TIER 3 Mechanical Engine VS TIER 4 Electronically Controlled Engine

We all know that the higher the emission standard, the more advanced the engine technology, but it does not mean that it is suitable for all working conditions. For example, in some countries with high emission standards request, it is obvious that TIER 4 electronically controlled engine construction machinery is more suitable. But in some countries where there is no emission standard requirement and the oil quality is too poor, TIER 3 mechanical engine construction machinery is more suitable for the requirement. This is due to the fact that lower emission engines are simpler and more adaptable to the environment. The following is a comparison of the advantages and disadvantages of the two engines.

 

1. TIER 3 Mechanical Engine Details.

 

a. Emission standard: the difference between TIER 3 engine and TIER 4 engine lies in the content of harmful substances in the exhaust emission of the engine, and the content of harmful substances in the exhaust emission of TIER 4 engine is lower than that of TIER 3 engine.

 

b. Engine construction: TIER 3 engine and TIER 4 engine oil supply system is different, TIER 4 engine in TIER 3 engine based on the improvement of the internal structure, TIER 4 engine compared to TIER 3 engine cost is much higher.

 

c. Adaptability: TIER 3 engine machinery has stronger environmental adaptability and can better adapt to different working environments and conditions. Especially adapt to the harsh mining conditions, as well as low fuel quality requirements.

 

d. Maintenance cost: TIER 3 engine machinery has lower maintenance cost, it has better reliability and lower maintenance cost, thus reducing the user's maintenance cost and saving money.

 

 

2. TIER 4 Electronically Controlled Engine Details.

 

Advantages of TIER 4 engine:

 

a. Reduced emissions and environmental performance: The TIER 4 engine significantly reduces NOx and PM particulate emissions by adopting low-pressure combustion and combustion control technology, which is in line with modern environmental protection requirements and helps reduce environmental pollution.

 

b. Improvement of fuel utilisation: The TIER 4 engine improves fuel utilisation through advanced combustion technology, making the excavator more economical and efficient in operation.

 

c. Outstanding working capacity and high load capacity: the TIER 4 engine excavator is equipped with a powerful engine and power system, providing excellent driving and construction capacity. Its hydraulic system ensures smooth operation and provides stable and efficient working performance. The body structure is sturdy and durable, capable of coping with harsh working conditions, and offers good stability and precision when digging, loading and unloading.

 

 

Disadvantages of TIER 4 engine:

 

a. Higher price: Because the TIER 4 engine uses more advanced emission treatment technologies, it is more expensive and does not add significant value in areas or for users with low market demand.

 

b. Increased maintenance costs: The TIER 4 engine uses more sophisticated emission control technology, and its maintenance costs have increased accordingly. Repairing or replacing corresponding accessories such as emission controllers, filters and nozzles is also time and money consuming.

 

c. Inadequate adaptability: In harsh or complex construction sites, the TIER 4 engine may not be as adaptable as the TIER 3 engine, and its performance and stability may be compromised. Especially the bad oil will cause the injector nozzles to be clogged frequently.