Runaway engine shutdown using compression inhibiting mechanism

An article comprising:

• a computer readable data storage medium including an engine shutdown algorithm;
• and
• the engine shutdown algorithm being operable to signal at least one compression inhibiting mechanism to inhibit compression ignition within at least one combustion chamber when the engine is in a runaway condition.

A method of shutting down an engine, comprising the steps of:

• determining whether the engine is operating in a runaway condition;
• and
• moving a compression inhibiting mechanism, when the engine is operating in the runaway condition, from a first position in which compression ignition can occur within at least one combustion chamber to a second position in which compression ignition cannot occur within the at least one combustion chamber.