Automated oil-change system and method

• US 7,686,136 B2
• Filed: 11/08/2004
• Issued: 03/30/2010
• Est. Priority Date: 11/08/2004
• Status: Expired due to Fees

• Current Assignee: Larry Douglas Evans
• Original Assignee: Larry Douglas Evans
• Inventors: Evans, Larry Douglas
• Primary Examiner(s): Siconolfi; Robert A
• Assistant Examiner(s): Irvin; Thomas W
• Application Number:
  US10/904,390
• Publication Number:
  US 20060096809A1
• Time in Patent Office: 1,968 Days
• Field of Search: 184/6.5, 184/15.3, 184/1.5, 123/196.R, 123/198.C, 440/88.R
• US Class Current: 184/1.5
• CPC Class Codes: F01M 11/04 Filling or draining lubricant of or from machines or engines

Abstract

The present invention may provide an automatic oil-change system for an engine comprising: a first oil container, a second oil container and means for switching between the first oil container and the second oil container. The switching means may provide the engine with oil from the first oil container until a predetermined time and once a predetermined time is reached, the switching means may provide the engine with oil from the second oil container.

Claims

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 three-way oil pump valve that connects the first oil container and the second oil container to an oil pump, the three-way oil pump valve controlling oil flow from the first oil container and the second oil container to the oil pump;

a three-way return valve that connects a bottom fitting in an oil pan to the first oil container and the second oil container, the three-way return valve controlling oil flow from the oil pan to the first oil container and the second oil container; and

a three-way vacuum valve that connects the first oil container and the second oil container to a vacuum system of the engine, the three-way vacuum valve controlling air flow from the first oil container and the second oil container to the vacuum system of the engine; and

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.

2. The automatic oil-change system of claim 1, wherein when the valves are in the first configuration, the three-way oil pump valve is set to allow the flow of oil from the first oil container to the oil pump and to prevent the flow of oil from the second oil container to the oil pump, the three-way return valve is set to allow the flow of oil from the oil pan to the first oil container and to prevent the flow of oil from the oil pan to the second oil container, and the three-way vacuum valve is set to allow the flow of air from the first oil container to the vacuum system of the engine and to prevent the flow of air from the second oil container to the vacuum system of the engine;

and

wherein when the valves are in the second configuration, the three-way oil pump valve is reset to allow the flow of oil from the second oil container to the oil pump and to prevent the flow of oil from the first oil container to the oil pump, the three-way return valve is reset to allow the flow of oil from the oil pan to the second oil container and to prevent the flow of oil from the oil pan to the first oil container, and the three-way vacuum valve is reset to allow the flow of air from the second oil container to the vacuum system of the engine and prevent the flow of air from the first oil container to the vacuum system of the engine.

3. The automatic oil-change system of claim 1, wherein the controller is operable to reset the three-way oil pump valve, the three-way return valve, and the three-way vacuum valve in a staggered manner so to reduce the mixing of oil from first oil container with oil from the second oil container as the valves are switched from the first configuration to the second configuration.

4. The automatic oil-change system of claim 2, wherein the controller is further operable to switch the valves from the first configuration to the second configuration by switching the valves from the first configuration to an interim configuration, temporarily maintaining the valves in the interim configuration, and switching the valves from the interim configuration to the second configuration;

wherein when the valves are in the interim configuration, the three-way oil pump valve allows the flow of oil from the second oil container to the oil pump and prevents the flow of oil from the first oil container to the oil pump, the three-way return valve allows the flow of oil from the oil pan to the first oil container and prevents the flow of oil from the oil pan to the second oil container, and the three-way vacuum valve allows the flow of air from the first oil container to the vacuum system of the engine and prevents the flow of air from the second oil container to the vacuum system of the engine.

5. The automatic oil-change system of claim 1, wherein the controller is further operable to permit an operator to switch the valves from the first configuration to the second configuration.

6. The automatic oil-change system of claim 1, wherein the engine powers an automobile and the controller is operable to switch the valves from the first configuration to the second configuration while the automobile is running.

7. A method for automatically changing oil in an engine of a vehicle, the engine including multiple valves, the method comprising:

monitoring usage data, the usage data being an accumulated distance that the vehicle has traveled with the engine using oil from the first oil container, as measured over multiple initializations of the engine; and

controlling a flow of oil in the engine, based at least in part on the accumulated usage data, the engine using the oil from the first oil container until the accumulated usage data reaches a predetermined limit and the engine using oil from a second oil container after the predetermined limit is reached;

wherein the multiple valves include a three-way oil pump valve that connects the first oil container and the second oil container to an oil pump, a three-way return valve that connects a bottom fitting in an oil pan to the first oil container and the second oil container, a three-way vacuum valve that connects the first oil container and the second oil container to a vacuum system of the engine, and a vacuum regulator located between the three-way vacuum valve and the vacuum system of the engine; and

wherein controlling a flow of oil in the engine comprises;

controlling oil flow from the first oil container and the second oil container to the oil pump with the three-way oil pump valve, and from the oil pan to the first oil container and the second oil container with the three-way return valve,

controlling air flow from the first oil container and the second oil container to the vacuum system of the engine with the three-way vacuum valve,

regulating the vacuum within the first oil container and the second oil container with the vacuum regulator to ensure that a maximum limit is not exceeded; and

resetting the multiple valves to cause the engine to use oil from the second oil container after the predetermined limit is reached.

8. The method of claim 7, wherein controlling a flow of oil in the engine comprises:

setting the multiple valves in a first configuration until the usage data reaches the predetermined limit, wherein when the multiples valves are in the first configuration the three-way oil pump valve is set to allow the flow of oil from the first oil container to the oil pump and to prevent the flow of oil from the second oil container to the oil pump, the three-way return valve is set to allow the flow of oil from the oil pan to the first oil container and to prevent the flow of oil from the oil pan to the second oil container, and the three-way vacuum valve is set to allow the flow of air from the first oil container to the vacuum system of the engine and to prevent the flow of air from the second oil container to the vacuum system of the engine; and

setting the multiple valves in a second configuration after the usage data reaches the predetermined limit, wherein when the multiples valves are in the second configuration the three-oil pump valve is set to allow the flow of oil from the second oil container to the oil pump and to prevent the flow of oil from the first oil container to the oil pump, the three-way return valve is set to allow the flow of oil from the oil pan to the second oil container and to prevent the flow of oil from the oil pan to the first oil container, and the three-way vacuum valve is set to allow the flow of air from the second oil container to the vacuum system of the engine and to prevent the flow of air from the first oil container to the vacuum system of the engine.

9. The method of claim 7, further comprising setting the multiple valves in an interim configuration once the usage data reaches the predetermined limit so to reduce mixing of oil from first oil container and oil from the second oil container during the oil change.

10. The method of claim 8, wherein setting the multiple valves in a second configuration further comprises resetting the three-way oil pump valve to allow the flow of oil from the second oil container to the oil pump and to prevent the flow of oil from the first oil container to the oil pump before resetting of the three-way return valve to allow the flow of oil from the oil pan to the second oil container and to prevent the flow of oil from the oil pan to the first oil container and before resetting of the three-way vacuum valve to allow the flow of air from the second oil container to the vacuum system of the engine and to prevent the flow of air from the first oil container to the vacuum system of the engine.

11. The method of claim 7, wherein controlling a flow of oil in the engine based at least in part on the usage data further comprises controlling the flow of oil in the engine based at least in part on an input from an operator.

12. The method of claim 7, wherein the predetermined limit is reached while the vehicle is running.