Induction system for internal combustion engine
AssigneeFord Motor Company
InventorsMichael A. Choma, William F. Stockhausen, Timo A. Wiemero
Life of this patent
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Abstract
An induction system for a multicylinder reciprocating internal combustion engine includes cylinder 8, cylinder head 10 having at least one intake poppet valve 12, and at least one exhaust poppet valve 14, with the induction system further including a crankcase ventilation system 26 for conducting gases from the crankcase of the engine to the cylinder head, and a PCV passage for introducing crankcase gases directly into at least one of the engine's intake ports 18. In the case wherein multiple intake valves and ports are used, PCV flow may be introduced through one port, with recirculated exhaust gas being introduced through a second intake port.
Claims23
An induction system for a multicylinder reciprocating internal combustion engine having a crankcase and an intake manifold, with each of said cylinders comprising:
- a cylinder head having at least one intake poppet valve and at least one exhaust poppet valve, with each of said intake valves being situated within an intake port extending through the cylinder head;
- a crankcase ventilation system for conducting gases from the crankcase of the engine to the cylinder head;
- and
- means located within the cylinder head, and connected with said crankcase ventilation system, for introducing said crankcase gases directly into at least one of said intake ports.
An induction system for a multicylinder reciprocating internal combustion engine having a crankcase, with each of said cylinders comprising:
- a cylinder head supplied with induction air by an intake manifold, with said cylinder head having at least two intake poppet valves and at least one exhaust poppet valve, with each of said intake valves being situated within a separate intake port extending through the cylinder head;
- a crankcase ventilation system for conducting gases from the crankcase of the engine to the cylinder head;
- means located within the cylinder head and connected with said crankcase ventilation system, for introducing said crankcase gases directly into at least one of said intake ports within said cylinder head;
- an exhaust gas recirculation system for recirculating a portion of the engine exhaust gases to the cylinder head;
- and
- means located within the cylinder head for introducing the recirculated exhaust gases directly into an intake port which is not equipped with said means for introducing crankcase gases.
An induction system for a multicylinder reciprocating internal combustion engine having a crankcase, with each of said cylinders comprising:
- a cylinder head supplied with induction air by an intake manifold, with said cylinder head having at least two intake poppet valves and at least one exhaust poppet valve, with each of said intake valves being situated within a separate intake port extending through the cylinder head, wherein said intake ports include low speed ports, fed by primary runners, with said low speed ports being used during all modes of engine operation, and high speed ports, fed by secondary runners, with said high speed ports being used during high power operation;
- a crankcase ventilation system for conducting gases from the crankcase of the engine to the cylinder head;
- an exhaust gas recirculation system for recirculating a portion of the engine exhaust gases to the cylinder head;
- and
- means located within the cylinder head and connected with said crankcase ventilation system and said exhaust gas recirculation system, for introducing said crankcase gases directly into a common intake port within said cylinder head.
Dependencies are inferred from the claim text.