US 6,308,672 B1Granted

Front-mounting cam phaser module

AssigneeDelphi Technologies, Inc.

InventorsThomas Howard Lichti, Michael James Fox

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Abstract

A modular vane cam phaser assembly for controllably and continuously varying the rotational phase between a camshaft and the crankshaft of a reciprocating internal combustion engine. The module includes a housing mountable to the front of an engine head, the housing supporting on an outer surface thereof a programmably-controllable spool valve for directing pressurized oil to an oil commutator extending into both the housing and a vane phaser wherein a rotor is bolted to the camshaft and a stator is bolted to a timing sprocket. The oil is distributed by the spool valve to opposite sides of the rotor vanes in response to signals generated by an induction cam rotation sensor and by other engine components and processed by a powertrain control module to advance or retard the opening of intake and/or exhaust valves in the engine. The housing is provided with internal passages for supplying oil from an engine port to the spool valve. Preferably, the oil is filtered by a thimble screen as it enters the housing.

Claims11

Dependent claims

front-mounting camshaft phaser module for shifting rotational phase between an engine crankshaft and intake valve camshaft and between an engine crankshaft and an exhaust valve camshaft, comprising:

a) a housing connectable to said engine;
b) a first cam phaser sub-assembly including a timing sprocket, stator, rotor, a plurality of chambers formed between said stator and said rotor, cover plate, and oil commutator, said first phaser sub-assembly being disposed on an end of said intake valve camshaft and extending into a first well in said housing;
c) a second cam phaser sub-assembly including a timing sprocket, stator, rotor, a plurality of chambers formed between said stator and said rotor, cover plate, and oil commutator, said second phaser sub-assembly being disposed on an end of said exhaust valve camshaft and extending into a second well in said housing;
d) a first control valve sub-assembly disposed on an outer surface of said housing and having oil inlet and outlet ports in communication with said commutator in said first cam phaser sub-assembly for passing oil into and out of said chambers to vary the phase relationship between said crankshaft and said intake valve camshaft;
e) a second control valve sub-assembly disposed on an outer surface of said housing and having oil inlet and outlet ports in communication with said commutator in said second cam phaser sub-assembly for passing oil into and out of said chambers to vary the phase relationship between said crankshaft and said exhaust valve camshaft.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/632,990Filed 4 Aug 2000 · us provisional application
Priority: 5 Aug 1999
Granted: 30 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F01L 1/34
Valve-gear or valve arrangements, e.g. lift-valve gear: characterised by the provision of means for changing the timing of the valves without…
F01L 2001/028
Valve drive: pre-assembled timing arrangement, e.g. located in a cassette
F01L 2001/34426
Details relating to the hydraulic feeding circuit: oil control valves
F01L 2001/34433
Oil control valves: location oil control valves