US 10,889,300 B2
Method for controlling sudden unintended acceleration due to misoperation of engine in power split type HEV system
Jin-Kuk Cho, Goyang-si (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed on Oct. 29, 2018, as Appl. No. 16/173,798.
Claims priority of application No. 10-2017-0147360 (KR), filed on Nov. 7, 2017.
Prior Publication US 2019/0135288 A1, May 9, 2019
Int. Cl. B60W 30/188 (2012.01); B60K 6/485 (2007.10); B60W 10/08 (2006.01); B60W 20/13 (2016.01)
CPC B60W 30/1884 (2013.01) [B60K 6/485 (2013.01); B60W 10/08 (2013.01); B60W 20/13 (2016.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2240/441 (2013.01); B60L 2240/486 (2013.01); B60W 2510/0638 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for controlling a sudden unintended acceleration due to misoperation of an engine in a power split type hybrid electric vehicle (HEV) system, the method comprising:
when a determination is made that a delta revolution per minute (RPM) of the engine is out of a predetermined criterion, determining that an operating point of the engine does not move along a profile defined according to a target operating point of the engine and the sudden unintended acceleration is possible,
wherein the delta RPM is a difference of value between a current RPM of the engine and a profile RPM of the engine required to move to the target operating point of the engine from a current operating point of the engine;
wherein the determination that the delta RPM of the engine is out of the predetermined criterion is made by:
calculating the delta RPM;
calculating a slope of the delta RPM;
determining whether or not the slope of the delta RPM exceeds a predetermined value B;
calculating a holding time for which the slope of the delta RPM exceeds the predetermined value B; and
determining whether or not the holding time exceeds a predetermined value C;
wherein when a determination is made that the sudden unintended acceleration is possible, a control torque of 0 Nm is output by a generator.