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1. WO2020102139 - VALVE SEAT INSERT FOR ENGINE HAVING DOUBLE-CROWNED SEATING SURFACE PROFILED FOR LIMITING VALVE RECESSION

Publication Number WO/2020/102139
Publication Date 22.05.2020
International Application No. PCT/US2019/060837
International Filing Date 12.11.2019
IPC
F01L 3/22 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
3Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
22Valve seats not provided for in preceding subgroups of this group; Fixing of valve seats
F01L 3/20 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
3Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
20Shapes or constructions of valve members, not provided for in preceding subgroups of this group
F01L 3/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
3Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
Applicants
  • CATERPILLAR INC. [US]/[US]
Inventors
  • HATTIANGADI, Ashwin
  • QU, Rong
  • KUMAR, Sanjay
  • YODER, Kevin D.
Agents
  • COHEN, Charles S.
  • BECKMAN, William A.
  • CARTER, Janda M.
  • EARLE, Kevin C.
  • ROBERSON, Keith P.
Priority Data
16/188,57713.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) VALVE SEAT INSERT FOR ENGINE HAVING DOUBLE-CROWNED SEATING SURFACE PROFILED FOR LIMITING VALVE RECESSION
(FR) PIÈCE RAPPORTÉE DE SIÈGE DE SOUPAPE POUR MOTEUR AYANT UNE SURFACE DE SIÈGE À DOUBLE BOMBAGE PROFILÉE POUR LIMITER LE RENFONCEMENT DE SOUPAPE
Abstract
(EN)
A valve seat insert (38) for a gas exchange valve (24) controlling gas exchange of a cylinder (16) includes an insert body (40) having an inner peripheral surface (52), an outer peripheral surface (56), and a valve seating surface (59) structured to contact the gas exchange valve (24) at a closed position and profiled to limit valve recession thereof. The valve seating surface (59) includes an arrangement of linear segments and curved segments forming crowns (64) to contact the gas exchange valve (24) at different wear states.
(FR)
Cette invention concerne une pièce rapportée de siège de soupape (38) pour une soupape d'échange gazeux (24) commandant l'échange gazeux d'un cylindre (16), comprenant un corps de pièce rapportée (40) ayant une surface périphérique interne (52), une surface périphérique externe (56), et une surface de siège de soupape (59) structurée pour entrer en contact avec la soupape d'échange gazeux (24) dans une position fermée et profilée pour limiter le renfoncement de soupape de celle-ci. La surface de siège de soupape (59) comprend un agencement de segments linéaires et de segments incurvés formant des bombages (64) pour entrer en contact avec la soupape d'échange gazeux (24) à différents états d'usure.
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