Patent ID: 11873777
Assignee: HYUNDAI KEFICO CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 8:
9. An apparatus for addressing a cam angle sensor error of a mild hybrid system, the apparatus comprising:
a Mild Hybrid Starter and Generator (MHSG) configured to perform a start-up using power from a high-voltage battery or charge the high-voltage battery by generating power using output of an engine;
a starter motor configured to start the engine;
a cam angle sensor configured to detect a rotational position or a rotational angle of a camshaft;
a crank angle sensor configured to detect a rotational position or a rotational angle of a crankshaft; and
a controller configured to control start of the engine on the basis of output from the cam angle sensor and the crank angle sensor;
wherein the controller determines whether an engine rpm immediately after the start-up follows an idle target rpm when an engine rpm at an end of cranking for the start-up exceeds a preset reference rpm using the MHSG, checks whether there is an error in the cam angle sensor when poor following, in which the engine rpm immediately after the start-up does not follow the idle target rpm, is generated, forcibly changes an engine state into a cranking state when the error is found in the cam angle sensor, and executes an existing backup crank logic that decreases a target rpm of the MHSG and finds out a fuel injection time while performing a test injection using a signal from the crank angle sensor.