the generator set:
- If absent, the model is manually operated.
- Z: Automatic control model
- S: Low noise model
- SZ: Low noise and automatic model
5. Design Serial Number
- This number corresponds to the design serial number of the generator set.
6. Variant Code
- A number denoting a variant or modification of the original design.
7. Environmental Characteristics
- This section identifies the environmental conditions for which the generator set is designed:
- If absent, it refers to the standard “Zengtong” type.
- TH: Humid tropical type.
Example Models:
- 120GF18: A diesel generator set with a rated power of 120 kW, AC power frequency, land use, and a design serial number of 18.
- 40GFS3: A diesel generator set with a rated power of 40 kW, AC power frequency, land use, low noise, and a design serial number of 3.
Diesel Engine Model Nomenclature
The model of a diesel engine is defined according to the national standard GB/T 725-2008, “Rules for Compiling Product Names and Models of Internal Combustion Engines.” The engine model consists of eight key components, each representing specific characteristics:
1. Company or Product Serial Number
- The first section represents the product serial number or the company code. If not filled, it indicates an individual diesel engine.
2. Replacement Symbol
- The second section represents the symbol for a replacement engine. If blank, it refers to an individual engine.
3. Number of Cylinders
- This section specifies the number of cylinders in the diesel engine (e.g., 1, 2, 4, 6, 12, etc.).
4. Engine Type Code
- If absent, the engine is considered in-line or single-cylinder horizontal. If marked with V, it denotes a V-shaped engine arrangement.
5. Stroke Type
- If filled with E, the engine is a two-stroke diesel. If empty, it indicates a four-stroke diesel engine.
6. Structural Feature
- This symbol indicates the structural features of the engine:
- Absence means the engine is a water-cooled type with a 140mm stroke.
- A: Water-cooled, 150mm stroke.
- F: Air-cooled.
- Z: Supercharged.
- ZL: Turbocharged and intercooled.
7. Usage Characteristics
- This part defines the specific usage of the engine:
- Absence means the engine is a general or basic type.
- T: Agricultural type.
- G or absence: General or basic type.
- Q: Unit type.
- D: Power station use.
- K: Construction machinery.
- J: Engine unit.
- C: Marine right-turn engine.
- Ca: Marine left-turn engine.
8. Variant Code
- Absence indicates a standard design. 1 represents the first variant, and 2 represents the second variant.
Example Models:
- 6135AZD-1: A 6-cylinder in-line, four-stroke diesel engine with a 135mm cylinder bore, 150mm stroke, water-cooled, supercharged, for power station use, and the first variant design.
- 12V135D: A 12-cylinder, V-shaped, four-stroke diesel engine with a 135mm cylinder bore, 140mm stroke, water-cooled, for power station use.