What does SI stand for?

Spark Ignition

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

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Samples in periodicals archive:

THE GREAT DTSi DEBATE DTSi means Digital Twin Spark Ignition -- a technology that uses two spark plugs per engine cylinder, which is different from the previous technology which used one spark plug for each engine cylinder.

TVS gets SC relief on twin-spark row

of Lodz, Poland) and Veyssiere (mechanics and physics, CNRS, France) have collected contributions from fellow scientists and engineers on the topics of combustion chemistry, flammability limits, spark ignition, counterflow twin-flame configurations and flame in a vortex core.

Combustion phenomena; selected mechanisms of flame formation, ...

However, with the emissions requirements becoming more stringent, together with gasoline technology improving, 1 do see spark ignition engines making a comeback in terms of market share.

Hybrids, diesel, gas?

At higher speeds, or under heavy loads, the engine switches to spark ignition mode.

GM Develops New High-Efficiency Engine

Other features are said to include calorized steel emitter tubes for higher radiant efficiency and safety, a state-of-the-art step opening combustion gas valve for quieter ignition, and a closed combustion chamber design and direct spark ignition system with 100% safety shut-off control.

Low-intensity infrared heaters suited for high air change areas

Does it have spark ignition, a hot surface igniter or an old-school continuous pilot light?

Got gas? How to power furnace in a blackout Q&A ; Gas furnace, ...

Suitable for small spark ignition engines that power mobile equipment, the controller can be calibrated on any PC using the company's ACT software.

Programmable control system. (Innovations)

Unlike spark ignition engines or Diesel engines, there is no direct mechanism to precisely initiate SOC in an HCCI engine.

TIAX to Develop Engine Sensor Technology for U.S. Department of ...