Patent ID: 7043896
Filing Date: 2006-05-16
Classification: F01D,F02C,F05D,G05B

Abstract:
1. An engine shutdown device for controlling a fuel shut-off valve to thereby selectively interrupt fuel flow to an engine, said device comprising: a normal switch connected to said fuel shut-off valve and configured to respond to at least one of a normal shutdown signal and an emergency shutdown signal; an emergency switch connected to said fuel shut-off valve and configured to respond to said emergency shutdown signal having transient characteristics; wherein, upon receipt of said emergency shutdown signal, said emergency switch sends an emergency interruption signal to said valve and said normal switch sends a normal interruption signal to said valve to thereby interrupt said fuel flow; and said normal interruption signal having a given normal value, and said emergency interruption signal having a peak value substantially larger than said given normal value, whereby said fuel flow interrupting occurs faster in response to said emergency shutdown signal than in response to said normal shutdown signal.