Active Thermo-Atmosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines

TLDR

Active Thermo‑Atmosphere Combustion (ATAC) is a novel combustion system that differs from conventional gasoline and diesel engine processes. ATAC is a new lean combustion process that enables stable part‑throttle operation in two‑stroke gasoline engines, reducing fuel consumption, exhaust emissions, noise, and vibration.

Abstract

A new lean combustion process for internal combustion engines has been developed. This newly devised combustion system, designated as Active Thermo-Atmosphere Combustion (ATAC), differs from conventional gasoline and diesel engine combustion processes. ATAC can be applied most easily to two-stroke cycle gasoline engines. Stable combustion can be achieved with lean mixtures at part-throttle operation. With ATAC the fuel consumption and exhaust emissions of two-stroke cycle spark-ignition engines are remarkably improved, and noise and vibration are reduced.