Market Context — Why This Technology, Why Now

The global push for net-zero emissions is accelerating demand for clean energy solutions across heavy industries. Stricter environmental regulations, coupled with volatile fossil fuel prices, are compelling sectors like maritime, power generation, and heavy transport to invest in hydrogen infrastructure and engine technologies. This patent offers a critical enabler for these transitions, providing the stability and efficiency needed to scale hydrogen engine deployment and meet ambitious decarbonization targets.

Key Competitive Advantages
01

Achieves high responsiveness to load fluctuations, ensuring stable engine operation during rapid load changes and improving navigation planning flexibility.

02

Reliably suppresses abnormal combustion, such as pre-ignition, by maintaining an optimal air-fuel ratio even during air shortage, enabling safe and highly efficient operation.

03

Maximizes fuel efficiency by stabilizing lean combustion, optimizing hydrogen fuel utilization, reducing operating costs, and improving environmental performance.

Market Opportunity
Maritime & Shipping Industry
$13.5B–$33.5B globally (AI est.)
IMO regulations are driving an urgent transition to decarbonized fuel vessels. Hydrogen-fueled ships are a key option, requiring stable engine control technology.
Global shipping lines Marine engine manufacturers Shipbuilders focusing on green vessels
Power Generation & Industrial Machinery
$1.5B–$3.5B (AI est.)
Stationary power generators for factories and plants, along with large construction machinery, require decarbonization. Hydrogen engine adoption is being explored for these applications.
Industrial power generation equipment suppliers Heavy machinery manufacturers Energy solution providers
Heavy-Duty Transport Vehicles
$1.5B–$3.5B (AI est.)
Hydrogen engines are anticipated for long-distance transport sectors like trucks and buses, where battery electric vehicles face limitations. This technology could significantly contribute to their adoption.
Commercial vehicle OEMs Bus and truck engine manufacturers Logistics fleet operators
IP Defensibility — Why Competitors Can't Replicate This
What This Patent Covers

This patent protects a combustion control method for hydrogen engines, specifically addressing turbocharger responsiveness during load changes to suppress abnormal combustion. It features 16 claims, defining a broad and detailed scope, and was granted after rigorous examination, ensuring high legal stability for practical application.

Competitive White Space

This patent focuses on combustion control algorithms for hydrogen engines. White space exists in optimizing hydrogen fuel injection hardware, developing advanced exhaust gas after-treatment systems for NOx reduction, or integrating hydrogen engines into hybrid powertrain architectures.

Economic Impact
~$650K/year estimated operational savings per large vessel (est.)
estimated ROI · USD · AI analysis
ROI Calculation Logic

Assuming annual fuel costs of ~$3.35M (AI est.) for a large vessel, this technology could reduce fuel costs by ~15%, saving ~$0.5M (AI est.) annually. Additionally, reduced engine wear and maintenance due to abnormal combustion suppression could save an estimated ~$0.15M–$0.35M (AI est.) in maintenance costs annually. Total economic impact could exceed ~$650K (AI est.) per vessel per year.

Speed to Market
5× faster than in-house development
This technology's combustion control logic, which accounts for turbocharger responsiveness, is already established and patented. This significantly reduces the time required for fundamental research and algorithm development. The expertise in abnormal combustion suppression is crucial for safety and reliability, allowing licensees to avoid substantial time and cost associated with developing this from scratch. By focusing on integration and validation with existing engine systems, market entry could be accelerated by approximately 4 years.
Competitive Positioning

X: Combustion Stability & Reliability
Y: Environmental Performance & Regulatory Compliance

Business Models & Applications
🤝 Technology Licensing
Licensing this technology allows companies to integrate it into their products, accelerating performance improvements and market entry for hydrogen combustion engines.
💡 Joint Development Partnership
By building on this technology, joint development of hydrogen combustion engines tailored for specific applications or markets can create new value and expand market reach.
⚙️ Control System Module Provision
Providing this technology as an implemented combustion control module can facilitate easy add-on to existing engine systems or integration into new developments.
Adjacent Application Opportunities
🏭 Power Plants
Stationary Hydrogen Power Systems
This technology could be adapted for large-scale stationary hydrogen power plants, enabling stable power supply even with load fluctuations. It has the potential to contribute to grid stabilization, especially when combined with renewable energy sources, improving efficiency by up to 15%.
🚜 Construction Machinery
Hydrogen-Powered Construction Equipment Control
Construction machinery like excavators and cranes frequently experience rapid load changes. Adapting this technology could suppress abnormal combustion in hydrogen-fueled construction equipment, ensuring stable and safe operation during high-load tasks, potentially reducing fuel consumption by 10-15%.
鉄道・航空
Hydrogen Fuel Transport Systems
Hydrogen combustion engines may be introduced in future railway vehicles and aircraft. This technology could serve as a foundational control system for high-efficiency, safe combustion in these transport applications, contributing to decarbonization efforts and potentially extending operational range by 5-10%.
Integration Roadmap — Estimated 18-Month Deployment
Phase 1: Technical Validation & Requirements Definition
Duration: 3 months
Defines requirements for adapting the control logic to existing engine systems and conducts basic performance validation through simulations.
Phase 2: Control System Development & Prototype Construction
Duration: 9 months
Implements software into the Engine Control Unit (ECU) based on defined requirements and conducts demonstration tests on a prototype engine.
Phase 3: Field Validation & Mass Production Preparation
Duration: 6 months
Conducts integration validation on actual vessels or industrial machinery, evaluates durability and reliability, and prepares for mass production and certification.
Technical Feasibility
This technology is a combustion control method for hydrogen engines that considers turbocharger responsiveness, primarily implemented through control algorithms. It is anticipated to be relatively easy to integrate via software updates to existing Engine Control Units (ECUs) or by adding a dedicated control module. The patent claims clearly describe the coordination between the turbocharger and combustion control, suggesting system integration can be achieved with minimal hardware changes, at relatively low cost, and within a short timeframe.
Success Scenario
Implementing this technology could significantly reduce the risk of abnormal combustion in hydrogen engines, even during rapid load fluctuations. This may enhance flexibility in vessel navigation planning and is estimated to improve fuel efficiency by up to 15%. Consequently, it could reduce operational costs while achieving compliance with zero CO2 emission environmental regulations. Licensees are expected to gain a competitive advantage in the market by leveraging this next-generation clean energy technology.
Patent Record
APPLICATION NO.
特願2021-058407
REGISTRATION NO.
7595349
FILING DATE
2021/03/30
GRANT DATE
2024/11/28
EXPIRATION DATE
2041/03/30
PATENT HOLDER
国立研究開発法人　海上・港湾・航空技術研究所
Examination History
2024年01月23日
出願審査請求書
2024年08月27日
拒絶理由通知書
2024年10月25日
意見書
2024年10月25日
手続補正書（自発・内容）
2024年11月12日
特許査定