Low-temperature combustion (LTC) has advantages in reducing emissions and improving efficiency, at the expense of hard controllability. To improve its controllability, this paper proposes a two-stage stratified compression ignition (TSCI) strategy, which aims to decouple ignition and the following combustion as two-stage sequential high-temperature reactions, and couple them to external events like multiple injections, supercharge, etc. A trace amount of high reactivity fuel (HRF) is injected near the top dead center (TDC) and auto-ignited, initiating the combustion process, which controls ignition. The highly premixed charge (HPC), whose equivalent ratio, temperature, reactivity can be tuned as needed, control the combustion course after ignition. Based on the TSCI concept, one demonstrative multiple-injection strategy is suggested and tested on a single-cylinder ethanol/diesel dual-fuel engine. It is concluded from the experimental results that the TSCI combustion process presents two-stage sequential high-temperature reactions, which is different from any other LTC strategies. This sequential combustion shows good controllability. Within a certain range, the ignition phase is directly and linearly related to the ignition-oriented injection (IOI) event. With the advance of IOI timing, the ignition is advanced consequently. Increasing IOI quantity has the same tendency. As for HPC, when HPC reactivity is increased, the maximum pressure raising rate (MPRR) is increased and the whole combustion process is more concentrated.

低温燃烧（LTC）在降低排放和提高效率方面具有优势，但难于控制。为了提高其可控性，本文提出了一种两阶段分层压缩点火（TSCI）策略，该策略旨在将点火和随后的燃烧作为两阶段的顺序高温反应去耦，并将其与外部事件（如多次喷射，增压）耦合等等。在上止点（TDC）附近注入痕量的高反应性燃料（HRF）并自动点火，从而启动燃烧过程，从而控制着火。可以根据需要调节当量比，温度，反应性的高度预混合装料（HPC），控制着火后的燃烧过程。基于TSCI的概念，提出了一种示范性多次喷射策略，并在单缸乙醇/柴油双燃料发动机上进行了测试。从实验结果可以得出结论，TSCI燃烧过程呈现两个阶段的顺序高温反应，这与任何其他LTC策略都不同。这种顺序燃烧显示出良好的可控性。在一定范围内，点火阶段与点火定向喷射（IOI）事件直接且线性相关。随着IOI正时的提前，点火也随之提前。IOI数量增加具有相同的趋势。对于HPC，当HPC反应性增加时，最大升压速率（MPRR）增加，整个燃烧过程更加集中。从实验结果可以得出结论，TSCI燃烧过程呈现两个阶段的顺序高温反应，这与任何其他LTC策略都不同。这种顺序燃烧显示出良好的可控性。在一定范围内，点火阶段与点火定向喷射（IOI）事件直接且线性相关。随着IOI正时的提前，点火也随之提前。IOI数量增加具有相同的趋势。对于HPC，当HPC反应性增加时，最大升压速率（MPRR）增加，整个燃烧过程更加集中。从实验结果可以得出结论，TSCI燃烧过程呈现两个阶段的顺序高温反应，这与任何其他LTC策略都不同。这种顺序燃烧显示出良好的可控性。在一定范围内，点火阶段与点火定向喷射（IOI）事件直接且线性相关。随着IOI正时的提前，点火也随之提前。IOI数量增加具有相同的趋势。对于HPC，当HPC反应性增加时，最大升压速率（MPRR）增加，整个燃烧过程更加集中。点火阶段与点火定向喷射（IOI）事件直接且线性相关。随着IOI正时的提前，点火也随之提前。IOI数量增加具有相同的趋势。对于HPC，当HPC反应性增加时，最大升压速率（MPRR）增加，整个燃烧过程更加集中。点火阶段与点火定向喷射（IOI）事件直接且线性相关。随着IOI正时的提前，点火也随之提前。IOI数量增加具有相同的趋势。对于HPC，当HPC反应性增加时，最大升压速率（MPRR）增加，整个燃烧过程更加集中。