A relief device including: an oil pump; an upstream flow passage provided from a discharge section side of the oil pump to an engine; an oil-pressure relief valve relieving oil by a valve body moving due to oil pressure; and a temperature-sensitive relief valve B relieving oil by detecting an oil temperature and opening and closing steplessly. A parameter collection module is distributed to a plurality of client processing systems. Alternatively, the access control device can comprise information to establish a secure connection to an authorization computing device and the access control device can implement the decisions of the authorization computing device.