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US 8,739,768 B2Granted
Introduction of ventilation gases via individual passages to the intake ports
AssigneeGM Global Technology Operations LLC
InventorsMichael B. Fleck, Thomas A. Spix, Kevin M. Luchansky
Life of this patent
Estimating the term…
Abstract
An internal combustion engine includes a plurality of PCV ports formed internally within the engine block and the cylinder head. The PCV ports directly connect a crankcase chamber with each of a plurality of intake ports defined by the cylinder head. The blow-by gases that accumulate within the crankcase chamber are directly vented through the internal PCV ports into the intake ports.
Claims20
An internal combustion engine comprising:
- a block defining a crankcase chamber and at least one bore extending from and in fluid communication with the crankcase chamber;
- and
- at least one cylinder head attached to the block and defining at least one intake port in direct fluid communication with the at least one bore;
- wherein the block and the at least one cylinder head cooperate to define at least one Positive Crankcase Ventilation (PCV) port extending internally between and interconnecting in fluid communication the crankshaft chamber and the at least one intake port;
- and
- wherein the at least one PCV port vents gases from the crankcase chamber directly into the at least one intake port.
3 more elements
A V-style engine comprising:
- a V-style block defining a crankcase chamber and a plurality of bores extending from and in fluid communication with the crankcase chamber, with the plurality of bores grouped into a first bank of bores and a second bank of bores angularly offset from each other about a longitudinal axis of the V-style block;
- a first cylinder head attached to the V-style block adjacent the first bank of bores and defining a plurality of intake ports, with each of the plurality of intake ports of the first cylinder head in direct fluid communication with one of the bores of the first bank of bores;
- a second cylinder head attached to the V-style block adjacent the second bank of bores and defining a plurality of intake ports, with each of the plurality of intake ports of the second cylinder head in direct fluid communication with one of the bores of the second bank of bores;
- wherein the V-style block and the first cylinder head cooperate to define a first group of Positive Crankcase Ventilation (PCV) ports, with each PCV port of the first group of PCV ports extending internally between and interconnecting in fluid communication the crankshaft chamber and one of the intake ports of the first cylinder head, with each PCV port of the first group of PCV ports configured for venting gases from the crankcase chamber directly into one of the intake ports of the first cylinder head;
- and
- wherein the V-style block and the second cylinder head cooperate to define a second group of PCV ports, with each PCV port of the second group of PCV ports extending internally between and interconnecting in fluid communication the crankshaft chamber and one of the intake ports of the second cylinder head, with each PCV port of the second group of PCV ports configured for venting gases from the crankcase chamber directly into one of the intake ports of the second cylinder head.
3 more elements
A method of manufacturing an internal combustion engine, the method comprising:
- forming a plurality of Positive Crankcase Ventilation (PCV) ports internally through a cylinder head and an adjoining engine block to directly interconnect in fluid communication a crankcase chamber defined by the engine block with each of a plurality of intake ports defined by the cylinder head.
Dependencies are inferred from the claim text.