Device for supplying fuel to metering device in exhaust gas after-treatment apparatus, used in common-rail fuel injection system of combustion engine, has low-pressure fuel storage unit that is connected with pressure-regulating valve

摘要

The device has a high-pressure fuel storage unit (18) provided with high pressure terminals (19) which are connected with fuel injectors. The controlled fuel is injected into a combustion chamber. The high-pressure fuel storage unit is interconnected with a high pressure control valve (20) such that fuel from the high-pressure fuel storage unit is redirected into a spacer (21). A pressure-regulating valve (24) is connected with a low-pressure fuel storage unit (22) which is connected with a low-pressure line (23) that is connected to a metering device.