Patent ID: 6181239
Filing Date: 2001-01-30
Classification: F01L,F02B

Abstract:
A timing belt drive system for an automotive engine having a crankshaft and a camshaft, said drive system comprising:a first timing belt coupling said camshaft to said crankshaft for rotation therewith at a given rotational velocity ratio;a second timing belt coupling said camshaft to said crankshaft for rotation therewith at said given rotational velocity ratio;a first sensor responsive to said first timing belt being out of its normal operating position;a second sensor responsive to said second timing belt being out of its normal operating position;said engine exhibiting a first mode of operation wherein both said first and second timing belts are in normal operating position, and a second mode of operation wherein one of said first and second timing belts is out of its normal operating position and only one of said first and second belts is in its normal operating position; andan alarm coupled to each of said first and second sensors for indicating when engine operation changes from said first mode of operation to said second mode of operation.