Triple Injection Channels
Three independent, dedicated injection subsystems, each optimised for its specific fuel or oxidiser, managed by a unified engine control module.
Gasoline Injection
The primary energy backbone of the engine. Conventional fuel delivery maintains power density, cold-start reliability, and broad operating range. Always active — provides baseline combustion stability.
Hydrogen Injection
Dedicated sequential H₂ injection — port or direct. Expands the lean combustion limit, improves flame speed uniformity, and enables the dynamic cleaning protocol when operated at elevated ratios.
Air / Oxygen Management
Primarily ambient air managed via throttle body and boost pressure. Pure O₂ supplementation reserved for controlled laboratory validation. In-vehicle operation uses conventional induction for safety.
Design principle: The three channels are kept fully independent at the hardware level, enabling individual calibration, failure isolation, and mode-specific blending ratios without cross-contamination of fuel paths.
Adaptive Control Loop
A closed-loop engine control module continuously balances all three injection channels in real time, using four primary sensor inputs to compute four independent actuator outputs.
Three Distinct Engine Modes
The ECM selects among three operating strategies based on driver demand, sensor state, and active research or maintenance requirements.
Efficiency & Emissions
Hydrogen contribution kept at a conservative 3–5 % energy share. Prioritises fuel economy, emissions compliance, and long-term durability. Used during all normal daily driving cycles.
High-Ratio Exploration
H₂ ratio raised to 15–20 % under strict real-time supervision. Access gated by absence of knock events, thermal margin, and operator authorisation. For dyno or track-based testing only.
Dynamic Deposit Removal
Short cyclic regeneration protocol with elevated H₂ and a dedicated combustion map. Homogenises the flame front and applies controlled thermal impulses to degrade carbonaceous deposits.
Regenerative Cycle Sequence
A structured three-phase cleaning sequence that leverages the unique combustion properties of hydrogen to reduce and weaken engine deposits without exceeding material safety limits.
✅ Entry Conditions
Engine Warm
Coolant and oil temperature within normal operating range — no cold-start state.
No Active Faults
Zero knock events detected, EGT below threshold, no sensor DTCs present.
Stable RPM
Engine speed held steady between 2,000 – 3,000 RPM with constant load.
Safety Margins
All thermal and mechanical parameters have confirmed headroom before limits.
🔁 Regeneration Sequence
Phase A
H₂ raised to 10–15 % of total energy. Lambda target set slightly lean. Objective: extend the active flame front into cold zones and establish a uniform combustion envelope.
Phase B
Engine load gently elevated. EGT and knock continuously monitored in real time. Controlled thermal stress applied across several dozen combustion cycles to weaken deposit bonds.
Phase C
H₂ blending reduced back to normal 3–5 % baseline. Full sensor sweep to verify no drift, no residual faults. System declared clean — ECM reverts to standard map.
🎯 Target Effects
Deposit Inhibition
- ✔ Reduction of newly forming carbonaceous deposits on intake valves and piston crowns
- ✔ Leaner mixture limits unburnt hydrocarbon accumulation
- ✔ Higher flame uniformity minimises cold-zone soot nucleation
Deposit Weakening
- ✔ Partial thermal oxidation of organic deposit layers already present
- ✔ Structural bond weakening of polymerised carbon — without exceeding material limits
- ✔ Fragmented deposit particles expelled via exhaust flow
Material Safety
- ✔ EGT hard limit never breached — real-time guardian active throughout
- ✔ Knock sensor provides instant feedback — timing pulled immediately if needed
- ✔ Protocol aborts automatically on any out-of-bounds event
Real-Time Parameter Overview
Key operating parameters at a glance — representative nominal values during a standard operating cycle with light H₂ blending active.
Validation Status and Research Boundaries
This concept combines mature combustion-control principles with exploratory hydrogen blending and deposit-management hypotheses. Evidence is therefore heterogeneous and should be interpreted in tiers rather than as a single claim.
High-confidence engineering base
- ✔ Closed-loop spark-ignition controls (lambda, knock, ignition timing) are established production practices.
- ✔ EGT-guarded map transitions and fault-triggered fallback logic are standard in advanced engine ECUs.
- ✔ Multi-channel fuel-path separation supports failure isolation and calibration traceability.
Medium-confidence R&D domain
- ✔ Low-ratio hydrogen blending in SI engines is documented, but robust field outcomes depend on platform design and calibration quality.
- ✔ Deposit mitigation from periodic thermal strategies is plausible, yet highly sensitive to duty cycle and fuel chemistry.
- ✔ Knock and pre-ignition margins tighten at higher hydrogen ratios, requiring strict supervisory limits.
Critical validation KPIs
- ✔ Efficiency and emissions: BSFC delta, NOx/HC/CO trends across standardized drive cycles.
- ✔ Durability: valve/crown deposit mass after accelerated aging and teardown inspections.
- ✔ Safety: knock event density, EGT excursions, and automatic abort reliability in cleaning mode.
Interpretation rule: treat the architecture as a staged engineering program. Baseline control concepts can be considered near-production-ready, while high-ratio H₂ and dynamic cleaning claims should remain pilot-gated until validated on durability, emissions, and safety metrics over long campaigns.
Standards and Literature Baseline
Selected standards and scientific references that frame combustion control, hydrogen blending, engine calibration, and emissions compliance.
Combustion and hydrogen SI research
- ✔ Heywood, J. B., Internal Combustion Engine Fundamentals, 2nd ed., McGraw-Hill.
- ✔ Verhelst, S. and Wallner, T., Hydrogen-fueled internal combustion engines, Progress in Energy and Combustion Science.
- ✔ Recent SAE technical papers on hydrogen blending and SI knock mitigation strategies.
Emissions and measurement frameworks
- ✔ ISO 8178 series for exhaust emission measurement and test-cycle methods.
- ✔ UNECE R83 / R49 and related regional procedures for SI emissions compliance.
- ✔ OBD/diagnostic practices for knock, lambda, and catalyst-monitoring strategies.
Control and safety engineering
- ✔ ISO 26262 principles for safety-related automotive control software and hardware.
- ✔ SAE J1939 ecosystem for powertrain communication and diagnostics integration.
- ✔ Functional safety best practices for mode switching and fault-triggered fallback maps.