Global power and technology leader, Cummins Inc., has announced a significant leap forward in sustainable transportation with the launch of its revolutionary turbocharger, specifically designed for hydrogen internal combustion engines (H2 ICE). This development marks a key milestone in the heavy-duty commercial on-highway sector in Europe, showcasing Cummins’ commitment to a zero-emission future.

Turbocharger for Hydrogen Engines (H2 ICE Turbocharger): A Game Changer for Heavy-Duty Transportation

The new H2 ICE turbocharger, developed by Cummins Components and Software (CCS), represents a major stride in the pursuit of low-emission transportation solutions. This turbocharger is not a mere adaptation of existing technology, but a bespoke design addressing the distinct requirements of hydrogen combustion. Specifically designed to power the first H2 ICE for heavy-duty trucks in Europe, it addresses the growing demand for more sustainable solutions.

Turbocharger for hydrogen engines innovation underscores Cummins’ strategic focus on decarbonization. The H2 ICE engine technology, recognized by the European Union (EU) as zero-emission, offers a practical, near-term alternative for reducing emissions. The compliance of H2 ICE engines with the stringent Euro VII emission standards underscores the viability of hydrogen as a key component in the global shift towards cleaner transportation.

Turbocharger for Hydrogen Engines, Technical Innovations:

The Cummins H2 ICE turbocharger is not simply an adaptation of existing turbocharging technology; it’s a meticulously engineered system designed from the ground up to address the unique challenges of hydrogen combustion. Turbocharger for Hydrogen Engines is based upon this variable geometry turbocharger (VGT) which is at the forefront of turbocharging innovation, incorporating several key features:

• Bespoke Aerodynamics for Enhanced Hydrogen Combustion Efficiency
  • Advanced Impeller and Turbine Blade Design: Cummins engineers have employed advanced computational fluid dynamics (CFD) simulations to optimize the impeller and turbine blade profiles for the unique characteristics of hydrogen. This includes adapting the blade angles, shapes, and curvature to achieve maximum aerodynamic efficiency with hydrogen’s lower density and higher flame speed. The design includes considerations for varying inlet conditions, ensuring optimal performance across the engine’s operating range.
  • Optimized Volute Design: The turbocharger volute (the spiral casing) is redesigned to ensure smooth airflow to the turbine, minimizing turbulence and pressure drop. This ensures efficient conversion of exhaust gas energy into turbine power. The volute is designed to handle the high volumetric flow rates of hydrogen combustion products.
  • Reduced Inertia Components: The turbocharger utilizes low-inertia rotor assemblies, which can quickly respond to changes in engine load, resulting in improved transient performance and reduced turbo lag. This is crucial for maintaining high engine responsiveness in the dynamic environments of heavy-duty trucking. The impeller and turbine are carefully balanced for high speed operation.
  • Improved Compressor Efficiency: The compressor design also employs variable geometry features to optimize performance at varying altitudes and ambient temperatures. The compressor maps are specifically developed for the unique conditions of hydrogen combustion. The compressor is also designed for higher flowrates compared to traditional turbochargers.
• Advanced Prognostics and Real-Time Performance Monitoring
  • Integrated Sensor Suite: The turbocharger incorporates a sophisticated array of high-precision sensors, including speed sensors, temperature sensors (both gas and component temperatures), pressure sensors (both boost pressure and back pressure), and vibration sensors. These sensors provide a detailed view of the turbocharger’s operating conditions in real-time.
  • Predictive Algorithms: Advanced machine learning algorithms analyze real-time data from the sensors, to predict performance degradation and identify the potential for failure before they occur. This includes algorithms for analyzing temperature variation, boost pressure patterns, vibration, and other parameters. These algorithms continuously update to learn the turbocharger’s performance over time and predict potential maintenance needs.
  • Diagnostic Software Integration: The diagnostic system seamlessly integrates with Cummins engine control system, providing real-time data and alerts to operators, enabling proactive maintenance to prevent potential downtimes. This predictive analytics enables scheduled maintenance based on real conditions rather than traditional time based maintenance schedules. The system monitors for out-of-bounds conditions and sends an alert to the operator.
  • Water Production Monitoring: Specific sensors designed to measure water accumulation within the turbocharger are included, which signals any issues related to increased water output and drainage.
• Variable Geometry Technology (VGT) for Dynamic Performance
  • Precision Actuation Mechanism: The VGT employs a highly precise actuation mechanism to control the position of the turbine vanes. This mechanism provides fine-grained control of the turbine’s flow path, enabling the turbocharger to deliver optimum performance across a wide range of engine operating conditions.
  • Advanced Control Strategy: The actuation system is controlled by advanced algorithms in the Engine Control Unit (ECU) which receives data from the engine, and the turbocharger sensors, and dynamically adjusts the position of the vanes for optimal performance.
  • Optimized Boost Control: The VGT allows for precise control of boost pressure, which in turn helps improve engine torque, responsiveness, and fuel efficiency. The VGT control system is dynamically adjusted based on the engine operating conditions.
  • Improved Low-End Torque: By utilizing variable geometry, the turbocharger can deliver higher boost at low engine speeds, enhancing low end torque and engine responsiveness.

These technical enhancements highlight Cummins’ dedication to innovation and their ability to deliver a turbocharger that not only meets the demands of hydrogen combustion but also optimizes the overall performance of heavy-duty hydrogen engines.

Overcoming the Challenges of Hydrogen Combustion

The development of the Turbocharger for hydrogen engines required significant innovation to overcome several technical challenges:

• Managing Variable Lambda Requirements:
  • Hydrogen combustion requires precise air-fuel ratios (lambda) which can vary significantly.
  • The turbocharger was engineered to function efficiently across this broader spectrum of lambda conditions, ensuring consistent engine performance.
  • The control system of the turbocharger has to quickly adapt to ensure that the required lambda is maintained during transient operations.
• Addressing Increased Water Production:
  • Hydrogen combustion creates a higher volume of water compared to conventional fuels.
  • The turbocharger’s design and materials had to be adapted to manage this increased water output without any performance degradation.
  • The material selection was critical to prevent water related corrosion.
• Mitigating Metallurgical Impacts of Hydrogen:
  • Hydrogen can cause embrittlement in certain metals.
  • Cummins selected specific materials and incorporated unique manufacturing processes to prevent structural issues related to hydrogen.

By overcoming these challenges, Cummins demonstrates its engineering expertise and leadership in developing hydrogen technologies for heavy-duty applications.

Turbo Hydrogen Engine, Compliance with Euro VII Emission Standards

Designing this new turbocharger for hydrogen engines, Cummins’ hydrogen internal combustion engine (H2 ICE) technology has been classified as zero-emission by the European Union (EU), making it a promising bridge solution for reducing emissions in heavy-duty applications. Furthermore, this technology complies with the upcoming Euro VII emission standards, showcasing hydrogen’s potential as a viable alternative fuel source in the journey toward global decarbonization.

Conclusion: Pioneering a Hydrogen-Powered Future

The launch of the H2 ICE turbocharger by Cummins signifies a major advancement in hydrogen technology for heavy-duty transportation. By addressing the inherent challenges of hydrogen combustion and delivering a reliable, high-performance turbocharging system, Cummins is charting a course toward a cleaner, more sustainable future. This innovation underscores the potential of hydrogen to power the next generation of heavy-duty vehicles and contributes significantly to global decarbonization efforts. As industries continue to explore hydrogen as a viable energy source, innovations like these will play a crucial role in shaping the landscape of clean transportation technologies.

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Alpine Alpenglow: Introduction to the Hy6

The Alpine Alpenglow Hy6 supercar marks a significant evolution in the world of hydrogen-powered vehicles. Building on the foundation set by its predecessor, the Hy4, (Alpine Alpenglow HY4) the Hy6 showcases Alpine’s commitment to sustainable performance while delivering exhilarating driving dynamics. This stunning concept car integrates advanced hydrogen technology with a powerful V6 engine, setting new standards for performance and efficiency in motorsport and beyond.

Hydrogen Technology and Hydrogen Engine H2ICE Design:

The two primary technologies for hydrogen-powered propulsion are hydrogen fuel cells vehicles (HFCV or FCEV), which generate electricity to drive an electric motor, and hydrogen internal combustion engines (H2ICE), which use hydrogen as a direct fuel source for power generation.

At the heart of the Hy6, super car is its innovative hydrogen internal combustion engine (H2 ICE). This engine represents a leap forward in hydrogen technology:

• Hydrogen Engine Specifications: The Hy6 is equipped with a 3.5-liter twin-turbocharged V6 engine that produces an impressive 740 hp (544 kW) at 7,600 rpm and 568 lb-ft (770 Nm) of torque at 5,000 rpm. This marks a substantial increase in power compared to the Hy4’s 340 hp output.
• Hydrogen Storage Tank: Compressed gaseous hydrogen (GH2): The vehicle features three hydrogen tanks, each capable of storing 2.1 kg of hydrogen at high pressures of 700 bar. These tanks are strategically positioned in ventilated compartments within the side pods and behind the cockpit, ensuring safety and optimal weight distribution.
• Hydrogen Combustion Process: The hydrogen engine utilizes direct injection technology for hydrogen, allowing for precise control over the air-fuel mixture. A water injection system further enhances combustion efficiency and reduces NOx emissions by moderating combustion temperatures.

Alpine Alpenglow Supercar: Design Innovations

The design of the Alpine Alpenglow Hy6 race car is not only visually striking but also functionally optimized for performance:

• Aerodynamic Features: The car’s design incorporates advanced aerodynamics with a sleek profile that minimizes drag. The transparent rear bonnet showcases the intricate engineering beneath while contributing to weight reduction.
• Chassis Construction: Built on an LMP3 carbon chassis, the Hy6 combines lightweight materials with structural integrity, ensuring high performance on both track and road.
• Visual Identity: The exterior features bold lines and distinctive color accents that reflect Alpine’s racing heritage, while also highlighting its commitment to sustainability through hydrogen technology.

Efficiency Improvements

The Alpine Alpenglow Hy6 hydrogen engine car demonstrates remarkable efficiency metrics that enhance its appeal as a performance vehicle:

• Performance on Track: The vehicle is designed to achieve approximately 100 km (62 miles) of running on track without refueling, showcasing hydrogen’s practicality as a fuel source for high-performance applications.
• Engine Efficiency: With advancements in combustion chamber design and air loop optimization, the Hy6 operates efficiently under heavy loads while minimizing emissions.

Alpine Alpenglow Hy4 and Hy6 differences

The Alpine Alpenglow Hy4 and Hy6 represent two significant milestones in Alpine’s exploration of hydrogen technology for high-performance vehicles. Here’s a detailed comparison of the main differences between the two models based on the latest research and information.

Alpine Alpenglow: Safety Features

Safety remains a top priority for Alpine in developing the Hy6 super car:

• Safety Engineering: The hydrogen tanks are housed in sealed compartments separate from the passenger area, equipped with rapid-release valves for quick evacuation in case of emergencies.
• Crash Safety Design: The updated crash structure has been engineered to absorb impact energy effectively, ensuring driver safety during high-speed racing scenarios.

Alpine Alpenglow Supercar: Overview

Here are some key specifications for the Alpine Alpenglow Hy6:

Alpine Alpenglow Hy6 Race Car – Hydrogen internal combustion engine (H2ICE) specifications:

Formula 1-inspired engine development has fine-tuned this Alpine Alpenglow Hy6 Race Car‘s hydrogen-powered engine for optimal performance. The combustion chamber, designed for dihydrogen (H₂), promotes turbulent mixing for a uniform air-fuel mixture before ignition. Hydrogen’s broad flammability range requires precise control to prevent issues like pre-ignition (spontaneous combustion before sparking) or knocking (shock waves from auto-ignition). Advanced fuel injection, combined with indirect water injection, reduces NOx emissions and minimizes abnormal combustion risks.

Availability and Pricing

The Alpine Alpenglow Hy6 supercar was showcased at the 2024 Paris Motor Show, highlighting its readiness for future motorsport applications. While specific pricing details have yet to be announced, it is anticipated that this advanced concept will pave the way for production models expected in late 2025 or early 2026, aligning with Alpine’s vision for sustainable performance vehicles.

Renault Group’s Commitment to Hydrogen Mobility: Driving Carbon Neutrality Goals

Renault Group embraces hydrogen technology with complementary solutions, advancing its mission for carbon neutrality in Europe by 2040 and globally by 2050. Hydrogen innovations play a pivotal role in achieving sustainable mobility and reducing emissions across its operations.

Conclusion

The supercar, Alpine Alpenglow Hy6 stands as a testament to innovation in hydrogen internal combustion engine (H2ICE) technology and automotive design. With its powerful engine, advanced safety features, and commitment to sustainability, this concept car sets a new benchmark for performance in motorsport. As Alpine continues to develop this exciting technology, it promises to redefine what is possible in the realm of high-performance vehicles powered by hydrogen.

Source: https://www.alpine-cars.co.uk/concept-cars/alpenglow.html

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TCPL Green Energy Systems, a wholly owned subsidiary of Tata Cummins Private Limited (TCPL), which is a joint venture between Tata Motors Limited and Cummins Inc. USA, has recently (March 2024), inaugurated a new factory in Jamshedpur, Jharkhand. This state-of-the-art facility, spreads across seven acres is dedicated to producing hydrogen based internal combustion engines (H2ICEs) for medium and heavy commercial vehicles:
– To develop low and zero-emission hydrogen engines for commercial vehicles, this large-scale factory in India dedicated to producing thousands of hydrogen internal combustion engines (H2ICE) annually.
-The collaboration reflects Tata Motors’ commitment to net-zero emissions and differentiated powertrain solutions.

Thus TCPL GES plans to invest over ₹350 Crores in the coming years to develop fuel-agnostic powertrain solutions. These solutions will include the above mentioned Hydrogen Internal Combustion Engines, Battery Electric Vehicle Systems, Fuel Cell Electric Vehicle Systems, and Fuel Delivery Systems.

The plant is expected to commence production in 2024 in a phased manner. As per current plans, the Hydrogen Internal Combustion Engine will roll out first followed by the Battery Electric Components (With Cummins’ advanced Battery Management System (BMS)) and Fuel Delivery System related products.

Providing hydrogen storage capabilities will enable us to accelerate the viability and adoption of hydrogen powered technologies in commercial markets.  The plant will manufacture composite tank systems and tailor-make solutions for hydrogen storage applications.

In Oct 2023, Tata Motors unveiled state-of-the-art facilities for development of Hydrogen propulsion technologies at its R&D center in Pune:

These facilities are yet another step forward from the company towards carbon neutrality, while tapping the strong potential of Hydrogen as a clean energy source has the following test cells:

Hydrogen Internal Combustion Engine (H2ICE) Development: The company aims to indigenously develop these H2ICEs, contributing to India’s mission of cleaner mobility.
– The technology holds great promise, especially for commercial vehicles, and Tata Motors believes hydrogen is the fuel of the future.
– Mr. Girish Wagh, Executive Director of Tata Motors, expressed optimism about the new era of technological innovations and advancements in green mobility.

Hydrogen Fuel Infrastructure:
– In addition to the engine test cell facility, Tata Motors has also facilitates the necessary infrastructure for storage and dispensing of hydrogen fuel.
– This infrastructure supports both Fuel Cell and H2ICE vehicles.
– By investing in hydrogen infrastructure, Tata Motors is taking a step toward carbon neutrality and harnessing the potential of hydrogen as a clean energy source.

Previous Showcases and Deliveries:
At Auto Expo 2023, Tata Motors showcased a wide range of commercial vehicle concepts, including the flagship Prima tractor.
The Prima tractor was presented in two avatars: one with a Hydrogen Internal Combustion Engine and the other with Fuel Cell Technology.
Additionally, Tata Motors delivered two technologically advanced, safer, new-generation Hydrogen Fuel Cell-powered buses to Indian Oil Corporation in September 2023.

In summary, Tata Motors is at the forefront of hydrogen technology, aiming to revolutionize transportation and contribute to a greener future.

Source: Press-Release-231023-1.pdf (tatamotors.com) & Cummins Press release

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Take a note that this is not an exhaust emissions control as liquid hydrogen powered GR Corolla H2 has no CO2 emissions

Since the H2 Corolla entered car racing in 2021, hydrogen engines (internal combustion engine ICE) have gained growing recognition as carbon-neutral technology.
For the end of 2023 Super Taikyu Racing Series, the team was experimenting with a new technology for capturing CO2 as the car drives every mile.

With Toyota investing heavily in hydrogen power, The liquid hydrogen powered GR Corolla H2 concept, which is an internal combustion engine (ICE) based with automating hydrogen filling and filling time to approximately 1 minute. Liquid hydrogen must be kept at temperatures lower than -253℃ during filling and storage.

The secret lies in two filters and a fluid fitted under the hood.
These filters consist of a ceramic catalyst, commonly used in the exhaust pipes of mass-produced vehicles, coated with a CO2 absorbent developed by Kawasaki Heavy Industries.

The first filter is mounted at the inlet to the air cleaner, capturing CO2 from the 60 liters of outside air that is sucked in every second.

The other filter sits at the very front of the engine bay, along the path taken by the engine oil as it circulates and lubricates the engine—that is, a spot experiencing high temperatures. One property of Kawasaki’s absorbent is that it releases CO2 when exposed to temperatures above 60°C, which means that heat from the engine oil causes the CO2 to separate.

The CO2 thus released is passed through the recovery fluid, bubbling away as it dissolves.

GR Vehicle Development Division Project General Manager Naoaki Ito, who oversees the hydrogen engine project, explains the significance of tackling this technology.

“Typically, facilities for capturing CO2 from the atmosphere use fans to suck in air and heat to detach the CO2, all of which requires energy. The key point about the H2 Corolla’s system is that it uses the existing air intake and heat within the engine.”

That is what makes this technology revolutionary—the fact that it requires no new energy to capture CO2 and can be incorporated into any vehicle with an engine.

Of course, there is still plenty of room for improvement. The amount of CO2 captured remains limited, totaling just 20 grams over 20 laps of Fuji Speedway (4.563 km per lap). And the filters must be replaced by hand at every pitstop.

Moving forward, the team will seek to increase capture volumes and automate filter replacement, working toward a more effective system that requires less human intervention.

Source & Image Credit: Toyota newsroom