SAE J 2948-2011 Keyless Ignition Control Design《无钥匙点火控制设计》.pdf

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1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there

2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m

3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U

4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/J2948_201101SURFACEVEHICLERECOMMENDEDPRACTICEJ2948 JAN2011 Issued 2011-01 Keyless Ignition Cont

5、rol Design RATIONALE This SAE Recommended Practice establishes guidelines for the operation of automotive keyless ignition systems with the goal of helping to minimize user instigated errors. 1. SCOPE This SAE Recommended Practice establishes guidelines for the operation of automotive keyless igniti

6、on systems with the goal of helping to minimize user instigated errors. For the purpose of this Recommended Practice, user instigated errors may include: the inability to start and stop the vehicle propulsion system, exiting the vehicle with the automatic transmission in a non-parking gear, exiting

7、the vehicle while the vehicle propulsion system is enabled, exiting the vehicle while the vehicle propulsion system is disabled, but the accessory or electrical systems are active. To help minimize these errors, this Recommended Practice contains design recommendations pertaining to uniform labeling

8、, operating logic, indication of vehicle ignition/control status, and physical control characteristics of keyless ignition systems. This Recommended Practice applies to keyless ignition controls permanently mounted in passenger cars, MPVs, and trucks 10 000 GVWR and under. It does not apply to remot

9、e start/remote stop systems that provide remote controls to start or stop a vehicle engine from outside the vehicle. SAE J2948 Issued JAN2011 Page 2 of 82. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwis

10、e indicated, the latest issue of SAE publications shall apply. 2.1.1 FMVSS Publications Available from U.S. Government Printing Office, Superintendent of Documents, Mail Stop: SSOP, Washington, DC 20402-9328. FMVSS 101 Controls and displays FMVSS 102 Transmission control functions FMVSS 114 Theft pr

11、otection and rollaway prevention 2.1.2 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.ISO 2575 Road vehicles - Symbols for controls, indicators and tell-tales: 2010, 8thEdition 3. TERMS AND DEFINITI

12、ONS For the purposes of this document, the following terms and definitions apply: 3.1 KEY CODE Electronic code which, when transmitted to and stored in the starting system software, allows the driver to select a vehicle ignition mode using a keyless ignition control. 3.2 KEY CODE CARRYING DEVICE Phy

13、sical device capable of transmitting an electronic key code to the vehicle starting system. 3.3 KEYLESS IGNITION CONTROL Permanently mounted physical device such as a pushbutton, rocker switch, multi-position control, or rotary control used to start or stop a vehicle propulsion system without need f

14、or insertion or removal of a conventional key from a keyslot. 3.4 KEYLESS IGNITION CONTROL ACTUATIONSMethod by which a keyless ignition control is physically pressed, rotated, or otherwise actuated by the driver in order to change vehicle ignition mode. NOTE: The method includes the duration of time

15、 that the control is actuated by the operator. Ignition control actuation methods and durations include: SAE J2948 Issued JAN2011 Page 3 of 83.4.1 SHORT ACTUATION Any single ignition control actuation duration less than a LONG ACTUATION as specified by the vehicle manufacturer, with the minimum acti

16、vation duration also specified by the vehicle manufacturer. NOTE: Actuation durations below the manufacturer specified minimum activation duration are ignored. 3.4.2 LONG ACTUATION Any single ignition control actuation longer than a SHORT ACTUATION with the minimum activation duration between 0.5 an

17、d 2 s as specified by the vehicle manufacturer. 3.4.3 MULTIPLE ACTUATION Sequence of two or three short ignition control actuations, occurring within a manufacturer-specified period of time that is at least three times the manufacturers minimum duration for a LONG ACTUATION but not more than 10 s. N

18、OTE: A multiple actuation is treated as a single ignition control actuation for the case of disabling a propulsion system in a non-stationary vehicle. In all other cases each of the 2 or 3 actuations may be treated as an individual short control actuation by the ignition system controller as specifi

19、ed by the vehicle manufacturer. 3.5 IGNITION MODES Propulsion and/or vehicle electrical states as determined by vehicle operating conditions and driver actuation of the keyless ignition control. Ignition modes include: 3.5.1 START MODE Transient mode where the vehicle propulsion system is initiated

20、(e.g., engine cranking), leading to RUN mode, while an electronic key code is present in the starting system. 3.5.2 RUN MODE Mode in which the vehicle propulsion system is enabled and an electronic key code is present in the starting system. NOTE: Automatic start/stop-equipped vehicles (reference FM

21、VSS 102, S3.1.3.1) remain in RUN MODE when automatic stop is engaged. 3.5.3 ELECTRICAL and ACCESSORY MODES Mode in which the vehicle propulsion system is disabled, the vehicle electrical system elements are active as determined by the vehicle manufacturer, and an electronic key code is present in th

22、e starting system. 3.5.4 STOP MODE Mode in which the vehicle propulsion and vehicle electrical systems are disabled and an electronic key code is not present in the starting system. NOTE: Vehicle manufacturers may choose to temporarily keep vehicle electrical systems active, and the key code in the

23、starting system in this mode until a trigger event occurs (such as a driver-door open event or timer event). This vehicle state is sometimes provided to allow use of in-vehicle displays and entertainment systems after the propulsion system is disabled. SAE J2948 Issued JAN2011 Page 4 of 83.6 PROPULS

24、ION SYSTEM System that when enabled provides forward or rearward movement for the vehicle in an amount proportional to what the driver commands. NOTE: In most vehicles, an internal combustion engine and transmission (often called a powertrain) is the propulsion system. 3.7 START/STOP A VEHICLE PROPU

25、LSION SYSTEM As used in this document, the terms “start” and “stop” in reference to a vehicle propulsion system mean to enable or disable, respectively, the vehicle propulsion system. 3.8 STATIONARY State in which the vehicle is not moving or is moving at a speed below the vehicle manufacturers spec

26、ified threshold. 3.9 NON-STATIONARY State in which the vehicle is moving at a speed at or above the vehicle manufacturers specified threshold. 4. DESIGN 4.1 Ignition Control Identification Keyless ignition controls that start or stop the propulsion system shall be readily identifiable by vehicle dri

27、vers. Examples of readily identifiable controls are those that include symbols and/or text defined per ISO 2575 and/or FMVSS 101. 4.2 Consistent Application of Time Durations and Methods to Change Vehicle Ignition Modes The actuation time durations and methods to change vehicle ignition modes shall

28、be consistently applied for a given vehicle model. 4.3 Starting and Stopping a Propulsion System in a Stationary Vehicle Sections 4.3.1 through 4.3.2.2 are specific for single pushbutton keyless ignition systems, but may also be appropriate for keyless ignition systems actuated by other controls, as

29、 determined by the vehicle manufacturer. 4.3.1 Start Conditions - Stationary Vehicle 1. Vehicle ignition is not in START or RUN MODE 2. Vehicle is STATIONARY 3. Automatic transmission: Brake pedal is depressed and transmission is in Park or Neutral 4. Manual transmission: Disengaged (i.e., the trans

30、mission is in Neutral and/or the clutch pedal is depressed) SAE J2948 Issued JAN2011 Page 5 of 84.3.1.1 All Start Conditions Met - Stationary Vehicle The vehicle propulsion system shall enter START or RUN MODE upon a short actuation. The vehicle propulsion system should enter START or RUN MODE upon

31、a long actuation of a keyless ignition control. A long actuation of the keyless ignition control shall keep the vehicle in START MODE or RUN MODE to prevent continuous on/off cycling of the propulsion system. 4.3.1.2 Start Condition #3 Not Met - Stationary Vehicle The vehicle propulsion system shall

32、 not enter START or RUN MODE upon any keyless ignition control actuation. The vehicle may enter other ignition modes as determined by the vehicle manufacturer. 4.3.2 Stop Conditions - Stationary Vehicle 1. Vehicle ignition is in RUN MODE 2. Vehicle is STATIONARY 3. Transmission is in Park position,

33、if equipped 4.3.2.1 All Stop Conditions Met - Stationary Vehicle The vehicle propulsion system shall enter STOP MODE upon a short actuation of a keyless ignition control. The vehicle propulsion system should enter STOP MODE upon a long actuation of a keyless ignition control. 4.3.2.2 Stop Condition

34、#3 Not Met - Stationary Vehicle The vehicle may enter ACCESSORY or ELECTRICAL MODES, but shall not enter STOP MODE when the keyless ignition control is actuated, unless the vehicle automatically shifts into Park with keyless ignition actuation. 4.4 Starting and Stopping a Propulsion System in a Non-

35、Stationary Vehicle Sections 4.4.1 through 4.4.2.1 are specific for single pushbutton keyless ignition systems, but may also be appropriate for keyless ignition systems actuated by other controls, as determined by the vehicle manufacturer. 4.4.1 Start Conditions - Non-Stationary Vehicle 1. Vehicle is

36、 not in START or RUN MODE 2. Vehicle is NOT STATIONARY 3. Vehicle transmission is in NEUTRAL or in a suitable drive gear as specified by the manufacturer 4.4.1.1 All Start Conditions Met - Non-Stationary Vehicle The vehicle propulsion system should enter START or RUN MODE upon a short actuation of a

37、 keyless ignition control. The vehicle propulsion system should also enter START or RUN MODE upon a long actuation of a keyless ignition control.SAE J2948 Issued JAN2011 Page 6 of 84.4.1.2 Starting Instructions - Non-Stationary Vehicle If additional steps are required by the driver to start a propul

38、sion system in a non-stationary vehicle, such as lightly pressing the brake pedal while actuating the keyless ignition control, clear instructions should be provided to the vehicle driver. Examples of clear instructions include illumination of an appropriately labeled telltale, or display of a text

39、message such as ”PRESS BRAKE AND IGNITION CONTROL SIMULTANEOUSLY TO RESTART VEHICLE” in the instrument cluster. 4.4.2 Stop Conditions - Non-Stationary Vehicle 1. Vehicle is in RUN MODE 2. Vehicle is NOT STATIONARY 4.4.2.1 Stop Conditions Met - Non-Stationary Vehicle The vehicle shall exit RUN MODE a

40、fter a long actuation of the keyless ignition control. The vehicle shall also exit RUN MODE after a multiple actuation of the keyless ignition control. The vehicle should not exit RUN MODE after a short actuation of the keyless ignition control. 4.5 Inadvertent Re-Activation Vehicle manufacturers sh

41、ould design keyless ignition systems to guard against inadvertent propulsion system re-activation in the event of repeated or sustained control actuations while the vehicle is in a non-stationary mode. This can be accomplished by, for example, providing a brief window (e.g., a few seconds) following

42、 deactivation during which additional or continuous control actuations are ignored (not acted upon) by the vehicle. 4.6 Steering System Locking The steering system shall not lock while the vehicle is moving. 4.7 Alerts and Status Indication 4.7.1 Driver Door Open/Closed Alerts To help minimize user-

43、instigated error states associated with: exiting a vehicle with the automatic transmission in a non-parking gear, exiting a vehicle while the vehicle propulsion system is enabled, exiting a vehicle while the vehicle propulsion system is disabled but the accessory or electrical systems are active. An

44、 audible alert to the driver shall be activated if the driver-side front door is opened while the starting system is in ACCESSORY, ELECTRICAL or RUN MODE. (See also, FMVSS 114, S5.1.3.) An externally audible or visual alert shall be activated when the starting system is in ACCESSORY, ELECTRICAL, or

45、RUN MODE, all doors become closed, and an electronic key code carrying device (e.g., keyfob) is not present in the vehicle.Alerts are not required if the vehicle automatically shifts to Park and enters STOP MODE whenever the electronic key code carrying device exits the vehicle or the driver door be

46、comes open while the starting system is in ACCESSORY or ELECTRICAL MODE. SAE J2948 Issued JAN2011 Page 7 of 84.7.2 Shift to Park Indication In order to discourage the driver from leaving a vehicle equipped with an automatic transmission in a gear position other than PARK, the driver should be prompt

47、ed to shift the vehicle to “PARK” or the vehicle should automatically shift to PARK upon, for example, the actuation of the keyless ignition control, the opening of the drivers door, or the expiration of a timer. 4.7.3 Propulsion Status Indication Vehicles should be equipped with a means to indicate

48、 to the driver the vehicle propulsion system status (e.g., propulsion system ON or OFF) and the active vehicle ignition mode (e.g., ACCESSORY, ELECTRICAL, IGNITION RUN). This can be accomplished by a variety of means including visual indication. Examples of acceptable visual indication include messa

49、ges in an instrument cluster (e.g., ACCESSORY MODE ACTIVE), illumination of a tell-tale on the keyless ignition control, pointer position showing engine RPMs on a tachometer, and/or illumination of a tell-tale in the instrument cluster or console. 4.8 Physical Control Characteristics 4.8.1 Control Use with a Gloved Hand Keyless ignition control designs should also take into consideration operation while we