Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-04-12
2005-04-12
Kwon, John T. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C251S129040, C701S101000
Reexamination Certificate
active
06877487
ABSTRACT:
An internal combustion engine (10) is operated by a method wherein the fuel is supplied via a magnetic valve (28) having a coil (34). The injected fuel quantity is influenced by the duration of the drive of the magnetic valve (28). In the method, the temperature (evtmod) of a region (26) of the magnetic valve (28) is determined and the drive duration is corrected in dependence upon temperature. In order to make the correction still more precise, a temperature (evtmod) of the magnetic valve (28) is determined from at least one usually measured temperature (tans, tmot) and the drive duration (ti_tvu_w) is so corrected (tvsp_w) that the temperature dependency of the characteristics of the magnetic coil (34) of the magnetic valve (28) is considered. Furthermore, a model is suggested in which (starting from an operating temperature) the temperature trace is simulated after shut-off of the engine and/or for the restart of the engine by means of two factors for the warmup and cool down.
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Guenther Achim
Hundhausen Manfred
Vogt Bernhard
Wenzler Thomas
Kwon John T.
Ottesen Walter
Robert & Bosch GmbH
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