Engine oil system

Patent metadata

Field	Value
Publication number	US-9334765-B2
Application number	US-201414316374-A
Country	US
Kind code	B2
Filing date	Jun 26, 2014
Priority date	Jun 27, 2013
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

An engine oil system according to the disclosure comprises an oil pump connected to an oil sump, an oil cooler connected to the oil pump and an oil filter. The oil filter is connected to an engine. The engine oil system further comprises a first by-pass conduit connected to the oil pump and which is arranged to be connected to a component of the engine oil system other than the oil cooler. The first by-pass conduit comprises a first by-pass valve, wherein, in a first mode, the first by-pass valve is in an open state allowing oil to by-pass the oil cooler, and wherein, in a second mode, the first by-pass valve is in a closed state directing the oil through the oil cooler. The disclosure also relates to a vehicle comprising an engine oil system.

First claim

What is claimed is:

1. An engine oil system comprising:
an engine;
an oil pump connected to an oil sump;
an oil filter connected to the engine;
an oil cooler connected to the oil pump and the oil filter;
a first by-pass conduit connected to the oil pump and the oil filter, the first by-pass conduit comprising a first by-pass valve, wherein, in a first mode, the first by-pass valve is configured to be in an open state for allowing oil to by-pass the oil cooler and pass through the oil filter before flowing to the engine, and wherein, in a second mode, the first by-pass valve is configured to be in a closed state for causing the oil to be directed through the oil cooler; and

a second by-pass conduit comprising a second by-pass valve, the second by-pass conduit being connected to the oil pump and to the engine, wherein the second by-pass valve in a third mode is configured to be in an open state for allowing oil to by-pass the oil cooler, and wherein the second by-pass valve in a fourth mode is configured to be in a closed state for causing the oil to be directed through the oil cooler;
wherein the first by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the second by-pass valve, and the second by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the first by-pass valve, and wherein at least one of the first and second by-pass valves is configured to be controlled by a thermostat or an electric actuator.

2. The engine oil system according to claim 1 wherein the state of the first by-pass valve is determinable based on one or more of:
temperature of the oil,
pressure in the engine oil system,
elapsed time after start of the engine,
torque output of the engine,
revolutions per minute of the engine,
ambient temperature,
temperature of cooling water,
effect requested by the engine.

3. The engine oil system according to claim 1 wherein the first by-pass valve is an on-off valve.

4. The engine oil system according to claim 3 wherein opening and closing times of the first by-pass valve are each between 0 and 600 seconds.

5. The engine oil system according to claim 4 wherein the opening and closing times of the first by-pass valve are each between 0 and 120 seconds.

6. The engine oil system according to claim 1 wherein the state of the second by-pass valve is determinable based on one or more of:
temperature of the oil,
pressure in the engine oil system,
elapsed time after start of the engine,
torque output of the engine,
revolutions per minute of the engine,
ambient temperature,
temperature of cooling water,
effect requested by the engine.

7. The engine oil system according to claim 1 wherein the second by-pass valve is an on-off valve.

8. The engine oil system according to claim 7 wherein opening and closing times of the second by-pass valve are each between 0 and 600 seconds.

9. The engine oil system according to claim 8 wherein the opening and closing times of the second by-pass valve are each between 0 and 120 seconds.

10. A vehicle comprising the engine oil system according to claim 1 .

11. An engine oil system comprising:
an oil pump connectable to an oil sump;
an oil filter connectable to an engine;
an oil cooler connectable to the oil pump and the oil filter;
a first by-pass conduit connectable to the oil pump and the oil filter, the first by-pass conduit comprising a first by-pass valve, wherein, in a first mode, the first by-pass valve is configured to be in an open state for allowing oil to by-pass the oil cooler and pass through the oil filter before flowing to the engine, and wherein, in a second mode, the first by-pass valve is configured to be in a closed state for causing the oil to be directed through the oil cooler; and

a second by-pass conduit comprising a second by-pass valve, the second by-pass conduit being connectable to the oil pump and to the engine, wherein the second by-pass valve in a third mode is configured to be in an open state for allowing oil to by-pass the oil cooler, and wherein the second by-pass valve in a fourth mode is configured to be in a closed state for causing the oil to be directed through the oil cooler;
wherein, when the second by-pass valve is in the closed state, the first by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the second by-pass valve, and, when the first by-pass valve is in the closed state, the second by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the first by-pass valve.

12. An engine oil system comprising:
an engine;
an oil pump connected to an oil sump;
an oil filter connected to the engine;
an oil cooler connected to the oil pump and the oil filter;
a first by-pass conduit connected to the oil pump and comprising a first by-pass valve, wherein, in a first mode, the first by-pass valve is configured to be in an open state for allowing oil to by-pass the oil cooler, and wherein, in a second mode, the first by-pass valve is configured to be in a closed state for causing the oil to be directed through the oil cooler; and
a second by-pass conduit connected to the oil pump and comprising a second by-pass valve, wherein, in a third mode, the second by-pass valve is configured to be in an open state for allowing the oil to by-pass the oil cooler, and wherein, in a fourth mode, the second by-pass valve is configured to be in a closed state for causing the oil to be directed through the oil cooler;
wherein, when the second by-pass valve is in the closed state, the first by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the second by-pass valve, and, when the first by-pass valve is in the closed state, the second by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the first by-pass valve.

13. The engine oil system according to claim 12 wherein the first by-pass conduit is connected to the oil filter on an upstream side of the oil filter such that the oil is allowed to pass through the oil filter when the first by-pass valve is in the open state.

14. The engine oil system according to claim 13 wherein the second by-pass conduit is connected to the engine such that the oil is allowed to by-pass the oil filter and flow to the engine when the second by-pass valve is in the open state.

15. The engine oil system according to claim 12 wherein the second by-pass conduit is connected to the engine such that the oil is allowed to by-pass the oil filter when the second by-pass valve is in the open state.

16. The engine oil system according to claim 1 wherein the first by-pass conduit and the second by-pass conduit are each connected to the oil pump upstream of the oil cooler.

17. The engine oil system according to claim 11 wherein the first by-pass conduit and the second by-pass conduit are each connectable to the oil pump upstream of the oil cooler, and wherein the first by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the second by-pass valve, and the second by-pass conduit is configured to allow the oil to by-pass the oil cooler without passing through the first by-pass valve.

18. The engine oil system of claim 1 wherein the at least one of the first and second by-pass valves is configured to be controlled by a stepper motor.

19. The engine oil system of claim 12 wherein at least one of the first and se

Assignees

• Volvo Car Corp

Inventors

• Boden Roger
• Jonason Ulf

Classifications

• F16N39/005

  by evaporating or purifying (for heating or cooling of filters B01D35/18, e.g. comprising a vaporising unit B01D35/185) · CPC title

• F01M11/0458

  Lubricant filling and draining · CPC title

• F01M11/02

  Arrangements of lubricant conduits · CPC title

• F01M5/02

  Conditioning lubricant for aiding engine starting, e.g. heating · CPC title

• F01M11/03

  Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means (filters B01D) · CPC title