1. Definition of Turbochargers​

A turbocharger is a type of air compressor. It uses the exhaust gas from the engine to drive a turbine, which in turn drives a compressor impeller to compress air. This increases the intake air volume of the engine, enabling more complete fuel combustion, enhancing power output, and achieving energy conservation and emission reduction. It is mainly composed of components such as the turbine housing and compressor housing, and is widely used in various fields including automobiles, machinery, and ships. Among them, the automotive industry has the largest demand, and it is applicable to both pure fuel vehicles and hybrid vehicles.​

2. Comparison of Technical Routes of Superchargers​

According to the power source, superchargers can be divided into mechanical superchargers, exhaust gas turbochargers, and electric superchargers. Mechanical superchargers are driven by the engine, with smooth power output, but they consume engine power and have low supercharging efficiency. Exhaust gas turbochargers utilize exhaust gas energy, which can improve thermal efficiency, reduce fuel consumption and emissions, and have seen a rapid increase in the configuration rate in the automotive field. Electric superchargers are driven by an electric motor, with extremely fast response, capable of eliminating turbo lag, and can be flexibly controlled for on – demand supercharging, but they have high requirements for the vehicle’s electrical system.​

3. Development Trends of the Turbocharger Industry​

Passenger car turbochargers emerged in the early 21st century. The domestic industry entered a rapid growth period in 2010 and reached a mature stage in 2018. In the global market, the total output from 2022 to 2024 fluctuated, and it is expected to decline in the future due to the development of pure electric vehicles. However, the penetration rate of turbochargers based on pure fuel power systems in light vehicles will increase, and demand will remain stable in the short term. In the domestic market, the sales volume of passenger car turbochargers in 2024 was approximately 14 million units, with a market size exceeding 10 billion yuan. The installation rates of traditional fuel vehicles and hybrid vehicles are both on the rise. The medium – and short – term growth of the industry is driven by the increase in penetration rate and the expansion of the automotive export market, while long – term growth depends on the expected increase in sales of hybrid vehicles.​

4. Competition Pattern of the Turbocharger Industry​

The global turbocharger market is oligopolistic, with five major mult

inational companies such as Garrett dominating. In the domestic market, international manufacturers also hold a dominant position, but local enterprises like Fengwo Supercharging are continuously improving their technology and scale, breaking the international monopoly.

Technical Route Comparison and Industry Development Trends of Turbochargers appears first in TF Turbo。

How Two-Stage Turbocharging Works:

Unlike single-stage turbos, two-stage systems employ a smaller, high-pressure (HP) turbo and a larger, low-pressure (LP) turbo. Exhaust gas first drives the HP turbine, which powers the HP compressor to pre-compress air from the LP compressor. The remaining exhaust energy then drives the LP turbine and compressor for further air pressurization. Bypass valves optimize performance across engine speeds, directing exhaust flow to either turbo as needed. This balanced approach enhances low-end torque, peak power, and altitude performance.

Types of Two-Stage Systems:

Cummins utilizes various two-stage configurations including:

• Sequential: Smaller turbo for low speeds, larger for high speeds, minimizing lag.
• Compound: Series setup for heavy-duty applications, maximizing boost and efficiency.
• Parallel: Dual turbos for V-engines, balancing power and response.
• Variable Geometry (VGT) in Two-Stage: Combining fixed and VGT turbos for optimized performance across speed ranges.

Advantages:

Two-stage turbochargers offer superior performance by:

• Improving fuel efficiency.
• Balancing low-end torque and high-end power.
• Enhancing performance at high altitudes.
• Providing quick torque response.
• Achieving high compression ratios efficiently.

Challenges:

Despite benefits, two-stage systems present engineering challenges:

• Packaging Constraints: Integrating dual turbos can be difficult in various engine designs.
• Thermo-Mechanical Fatigue (TMF): Extreme temperature changes and stress require robust support structures. Cummins addresses this through extensive TMF validation.
• Wastegate Complexity: Managing exhaust flow with bypass valves, especially in sequential systems, adds control complexity. Cummins mitigates this through duty cycle validation and material selection.

Cummins overcomes these challenges through advanced engineering, rigorous testing, and material expertise, successfully implementing two-stage turbocharging to improve engine performance, efficiency, and emissions compliance across diverse engine platforms.

Cummins Advances Engine Performance with Two-Stage Turbocharging appears first in TF Turbo。

Cummins Turbo Technologies, formerly UK-based Holset Engineering Co., Ltd. (founded in 1952, renamed in 2006), is a wholly-owned Cummins subsidiary. It designs and manufactures full-range original turbochargers and related products for diesel/natural gas engines (over 3L), applied in commercial vehicles, construction machinery, mining equipment, marine power, and generator sets.

With headquarters in Huddersfield, UK, it has production bases in the UK, Brazil, China, the Netherlands, India, and the US, plus R&D centers in the UK and Wuxi, China.

Wuxi Cummins Turbo Technologies Co., Ltd. (established in 1996) mainly produces Holset® series original turbochargers (covering medium/heavy/light-duty products) for road/ water/rail transportation and generator sets. It has Cummins’ only Chinese tech center and has produced over 20 million Holset turbochargers, winning titles like “Jiangsu Provincial High-Tech Enterprise”. It partners with major engine manufacturers, supporting emission-upgrades, and develops low-carbon/zero-carbon solutions for China.

Fuel Systems

Cummins Fuel Systems, a wholly-owned subsidiary with over 80 years of experience, has 5 global production bases (Indiana, US; Juárez, Mexico; Wuhan, China; Södertälje, Sweden; Pune, India). It makes electronic-controlled fuel systems for 6-78L diesel engines, balancing emission compliance with reliability, durability, power, and fuel economy.

Cummins Fuel Systems (Wuhan) Co., Ltd. (founded in 2007) offers full-set diesel common rail systems (fuel pumps, rails, injectors) to Chinese and global partners, while exploring zero-carbon components.

Product Line

• Common Rail Systems: Boost fuel economy for better engine performance.
• Injectors: 1600-2600 bar pressure, stable and reliable.
• Fuel Pumps: Up to 2600 bar (meets National VII standards), with oil/fuel lubrication options and 1-3 cylinders.

Software and Electronics

Cummins Software and Electronics develops cutting-edge software/electronics for commercial vehicles and industry, enhancing efficiency, performance, sustainability, and reliability.

Cummins China integrates teams from Beijing, Wuhan, and Wuxi to provide control modules, sensors, wire harnesses, and software-related services. It supports internal combustion engine business and expands into carbon-reduction fields. In 2023, it co-founded Kangzhuo Electronics with Zhuopin Intelligent Technology (Wuxi) to boost electronic control system R&D and production in China.

Valve Train

Cummins Valve Train (Jacobs Vehicle Systems), a wholly-owned subsidiary (headquartered in Bloomfield, US), has branches in China, France, Japan, South Korea, and India. Since 1961, it has made engine retarders for medium/heavy diesel/natural gas engines (over 10 million sold globally by 2024), offering valve train tech (cylinder deactivation, variable valve control, etc.) and services.

Jacobs (Suzhou) Vehicle Systems Co., Ltd. (established in 2008) provides commercial vehicle enterprises with professional products and end-users with cost-effective engine braking solutions, cutting TCO.

Cummins Engine Components & Software – Turbocharging Technology Systems appears first in TF Turbo。