Abstract

A tensioner for a chain driven power transmission system of an internal combustion engine, having a ratchet as part of the tensioning system is disclosed. The tensioner contains at least one bracket that is pivotally mounted to the engine adjacent one strand of the chain. The bracket contains a chain guide element that maintains forceful slideable engagement with the chain. Between the chain guide element and the bracket are an elongated support member having a pre-loaded spring force and an elongated resilient pad. The resilient pad quickly compresses in response to spikes or surges in chain tension absorbing the force of the spike.