A SYSTEM AND METHOD FOR CONTROLLING AN ENGINE

摘要

A method and system for dealing with a change of mind event during an automatic shut-down of an engine 6 having a dual mass flywheel 8 is provided that reduces or eliminates the risk of excessive dual mass resonance during a restart of the engine 6. Excessive resonance is reduced or eliminated by preventing the restarting of the engine 6 while its rotational speed falls within a predetermined speed range that encompasses the speed range where resonance is most likely to occur. A further advantageous aspect of the invention is that a throttle valve 10 is opened during the period when restarting is prevented so that the engine 6 is ready to be restarted in a favourable manner as soon as the speed falls below the predetermined speed range. In a preferred embodiment one or more ancillary loads 10 applied to the engine 6 are removed during the period when restarting is prevented thereby allowing the engine 6 to accelerate strongly through the predetermined speed range when it is restarted. To be published with Figure 1