The introduce to Holset turbochargers:
The predecessor of the Holset turbochargers was the British Holset Engineering Company, which was established in 1952 and was acquired by Cummins in 2006, officially renamed as Cummins Turbocharger Technology System. Its headquarters is located in Huddersfield, West Yorkshire, UK, and its production bases are distributed in the UK, Brazil, China, the Netherlands, India and the United States. It also has R&D centers in the UK and China. The Holset turbochargers holds a very important position in the field of turbochargers for automobiles.
Product features of Holset turbochargers:
- Advanced technology: Holset turbochargers incorporate a variety of advanced technologies, such as variable geometry turbocharging (VGT), which uses axial sliding vanes. Compared to traditional rotating blade designs, it offers longer service life and higher reliability, providing sufficient power under various engine operating conditions, improving fuel economy, and expanding the effective speed range of the engine.
- Outstanding performance: The product has excellent transient response, enabling the manufacturer’s expected handling performance and response speed. It also enhances compression braking force, decelerates faster, and helps control exhaust gas recirculation, meeting emission regulations. For some models like the HE600 series, a new pressure housing and turbine housing design is adopted, resulting in an overall efficiency increase of 4% and even up to 5% in certain key application matches.
- Durable and reliable: For different application scenarios, Holset turbochargers select appropriate materials. For high-cycle applications, titanium rotors and cast iron pressure housings that are less prone to fatigue fractures are used to ensure the turbocharger’s excellent durability, safety, and reliability under harsh conditions.
Common problems with the Holset turbochargers:
Decreased boost pressure: This could be caused by dirty air filter elements, excessive debris on the air passages and impellers, excessive carbon deposits on the turbine blades of the booster or between the rotor and the sealing ring, or damage to individual parts of the booster. This fault can result in insufficient generator power, increased diesel consumption, and black smoke emission from the exhaust pipe, among other issues.
Abnormal vibration of the turbocharger: When the engine slows down and reduces load, the rotational speed of the turbocharger cannot decrease synchronously, resulting in a mismatch between the exhaust volume of the turbocharger and the demand of the diesel engine; if the diesel engine is overloaded or the load fluctuates greatly, the combustion state deteriorates, the exhaust temperature rises, and the exhaust energy increases, causing the rotor speed of the turbocharger to increase, thereby resulting in abnormal vibration.
Turbocharger oil leakage: It may be that the sealing ring at the turbine end is damaged, causing engine oil to leak from the turbine end and enter the exhaust pipe, resulting in blue smoke in the exhaust. It is also possible that the sealing ring or oil shedding ring at one end of the compressor impeller is damaged, allowing engine oil to enter the impeller cavity and then enter the combustion chamber with the air, causing blue smoke in the exhaust, and at the same time, there may be a phenomenon of power reduction.
Suppressor abnormal noise: If the turbocharger is damaged, such as the rotation shaft getting stuck or the impeller scraping the casing, it will produce a metallic friction noise; if the intake and exhaust pipes leak, or the intercooler has a crack, and pressurized gas leaks, it will emit a leakage sound; if the bypass valve diaphragm ruptures, pressurized gas leaks, it will also produce abnormal noise; if there are burrs or protrusions on the inner wall of the housing, when the high-speed gas flows through, it will produce abnormal noise; if the impeller surface is contaminated with dirt, and the gas flow is not smooth, it may also cause abnormal noise.
Suppressor abnormal noise: If the turbocharger is damaged, such as the rotation shaft getting stuck or the impeller scraping the casing, it will produce a metallic friction noise; if the intake and exhaust pipes leak, or the intercooler has a crack, and pressurized gas leaks, it will emit a leakage sound; if the bypass valve diaphragm ruptures, pressurized gas leaks, it will also produce abnormal noise; if there are burrs or protrusions on the inner wall of the housing, when the high-speed gas flows through, it will produce abnormal noise; if the impeller surface is contaminated with dirt, and the gas flow is not smooth, it may also cause abnormal noise.
The Holset turbochargers are mainly used in commercial vehicles, construction machinery, mining equipment, marine power and generator sets, etc. It is widely used by numerous manufacturers, including domestic well-known enterprises such as FAW heavy truck, Dongfeng Cummins engine parts, China Heavy Industry, and Weichai engine parts, as well as international renowned engine manufacturers like Volvo, Scania, and Fiat. For example, models like Dongfeng Tianlong and Jiangling Weilong HV5 heavy trucks all use Holset turbochargers. For the heavy truck parts purchased from ZK truck parts, a 3-year warranty service will be provided, ensuring your after-sales.
