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(12) United States Patent (10) Patent No.: US 8,942,911 B2 Debs Et Al

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(12) United States Patent (10) Patent No.: US 8,942,911 B2 Debs Et Al USOO8942911 B2 (12) United States Patent (10) Patent No.: US 8,942,911 B2 Debs et al. (45) Date of Patent: Jan. 27, 2015 (54) SYSTEMAND METHOD FOR DETECTINGA USPC ....... 701/107: 701/110, 701/114; 123/198 D; STUCK VEHICLE ACCELERATOR AND 123/682:123/590 REMEDIAL CONTROL (58) Field of Classification Search CPC .......... F02D 1 1/107; F02D 2009/0277; F02D (75) Inventors: William E. Debs, Novi, MI (US); Brian 2011/108; F02D 2200/501; F02D 2200/602; S. Schang. Wixom, MI (US); J. Oscar FO2D 225O/26 USPC .......... 701/103, 110, 107, 114:123/396, 399, Aparicio, Jr., Milford, MI (US); Paul A. 123/198 D, 492, 682, 687, 688, 690 Bauerle, Fenton, MI (US); Joseph E. See application file for complete search history. Ploucha, Commerce Township, MI (US); Daniel G. Bolstrum, West Bloomfield, (56) References Cited MI (US) U.S. PATENT DOCUMENTS (73) Assignee: GM Global Technology Operations 3,731,663 A * 5, 1973 Hollins ......................... 123,397 LLC 4472,777 A * 9/1984 Youngblood ................. TO1,110 (*) Notice: Subject to any disclaimer, the term of this (Continued) patent is extended or adjusted under 35 U.S.C. 154(b) by 1193 days. FOREIGN PATENT DOCUMENTS DE 3715959 11, 1988 (21) Appl. No.: 12/764,580 DE 4017045 11, 1991 (22) Filed: Apr. 21, 2010 (Continued) OTHER PUBLICATIONS (65) Prior Publication Data Office Action dated Dec. 30, 2011 from the German Patent Office for US 2011 FO264354 A1 Oct. 27, 2011 German Patent Application No. 10 2011 017412.5, 6 pages. (51) Int. C. Primary Examiner — Mahmoud Gimie G06F 700 (2006.01) Assistant Examiner — David Hamaoui G06F I7/00 (2006.01) F02B 77/08 (2006.01) (57) ABSTRACT B60K 26/02 (2006.01) A control system for a vehicle includes an error detection (Continued) module and a remedial control module. The error detection (52) U.S. C. module detects whether an accelerator of the vehicle is stuck CPC .............. B60K 26/02 (2013.01); F02D 1 1/105 is based on vehicle speed, a position of the accelerator, and (2013.01); F02D 1 1/107 (2013.01); B60W. one of a pressure applied to a brake of the vehicle and a status 10/06 (2013.01); B60W 2510/186 (2013.01); of a parking brake of the vehicle. The remedial control mod B60W 2.520/10 (2013.01); B60W 2540/10 ule, when the accelerator is stuck, at least one of resets the (2013.01); B60W 2540/12 (2013.01); F02D position of the accelerator and decreases torque output of a 1 1/106 (2013.01); F02D 2011/108 (2013.01); powertrain system. F02D 2200/501 (2013.01); F02D 2200/602 (2013.01); F02D 2250/26 (2013.01) 22 Claims, 3 Drawing Sheets -2sActive Accelerato Stuck? 108 N Owerride Y Control? 12 Decrease Torque Output Reset Accelerator Position US 8,942.911 B2 Page 2 (51) Int. Cl. 7,070,247 B2 T/2006 Offerle (2006.01) 7,226,389 B2 6, 2007 Steen et al. (2006.01) 7.447,585 B2 11/2008 Tandy et al. 8,291,883 B2 * 10/2012 Ludwigsen . 123, 198 DC References Cited 8.425,380 B2 * 4/2013 Yamazaki . 477,204 (56) 2007.0034440 A1 2, 2007 Zomotor U.S. PATENT DOCUMENTS FOREIGN PATENT DOCUMENTS 4,640,248 A * 2, 1987 Stoltman ....................... 123,399 4,987,872 A * 1, 1991 Geselle et al. 123,396 DE 1992O851 5, 2004 5,150,681 A * 9, 1992 Kull et al. ... 123,399 DE 102005OO1550 A1 T 2006 5,529,039 A * 6, 1996 Streib ........................... 123,399 EP O230722 A1 11, 1986 ck 5,780,782 A 7, 1998 O'Dea GB 2226658 A 7, 1990 . FO2D 41/02 6,324.459 B1* 11/2001 Jung ............................... 7O 1/70 KR 2005034.865 A ck 4/2005 6,419,037 B1 T/2002 Kramer et al. 6,442.468 B2 8, 2002 Nishimura * cited by examiner U.S. Patent US 8,942,911 B2 07 | | ;|Gi7; |-----···---···---······|----------------------------# #7ff7 09 U.S. Patent US 8,942,911 B2 GN 9 LL | 0/09| | | U.S. Patent Jan. 27, 2015 Sheet 3 of 3 US 8,942,911 B2 -2sActive? Accelerator Stuck? Override Control? 112 Decrease Torque Output Reset ACCelerator POSition FIG. 3 US 8,942,911 B2 1. 2 SYSTEMAND METHOD FOR DETECTING A FIG. 1 is a functional block diagram of an exemplary STUCK VEHICLE ACCELERATOR AND powertrain system according to the present disclosure; REMEDAL CONTROL FIG. 2 is a functional block diagram of a control module according to the present disclosure; and FIELD FIG. 3 is a flow diagram of an exemplary method for detecting a stuck accelerator and remedially controlling a The present disclosure relates to vehicle control systems, powertrain according to the present disclosure. and more particularly to a system and method for detecting a stuck vehicle accelerator and remedially controlling a pow DETAILED DESCRIPTION ertrain system of the vehicle. 10 The following description is merely exemplary in nature BACKGROUND and is in no way intended to limit the disclosure, its applica tion, or uses. For purposes of clarity, the same reference The background description provided herein is for the pur numbers will be used in the drawings to identify similar pose of generally presenting the context of the disclosure. 15 elements. As used herein, the phrase at least one of A, B, and Work of the presently named inventors, to the extent it is C should be construed to mean a logical (A or B or C), using described in this background section, as well as aspects of the a non-exclusive logical or. It should be understood that steps description that may not otherwise qualify as prior art at the within a method may be executed in different order without time offiling, are neither expressly nor impliedly admitted as altering the principles of the present disclosure. prior art against the present disclosure. As used herein, the term module refers to an Application Internal combustion engines combust an air/fuel (A/F) Specific Integrated Circuit (ASIC), an electronic circuit, a mixture within cylinders to drive pistons that rotatably turn a processor (shared, dedicated, or group) and memory that crankshaft generating drive torque. The drive torque may be execute one or more Software or firmware programs, a com transferred to a driveline (e.g., wheels) of a vehicle via a binational logic circuit, and/or other Suitable components that transmission. Air may be drawn into an intake manifold of the 25 provide the described functionality. engine through an inlet that may be regulated by a throttle. During vehicle operation an accelerator (e.g., a pedal) may The throttle may be controlled either mechanically or elec become physically and unintentionally displaced. In other tronically based on input from a driver of the vehicle. The words, the accelerator may become “stuck.” For example, the driver input may include acceleration based on a position of accelerator may become stuck due to improperly placed and/ an accelerator (e.g., a pedal). 30 or improperly designed floor mats or due to other loose objects obstructing the accelerator. The stuck accelerator may SUMMARY increase torque output of a powertrain and thus increase a speed of the vehicle above a desired speed. Moreover, when A control system for a vehicle includes an error detection the accelerator becomes stucka driver of the vehicle may then module and a remedial control module. The error detection 35 be unable to decrease the speed of the vehicle. More specifi module detects whether an accelerator of the vehicle is stuck cally, brakes may be insufficient to decrease the speed of the is based on vehicle speed, a position of the accelerator, and vehicle. In other words, the brakes may be unable to over one of a pressure applied to a brake of the vehicle and a status power the torque output of the powertrain to allow the driver of a parking brake of the vehicle. The remedial control mod to decrease the speed of the vehicle. ule, when the accelerator is stuck, at least one of resets the 40 Accordingly, a system and method are presented that detect position of the accelerator and decreases torque output of a when the accelerator is stuck and then remedially control the powertrain system. powertrain to allow the driver to decrease the speed of the A method for controlling a vehicle includes detecting vehicle. More specifically, the system and method may detect whether an accelerator of the vehicle is stuck is based on whether the accelerator is stuck based on vehicle speed, vehicle speed, a position of the accelerator, and one of a 45 accelerator position, brake pressure, and corresponding pressure applied to a brake of the vehicle and a status of a thresholds. For example, the brake pressure (and duration) parking brake of the vehicle, and when the accelerator is may be used to prevent false detections (e.g., drivers that stuck, at least one of resetting the position of the accelerator simultaneously command the accelerator and the brake, also and decreasing torque output of a powertrain system. known as “two-footed drivers'). Additionally or alternatively, In still other features, the systems and methods described 50 the system and method may detect whether the accelerator is above are implemented by a computer program executed by stuck based on vehicle speed, accelerator position, a status of one or more processors. The computer program can reside on a parking brake, and corresponding thresholds. The system a tangible computer readable medium Such as but not limited and method, however, may also determine that the accelerator to memory, nonvolatile data storage, and/or other Suitable is stuck based on other combinations of inputs (e.g., input tangible storage mediums.
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