Patent ID: 7686136
Filing Date: 2010-03-30
Classification: F01M

Abstract:
1. An automatic oil-change system for an engine comprising: a first oil container; a second oil container; one or more valves associated with the first oil container and the second oil container, the one or more valves comprising: a vacuum regulator located between the three-way vacuum valve and the vacuum system of the engine, wherein the vacuum regulator regulates the vacuum within the first oil container and the second oil container to ensure that a maximum limit is not exceeded; wherein the engine is provided with oil from the first oil container when the valves are in a first configuration; and wherein the engine is provided with oil from the second oil container when the valves are in a second configuration; and a controller operable to switch the valves from the first configuration to the second configuration in response to the valves remaining in the first configuration for a predefined distance, as measured over multiple initializations of the engine.