Fuel injection valve for internal combustion engine fuel system has piston component that operates control valve with sliding surface with low friction material coating

摘要

The fuel injection valve (1) has a nozzle part (101) with an injection bore opened and closed by a nozzle needle (5), a counter pressure control part (102), a low pressure source and a drive part with a displacement transfer chamber (3) for increasing/reducing a pressure with final control element (2) displacement and a piston component that operates the control valve (4). A sliding surface of the piston has a low friction material coating.