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Numerical investigation of the effect of two-step injection (direct and port injection) of hydrogen blending and natural gas on engine performance and exhaust gas emissions - ScienceDirect

Processes, Free Full-Text

Effects of lubricant-fuel mixing on particle emissions in a single cylinder direct injection spark ignition engine

Gasoline direct injection - Wikipedia

JMSE, Free Full-Text

Combustion and Exhaust Emission Characteristics of Diesel Micro-Pilot Ignited Dual-Fuel Engine

Energies, Free Full-Text

Investigation on steam direct injection in a natural gas engine for fuel savings - ScienceDirect

Overview, Advancements and Challenges in Gasoline Direct Injection Engine Technology

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