Said hydraulic coupling advantageously effects play compensation and a stroke boosting action. Hydraulic coupling between the piezo actuator and the nozzle needle is made possible by the first and the second control chamber and the connection for fluid communication between the two control chambers. F02M2547/001- Control chambers formed by movable sleeves.F02M2547/00- Special features for fuel-injection valves actuated by fluid pressure.between piezoelectric actuator and needle valve or pump plunger hydraulic F02M2200/703- Linkage between actuator and actuated element, e.g.between piezoelectric actuator and needle valve or pump plunger F02M2200/70- Linkage between actuator and actuated element, e.g.F02M2200/00- Details of fuel-injection apparatus, not otherwise provided for.F02M47/027- Electrically actuated valves draining the chamber to release the closing pressure.having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure F02M47/02- Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e.F02M47/00- Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure.using solenoid using piezoelectric or magnetostrictive actuators F02M63/0026- Valves characterised by the valve actuating means electrical, e.g.F02M63/0015- Valves characterised by the valve actuating means electrical, e.g.F02M63/0014- Valves characterised by the valve actuating means.F02M63/00- Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00 Combination of fuel pump with other devices, e.g.

F02M- SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF.

F02- COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS.

F- MECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING.

Assignors: CONTINENTAL AUTOMOTIVE GMBH Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links Assignors: JAGANI, JIGNESH, KEREKGYARTO, JANOS, KROTOW, Ivan, SCHÜRZ, Willibald Publication of US20150292462A1 publication Critical patent/US20150292462A1/en Application granted granted Critical Publication of US10508635B2 publication Critical patent/US10508635B2/en Assigned to Vitesco Technologies GmbH reassignment Vitesco Technologies GmbH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from DE102012222509 external-priority Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH Assigned to CONTINENTAL AUTOMOTIVE GMBH reassignment CONTINENTAL AUTOMOTIVE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee Continental Automotive GmbH Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Jignesh Jagani Janos Kerekgyarto Ivan Krotow Willibald Schuerz Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number US14/649,997 Other versions US20150292462A1

Piezo injector pressure range