Method for the emergency starting of an internal combustion engine in the case of a rotational speed sensor failure
AssigneeRobert Bosch GmbH
InventorsMichael Baeuerle, Klaus Ries-Mueller
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for starting a combustion engine that is equipped with a starter and a speed sensor which supplies an output signal as a function of the speed. Furthermore, a device for measuring the vehicle system voltage is provided which records the characteristic curve (3) of the battery voltage during starting phase (1) and after the starting phase (1). The crankshaft position is ascertained from the characteristic curve (3) of the battery voltage during the starting phase (1) of the combustion engine in starter operation.
Claims8
A method for starting a combustion engine that is equipped with a starter a speed sensor which supplies an output signal as a function of the speed;
- and furthermore, a device for measuring the battery voltage is provided which records the characteristic curve (3) of the battery voltage during starting phase (1) and after the starting phase (1), wherein the crankshaft position is determined from the characteristic curve (3) of the battery voltage during the starting phase (1) of the combustion engine in starter operation.
The method as recited in one or more of the preceding claims, wherein the correlation of the top dead center TDC (12) or bottom dead center BDC (13) of the cylinders of a combustion engine to the maxima (5.1 to 5.n) and minima (4.1 to 4.n), respectively, of the characteristic curve (3) of the battery voltage of the combustion engine is recorded in an engine speed/load map and stored.
The method as recited in one or more of the preceding claims, wherein after the position of TDC (12) and BDC (13) of the cylinders of a combustion engine has been allocated to the ascertained maxima (5.1 to 5.n) and minima (4.1 to 4.n) of the characteristic curve (3) of the battery voltage, a first injection and ignition (11) take place.
The method as recited in one or more of the preceding claims, wherein the characteristic curve of the battery voltage is used for the diagnosis or monitoring of the speed sensor or crankshaft sensor, and/or the phase sensor or camshaft sensor.
Dependencies are inferred from the claim text.