| 摘要 |
FIELD: engines and pumps.SUBSTANCE: electro-driven injector includes housing (1) with fuel supply channel (2) and drain channel (28), sleeve (19) of a multiplier, in which locking multiplier (20) is installed, which interacts with needle (7) through pusher (14) and forms one hydro-control chamber (29) that is interconnected with fuel supply channel (2) through jet nozzle (24) and through its control valve (30) to drain channel (28); spring-loaded pusher (32) of the control valve is connected to armature (33) of an electromagnet; sprayer (3) and needle (7) interact with locking multiplier (20) through pusher (14) and to its seat (4). Spacer plate (12) spring-loaded towards locking of needle (7) is installed between multiplier (20) and pusher (14). Such design of the injector allows increasing movement speed of needle (7) at the end of its stroke till shutoff of spraying openings (5) by using elastic deformation of pusher (14) in case length of pusher (14) does not allow a value of its elastic deformation equal to preliminary deformation of the pusher at assembly of the injector, which is added to needle (7) lift value, as well as reduction of cross-section of jet nozzles (24) for the purpose of economy of fuel consumed for control without any loss of speed of putting needle (7) onto seat (4).EFFECT: higher efficiency.7 cl, 5 dwg |
