System and method for reducing friction in engines
First Claim
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1. A vehicle system, comprising:
- an internal combustion engine including a crankcase;
a first conduit coupling the crankcase with a fresh air intake upstream of a compressor and an intake throttle;
a second conduit coupling a fuel tank containing compressed natural gas with the first conduit and having a flow control valve arranged therein;
a third conduit coupling the crankcase with the intake downstream of the throttle; and
a controller having executable instructions to control the flow control valve to deliver compressed natural gas from the fuel tank to the first conduit via the second conduit and then into the crankcase.
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Abstract
A vehicle system comprises an internal combustion engine including a PCV system fluidly coupled to a gaseous fuel source via a flow control valve. The gaseous fuel source may be fluidly coupled to an air inflow line of the PCV system, and the flow control valve may be configured to control a flow of gaseous fuel into the PCV system.
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Citations
19 Claims
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1. A vehicle system, comprising:
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an internal combustion engine including a crankcase; a first conduit coupling the crankcase with a fresh air intake upstream of a compressor and an intake throttle; a second conduit coupling a fuel tank containing compressed natural gas with the first conduit and having a flow control valve arranged therein; a third conduit coupling the crankcase with the intake downstream of the throttle; and a controller having executable instructions to control the flow control valve to deliver compressed natural gas from the fuel tank to the first conduit via the second conduit and then into the crankcase. - View Dependent Claims (2, 3, 4, 5)
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6. A method, comprising:
delivering compressed natural gas to a first conduit of a PCV system of an engine via a second conduit, and then from the first conduit into an engine crankcase, the second conduit coupling a fuel tank containing the compressed natural gas with the first conduit, the first conduit coupling the crankcase with a fresh air intake upstream of a throttle, in response to a blow-by gas flow rate being less than a flow rate of a PCV valve arranged in a third conduit, the third conduit coupling the crankcase with the intake downstream of the throttle. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A vehicle, comprising:
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an internal combustion engine including a crankcase and a PCV system; a first conduit coupling the crankcase with a fresh air intake upstream of a compressor and an intake throttle; a second conduit coupling a fuel tank containing compressed natural gas with the first conduit and having a flow control valve arranged therein; a third conduit coupling the crankcase with the intake downstream of the throttle and having a PCV valve arranged therein; and a controller having executable instructions to deliver compressed natural gas from the second conduit to the first conduit and then into the crankcase responsive to a blow-by gas flow rate being less than a flow rate of the PCV valve and a manifold vacuum being greater than a crankcase vacuum. - View Dependent Claims (17, 18, 19)
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Specification