Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1998-02-19
1999-10-05
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9012, 123 9015, 123 9017, 123 9031, 123 9034, 74567, 74568R, 464 1, 464 2, 464 16, F01L 134
Patent
active
059607572
ABSTRACT:
A shoe housing 3 is connected to and rotatable together with an input shaft. A vane rotor 9 is connected to an output shaft and accommodated in shoe housing 3 so as to cause a rotation within a predetermined angle with respect to shoe housing 3. Vane rotor 9 and shoe housing 3 cooperatively define hydraulic chambers 10, 11, 12 and 13 whose volumes are variable in accordance with a rotational position of vane rotor 9 with respect to shoe housing 3. A locking member 7 is accommodated in vane rotor 9 and shiftable in a direction parallel to a rotational axis common to shoe housing 3 and vane rotor 9. And, an engaging bore 20, formed on a front plate 4 secured to shoe housing 3, receives locking member 7 through a tapered surface. With this arrangement, it becomes possible to provide a control apparatus for varying a rotational or angular phase between the input and output shafts, while adequately maintaining the durability of the apparatus with a simple configuration easy to manufacture and suitable for downsizing without causing hammering noises or increasing operational resistances.
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Lo Weilun
Nippondenso Co. Ltd.
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