| 摘要 |
A lubricating system for the final drive chain (13) of a machine such as a motorcycle (10) has a source (14) of lubricating oil under pressure, an electrically-operated valve (17) for releasing oil from the source (14) and a duct (18,19) leading from the valve (17) to the chain (13). A control unit (25) receives impulses generated dependent upon the speed of the vehicle (10) and the valve (17) is opened for a pre-set period when a predetermined number of impulses have been received. The predetermined number of impulses and the duration of valve opening may be selected to ensure proper lubrication of the chain (13). Valve opening may be inhibited if the speed of the vehicle (10) falls below a minimum value.
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