Method and apparatus for reducing blow-by coking
View Patent ↗A method of coking entrained oil from blow-by gas (F) of an engine ( 14 ) in a closed breather assembly ( 16 ) includes the steps of transporting the blow-by gas from the engine to a mist separator ( 18 ), transporting the blow-by gas from the mist separator to a breather coking device ( 12 ), heating the breather coking device at least one of conductively and convectively with an exhaust manifold ( 32 ) of the engine, coking out at least a portion of entrained oil from the blow-by gas and depositing the coked oil at the breather coking device, and transporting the blow-by gas from the breather coking device to one of a turbocharger compressor ( 24 ) and the engine.
1. A blow-by treatment assembly for a vehicle having an engine emitting blow-by gas, the blow-by treatment assembly comprising:
an exhaust manifold of the engine for receiving exhaust gas;
an oil mist separator in downstream fluid communication with the engine for receiving blow-by gas;
a breather coking device disposed in downstream fluid communication with the oil mist separator to receive blow-by gas, wherein at least a portion of the breather coking device receives heat transferred from the exhaust manifold to reach a coking temperature where entrained oil is coked out of the blow-by gas and deposited on the breather coking device;
a coking outlet of the breather coking device in upstream fluid communication with at least one of a turbocharger compressor and the engine;
an exhaust tube in fluid communication with the engine for receiving exhaust gases; and
a second portion of the breather coking device receives heat transferred from the exhaust tube to reach a coking temperature where entrained oil is coked out of the blow-by gas and deposited in the breather coking device.
2. The blow-by treatment assembly of claim 1 wherein the breather coking device contacts the exhaust manifold to receive heat conductively transferred from the exhaust manifold.
3. The blow-by treatment assembly of claim 1 wherein the breather coking device is within about 6-inches of the exhaust manifold to receive heat convectively transferred from the exhaust manifold.
4. The blow-by treatment assembly of claim 1 wherein the coking temperature of the breather coking device is at least 300-degrees Fahrenheit.
5. The blow-by treatment assembly of claim 1 wherein the breather coking device comprises a tubular body.
6. The blow-by treatment assembly of claim 1 further comprising a coking inlet attached to a breather assembly, and a coking outlet attached to the turbocharger compressor.
7. The blow-by treatment assembly of claim 1 wherein the at least a portion of the breather coking device is oriented generally parallel to the exhaust manifold.
8. The blow-by treatment assembly of claim 1 wherein the breather coking device is mounted to the engine with mounts.
9. A blow-by treatment assembly for a vehicle having an engine emitting blow-by gas, the blow-by treatment assembly comprising:
an exhaust manifold of the engine for receiving exhaust gas;
an oil mist separator in downstream fluid communication with the engine for receiving blow-by gas;
a breather coking device having a tubular body attached to and in downstream fluid communication with the oil mist separator to receive blow-by gas, wherein at least a portion of the tubular body receives heat transferred from the exhaust manifold to reach a coking temperature where entrained oil is coked out of the blow-by gas and deposited on the breather coking device;
a coking outlet of the tubular body attached to and in upstream fluid communication with a turbocharger compressor;
an exhaust tube in fluid communication with the engine for receiving exhaust gases; and
a second portion of the breather coking device receives heat transferred from the exhaust tube to reach a coking temperature where entrained oil is coked out of the blow-by gas and deposited in the breather coking device.
10. The blow-by treatment assembly of claim 9 wherein the breather coking device contacts the exhaust manifold to receive heat conductively transferred from the exhaust manifold.
11. The blow-by treatment assembly of claim 9 wherein the breather coking device is within 6-inches of the exhaust manifold to receive heat convectively transferred from the exhaust manifold.
12. The blow-by treatment assembly of claim 9 wherein the coking temperature of the breather coking device is at least 300 degrees Fahrenheit.
13. The blow-by treatment assembly of claim 9 wherein the at least a portion of the breather coking device is oriented generally parallel to the exhaust manifold.