Engine control unit

Abstract

The present invention relates to an engine control unit (16) of an internal combustion engine which is especially operated by diesel fuel, heavy fuel, or gas. The internal combustion engine has a fuel supply system, and specifically a common rail fuel supply system including solenoid actuators. The engine control unit (16) includes means (17, 18, 19) in order to automatically detect and evaluate an actual value of at least one magnetic variable of at least one solenoid actuator (15) in case the fuel supply system is depressurized during a stoppage of the internal combustion engine. When each actual value deviates from a corresponding target value by a predetermined amount or less, the engine control unit (16) automatically estimates a properly operating solenoid actuator. When each actual value deviates from a corresponding target value by a predetermined amount or more, the engine control unit (16) automatically estimates an improperly operating solenoid actuator.

Description

technical field [0001] The invention relates to an engine controller according to the preamble of claim 1 . Background technique [0002] figure 1 The basic design of a common rail fuel supply system known from the prior art for an internal combustion engine is shown. This construction is known from DE 101 57 135 B4. in this way, figure 1 The common rail fuel supply system comprises at least one injector 1 for each cylinder of the internal combustion engine. Via the injector 1 fuel can be injected into each of the cylinders of the internal combustion engine. Furthermore, the common-rail fuel supply system comprises a pump device 3 with at least one low-pressure pump 5, at least one high-pressure pump 2 and a high-pressure pump accumulator 8, in order to convey fuel from the low-pressure area 4 of the common-rail fuel supply system into its high-pressure area 6 , wherein a pressure storage system 7 permanently under high pressure is arranged in the high-pressure region 6...

AI Technical Summary

Problems solved by technology

However, this is only possible if maintenance work is to be carried out on the internal combustion engine anyway

There is therefore the risk that the magnetic actuator fails during operation outside regular maintenance intervals of the internal combustion engine and thus leads to an undesired shutdown of the internal combustion engine and thus to its cost-intensive downtime.

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