Method for monitoring hydraulic pressure in inlet path of high pressure pump for high pressure fuel delivery in fuel injection system of internal combustion engine, involves interrupting fuel metering so that pressure deviation is produced

摘要

The method involves interrupting metering of fuel for high pressure delivery by a metering unit (5) mounted in an inlet path (1), and adjusting high-pressure delivery of a high-pressure pump (2), so that pressure deviation in a high pressure accumulator is produced during lack of high pressure delivery when fuel inlet pressure in the inlet path falls below a minimum value. The minimum inlet pressure is stopped over opening pressure of a connecting valve. A compression phase is formed within the metering unit. An independent claim is also included for a device for monitoring hydraulic pressure in an inlet path of a high pressure pump for high pressure delivery of fuel in a fuel injection system.