CN103350677B - Keyless starting and keyless entry system and working method thereof - Google Patents
Keyless starting and keyless entry system and working method thereof Download PDFInfo
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- CN103350677B CN103350677B CN201310314867.XA CN201310314867A CN103350677B CN 103350677 B CN103350677 B CN 103350677B CN 201310314867 A CN201310314867 A CN 201310314867A CN 103350677 B CN103350677 B CN 103350677B
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Abstract
The invention discloses a keyless starting and keyless entry system and a working method of the keyless starting and keyless entry system. The safety level of an ABS control module of the keyless starting and keyless entry system is a B level, and the safety level of a PEPS control module with a main control unit is a B level. A wheel speed collecting module comprises a fourth wheel speed sensor for collecting the wheel speed of the rear right wheel of an automobile. The ABS control module is used for transmitting the rear right wheel speed which is regarded as the automobile speed to the PEPS control module through a rigid line. The PEPS control module is used for controlling an electronic type steering lock cylinder to be unlocked to make the electronic type steering lock cylinder not to be capable of locking a direction tubular column when an ignition signal of the automobile is OFF and the automobile speed is lower than or equal to a set automobile speed threshold value. According to the keyless starting and keyless entry system and the working method of the keyless starting and keyless entry system, a safety level ASIL D is divided into a mode of ASIL B + ASIL B, and the requirement of the ASIL D of the system can be achieved. Due to the fact that the PEPS control module is simply provided with one main control module, the cost of the whole system is reduced, and the reliability of the whole PEPS system is improved at the same time.
Description
Technical field
The present invention relates to automobile automation field, particularly relate to a kind of without key startup and keyless access system and method for work thereof.
Background technology
Start and keyless access system without key, hereinafter referred to as PEPS (Passive entry & pushstart) system, the generation of following fail safe possibility need be considered: vehicle in the process of moving when designing, electronic type steering hub column is locked, be called for short ESCL (Electronic steering columnlock) below by steering hub column locking, thus cause serious consequence.According to ISO26262, analyze this failure mode from aspects such as the injury order of severity (S), probability of occurrence (E) and controllable degrees (C), known:
1. S value is 3, if steering hub column is locked by ESCL in normal driving process, can cause to lose control of one's vehicle and damage, and possibility threat to life;
2. E value is 4, occurs in expressway, expressway and urban highway etc. and all can damage;
3. C value is 3, and steering hub column locking accident in the process of moving occurs, and chaufeur will be difficult to control vehicle.
According to this, the safe class of PEPS system is S3+E4+C3, and namely safe class is ASIL D.
The PEPS system meeting ASIL D adopts that PEPS its own system is ASIL D, system associated with it is QM (namely can be met the demands by quality control) usually, Fig. 1 shows and of the prior artly to start and the functional-block diagram of keyless access system without key, as shown in Figure 1:
PEPS controller adopts two main control units (the first main control unit and the second main control unit), and adopts two-way independently incoming signal; In PEPS system, the control of ESCL is realized by LIN line; As shown in Figure 1, the first main control unit be specially in PEPS controller gathers off front wheel wheel speed signal, second main control unit gathers the near front wheel wheel speed signal, PEPS controller is by contrasting two paths of signals, judge whether current vehicle speed is less than speed of a motor vehicle threshold value (this threshold value is 4km/h usually), if the speed of a motor vehicle is less than this speed of a motor vehicle threshold value, then PEPS controller exports UNLOCK signal to ESCL all the time, i.e. unlocking signal, makes ESCL to pin steering hub column.
Above-mentioned prior art start without key and the defect of keyless access system is: be ASIL D for ensureing that PEPS system reaches security function grade, PEPS system need adopt the scheme of dual master control unit, which increases the cost of PEPS system.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, the met safe class providing a kind of low cost is starting without key of ASIL D and keyless access system and method for work thereof, it significantly reduces the cost of PEPS controller, improves the reliability of whole PEPS system.
For achieving the above object, described without key startup and keyless access system, be characterized in, describedly to start without key and keyless access system comprises measuring wheel speed module, ABS control module, PEPS control module and electronic type and turns to lock, the safe class of described ABS control module is B level, described PEPS control module has a main control unit, and the safe class of this PEPS control module is B level; Wherein,
Described measuring wheel speed module comprises the fourth round speed sensor of the off hind wheel wheel speed for gathering automobile;
Described ABS control module is used for, by rigid line, the off hind wheel wheel speed as the speed of a motor vehicle is transferred to described PEPS control module; Further,
The ignition signal that described PEPS control module is used for when automobile is OFF, and when the described speed of a motor vehicle is less than or equal to the speed of a motor vehicle threshold value of setting, controls described electronic type and turn to lock to unlock, and turns to lock to pin steering hub column to make this electronic type;
Described without key start and keyless access system also comprise ignition control module; Further,
Described measuring wheel speed module also comprises the first wheel speed sensors of the near front wheel wheel speed for gathering automobile, for gathering the second wheel speed sensors of the off front wheel wheel speed of automobile, and for the third round speed sensor of the left rear wheel wheel speed that gathers automobile;
Described ABS control module also for going out reference speed according to described the near front wheel wheel speed, off front wheel wheel speed and left rear wheel wheel speed calculation, and for described reference speed being transferred to described ignition control module by high-speed CAN bus; Described ignition control module is used for, by low speed CAN, described reference speed is transferred to described PEPS control module;
The ignition signal that described PEPS control module is used for when automobile is OFF, and when the described speed of a motor vehicle and reference speed are less than or equal to described speed of a motor vehicle threshold value simultaneously, control described electronic type and turn to lock to unlock, and turns to lock to pin steering hub column to make this electronic type.
Preferably, the speed of a motor vehicle threshold value of described setting is 4km/h.
Preferably, described first wheel speed sensors, the second wheel speed sensors, third round speed sensor or fourth round speed sensor are electromagnetism or light electricity velocity sensor.
Describedly start and the method for work of keyless access system without key, be characterized in, described method of work comprises,
Step one: the near front wheel wheel speed of described measuring wheel speed module acquires automobile, off front wheel wheel speed, left rear wheel wheel speed and off hind wheel wheel speed;
Step 2: the off hind wheel wheel speed as the speed of a motor vehicle is transferred to described PEPS control module by rigid line by described ABS control module; Meanwhile, described ABS control module goes out reference speed according to described the near front wheel wheel speed, off front wheel wheel speed and left rear wheel wheel speed calculation, and by high-speed CAN bus, described reference speed is transferred to described ignition control module; Described reference speed is transferred to described PEPS control module by low speed CAN by described ignition control module;
Step 3: the size of the speed of a motor vehicle threshold value of the more described speed of a motor vehicle and reference speed and setting respectively;
Step 4: when the ignition signal of automobile is OFF, and when the described speed of a motor vehicle and reference speed are less than or equal to described speed of a motor vehicle threshold value simultaneously, described PEPS control module controls described electronic type and turns to lock to unlock, and turns to lock to pin steering hub column to make this electronic type.
Preferably, in described step 2, the method for calculating of described reference speed comprises,
When described first wheel speed sensors, the second wheel speed sensors and third round speed sensor all effectively time, described reference speed is the aviation value of described the near front wheel wheel speed, off front wheel wheel speed and left rear wheel wheel speed three;
When described first wheel speed sensors and the second wheel speed sensors are all effective, and when described third round speed sensor is invalid, described reference speed is the aviation value of both described the near front wheel wheel speed and off front wheel wheel speed;
When described first wheel speed sensors and third round speed sensor all effective, and when described second wheel speed sensors is invalid, described reference speed is the aviation value of both described the near front wheel wheel speed and left rear wheel wheel speed;
When described second wheel speed sensors and third round speed sensor all effective, and when described first wheel speed sensors is invalid, described reference speed is the aviation value of both off front wheel wheel speed and left rear wheel wheel speed;
When described first wheel speed sensors is effective, and described second wheel speed sensors and third round speed sensor all invalid time, described reference speed is described the near front wheel wheel speed;
When described second wheel speed sensors is effective, and described first wheel speed sensors and third round speed sensor all invalid time, described reference speed is described off front wheel wheel speed;
When described third round speed sensor is effective, and described first wheel speed sensors and the second wheel speed sensors all invalid time, described reference speed is described left rear wheel wheel speed; Further,
When described first wheel speed sensors, the second wheel speed sensors and third round speed sensor is all invalid, described reference speed is 0.
Preferably, judge whether described first wheel speed sensors has output; If have, then determine that described first wheel speed sensors is effective; Otherwise determine described first wheel speed sensor failure;
Judge whether described second wheel speed sensors has output; If have, then determine that described second wheel speed sensors is effective; Otherwise determine that described second wheel speed sensors lost efficacy;
Judge whether described third round speed sensor has output; If have, then determine that described third round speed sensor is effective; Otherwise determine described third round speed sensor failure.
Beneficial effect of the present invention is,
(1) the present invention has ABS control module and the PEPS control module that safe class is B level, according to ISO26262, makes the safe class of whole system be D level.In other words, the present invention, by decomposing the form that safe class ASIL D is ASIL B+ASIL B, can reach the requirement of system-level ASILD, because PEPS control module only has a main control unit, because this reducing the cost of whole system, improve the reliability of whole PEPS system simultaneously;
(2) the present invention utilizes CAN and rigid line to take two-way to detect to independently incoming signal to confirm, ensure that correctness and the reliability of signal transmission.
Accompanying drawing explanation
Fig. 1 shows and of the prior artly to start and the functional-block diagram of keyless access system without key.
Fig. 2 shows and of the present inventionly to start and the functional-block diagram of keyless access system without key.
Fig. 3 shows the inner structure schematic diagram that the PEPS control module shown in Fig. 2 and electronic type turn to lock, and PEPS control module and electronic type turn to the signal connection diagram between lock.
Fig. 4 shows of the present invention startup without key and the diagram of circuit of method of work of keyless access system.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
With reference to Fig. 2 and Fig. 3, describedly to start without key and keyless access system comprises measuring wheel speed module (not shown), ABS control module 3, PEPS control module 5 and electronic type and turns to lock 2, the safe class of described ABS control module 3 is B level, described PEPS control module 5 has a main control unit, and the safe class of this PEPS control module 5 is B level.
Particularly, described measuring wheel speed module comprises the fourth round speed sensor of the off hind wheel wheel speed RR for gathering automobile.
Off hind wheel wheel speed RR as the speed of a motor vehicle is transferred to described PEPS control module 5 by rigid line by described ABS control module 3.Described PEPS control module 5 judges the size of the speed of a motor vehicle threshold value of the described speed of a motor vehicle and setting, and when the ignition signal of automobile is OFF, and the described speed of a motor vehicle is when being less than or equal to the speed of a motor vehicle threshold value of setting, controlling described electronic type turns to lock 2 to unlock, and turns to lock 2 to pin steering hub column to make this electronic type.The speed of a motor vehicle threshold value of described setting is preferably set to 4km/h.
The present invention has ABS control module 3 and the PEPS control module 5 that safe class is B level, and according to ISO26262, this kind of design makes the safe class of whole system be D level.In other words, the present invention, by decomposing the form that safe class ASIL D is ASIL B+ASIL B, can reach the requirement of system-level ASIL D, because PEPS control module 5 only has a main control unit, because this reducing the cost of whole system.
Further, in order to ensure correctness and the reliability of signal transmission of the present invention, the basis of technique scheme having been done again following improvement, has referred again to Fig. 2 and Fig. 3:
Described without key start and keyless access system also comprise ignition control module 4; And, described measuring wheel speed module also comprises first wheel speed sensors of the near front wheel wheel speed FL for gathering automobile, for gathering second wheel speed sensors of the off front wheel wheel speed FR of automobile, and for the third round speed sensor of the left rear wheel wheel speed RL that gathers automobile.
Described ABS control module 3 calculates reference speed (then converting CAN signal to) according to described the near front wheel wheel speed FL, off front wheel wheel speed FR and left rear wheel wheel speed RL, and by high-speed CAN bus, described reference speed is transferred to described ignition control module 4; Described ignition control module 4 is for transferring to described PEPS control module 5 by low speed CAN by described reference speed.Here, described ignition control module 4 is equivalent to a gateway.
Described PEPS control module 5 is receiving the speed of a motor vehicle and reference speed these two independently after speed information, by comparing the conformability of two signals, determine that it turns to the control of lock 2 for electronic type, particularly: described PEPS control module 5 judge the described speed of a motor vehicle and reference speed respectively with the size of speed of a motor vehicle threshold value of setting, and when the ignition signal of automobile is OFF, and the described speed of a motor vehicle and reference speed are when being less than or equal to described speed of a motor vehicle threshold value simultaneously, controlling described electronic type turns to lock 2 to unlock, and turns to lock 2 to pin steering hub column to make this electronic type.Particularly: only when ignition signal is OFF (namely power supply is in IG OFF), PEPS control module 5 out-put supply signal ESCL PS turns to the control module of lock 2 to electronic type, if when now the described speed of a motor vehicle and reference speed are less than or equal to described speed of a motor vehicle threshold value simultaneously, the mouth LOCK_GND of PEPS control module 5 is all the time to high-order, namely in this condition, electronic type turns to the electromagnetic valve in lock 2 to be failure to actuate all the time, thus makes electronic type turn to lock 2 to pin steering hub column.
Above-mentioned improvement project, utilizes CAN and rigid line to take two-way to detect to independently incoming signal and confirms to have highly reliable safety and high-intelligentization.
Further, described first wheel speed sensors, the second wheel speed sensors, third round speed sensor or fourth round speed sensor are electromagnetism or light electricity velocity sensor.
Fig. 4 is of the present invention to be started without key and the diagram of circuit of method of work of keyless access system, and as shown in Figure 4, the described method of work without key startup and keyless access system comprises the following steps:
Step one: the near front wheel wheel speed FL, the off front wheel wheel speed FR of measuring wheel speed module acquires automobile, left rear wheel wheel speed RL and off hind wheel wheel speed RR;
Step 2: the off hind wheel wheel speed RR as the speed of a motor vehicle is transferred to described PEPS control module 5 by rigid line by ABS control module 3; Meanwhile, described ABS control module 3 calculates reference speed according to described the near front wheel wheel speed FL, off front wheel wheel speed FR and left rear wheel wheel speed RL, and by high-speed CAN bus, described reference speed is transferred to described ignition control module 4; Described reference speed is transferred to described PEPS control module 5 by low speed CAN by described ignition control module 4;
Step 3: the size of the speed of a motor vehicle threshold value of the more described speed of a motor vehicle and reference speed and setting respectively;
Step 4: when the ignition signal of automobile is OFF, and the described speed of a motor vehicle and reference speed are when being less than or equal to described speed of a motor vehicle threshold value simultaneously, described PEPS control module 5 controls described electronic type and turns to lock 2 to unlock, and turns to lock 2 to pin steering hub column to make this electronic type.
Structure following table below, illustrates in above-mentioned steps two, the method for calculating of described reference speed.
The method of calculating of described reference speed comprises:
When described first wheel speed sensors, the second wheel speed sensors and third round speed sensor is all effective, described reference speed is the aviation value of described the near front wheel wheel speed FL, off front wheel wheel speed FR and left rear wheel wheel speed RL three;
When described first wheel speed sensors and the second wheel speed sensors are all effective, and when described third round speed sensor is invalid, described reference speed is the aviation value of both described the near front wheel wheel speed FL and off front wheel wheel speed FR;
When described first wheel speed sensors and third round speed sensor all effective, and when described second wheel speed sensors is invalid, described reference speed is the aviation value of both described the near front wheel wheel speed FL and left rear wheel wheel speed RL;
When described second wheel speed sensors and third round speed sensor all effective, and when described first wheel speed sensors is invalid, described reference speed is the aviation value of both off front wheel wheel speed FR and left rear wheel wheel speed RL;
When described first wheel speed sensors is effective, and described second wheel speed sensors and third round speed sensor all invalid time, described reference speed is described the near front wheel wheel speed FL;
When described second wheel speed sensors is effective, and described first wheel speed sensors and third round speed sensor all invalid time, described reference speed is described off front wheel wheel speed FR;
When described third round speed sensor is effective, and described first wheel speed sensors and the second wheel speed sensors all invalid time, described reference speed is described left rear wheel wheel speed RL; Further,
When described first wheel speed sensors, the second wheel speed sensors and third round speed sensor is all invalid, described reference speed is 0.
In the method for calculating of above-mentioned reference speed, whether actv. determination methods is each wheel speed sensors:
Judge whether described first wheel speed sensors has output; If have, then determine that described first wheel speed sensors is effective; Otherwise determine described first wheel speed sensor failure;
Judge whether described second wheel speed sensors has output; If have, then determine that described second wheel speed sensors is effective; Otherwise determine that described second wheel speed sensors lost efficacy;
Judge whether described third round speed sensor has output; If have, then determine that described third round speed sensor is effective; Otherwise determine described third round speed sensor failure.
Structure of the present invention, feature and action effect is described in detail above according to graphic shown embodiment; the foregoing is only preferred embodiment of the present invention; but the present invention does not limit practical range with shown in drawing; every change done according to conception of the present invention; or be revised as the Equivalent embodiments of equivalent variations; do not exceed yet specification sheets with diagram contain spiritual time, all should in protection scope of the present invention.
Claims (6)
1. one kind starts and keyless access system without key, it is characterized in that: describedly to start without key and keyless access system comprises measuring wheel speed module, ABS control module, PEPS control module and electronic type and turns to lock, the safe class of described ABS control module is B level, described PEPS control module has a main control unit, and the safe class of this PEPS control module is B level; Wherein,
Described measuring wheel speed module comprises the fourth round speed sensor of the off hind wheel wheel speed for gathering automobile;
Described ABS control module is used for, by rigid line, the off hind wheel wheel speed as the speed of a motor vehicle is transferred to described PEPS control module; Further,
The ignition signal that described PEPS control module is used for when automobile is OFF, and when the described speed of a motor vehicle is less than or equal to the speed of a motor vehicle threshold value of setting, controls described electronic type and turn to lock to unlock, and turns to lock to pin steering hub column to make this electronic type;
Described without key start and keyless access system also comprise ignition control module; Further,
Described measuring wheel speed module also comprises the first wheel speed sensors of the near front wheel wheel speed for gathering automobile, for gathering the second wheel speed sensors of the off front wheel wheel speed of automobile, and for the third round speed sensor of the left rear wheel wheel speed that gathers automobile;
Described ABS control module also for going out reference speed according to described the near front wheel wheel speed, off front wheel wheel speed and left rear wheel wheel speed calculation, and for described reference speed being transferred to described ignition control module by high-speed CAN bus; Described ignition control module is used for, by low speed CAN, described reference speed is transferred to described PEPS control module;
The ignition signal that described PEPS control module is used for when automobile is OFF, and when the described speed of a motor vehicle and reference speed are less than or equal to described speed of a motor vehicle threshold value simultaneously, control described electronic type and turn to lock to unlock, and turns to lock to pin steering hub column to make this electronic type.
2. according to claim 1 without key startup and keyless access system, it is characterized in that: the speed of a motor vehicle threshold value of described setting is 4km/h.
3. according to claim 1 without key startup and keyless access system, it is characterized in that: described first wheel speed sensors, the second wheel speed sensors, third round speed sensor or fourth round speed sensor are electromagnetism or light electricity velocity sensor.
4. according to claim 1ly to start and the method for work of keyless access system without key, it is characterized in that: described method of work comprises,
Step one: the near front wheel wheel speed of described measuring wheel speed module acquires automobile, off front wheel wheel speed, left rear wheel wheel speed and off hind wheel wheel speed;
Step 2: the off hind wheel wheel speed as the speed of a motor vehicle is transferred to described PEPS control module by rigid line by described ABS control module; Meanwhile, described ABS control module goes out reference speed according to described the near front wheel wheel speed, off front wheel wheel speed and left rear wheel wheel speed calculation, and by high-speed CAN bus, described reference speed is transferred to described ignition control module; Described reference speed is transferred to described PEPS control module by low speed CAN by described ignition control module;
Step 3: the size of the speed of a motor vehicle threshold value of the more described speed of a motor vehicle and reference speed and setting respectively;
Step 4: when the ignition signal of automobile is OFF, and when the described speed of a motor vehicle and reference speed are less than or equal to described speed of a motor vehicle threshold value simultaneously, described PEPS control module controls described electronic type and turns to lock to unlock, and turns to lock to pin steering hub column to make this electronic type.
5. according to claim 4ly start and the method for work of keyless access system without key, it is characterized in that: in described step 2, the method for calculating of described reference speed comprises,
When described first wheel speed sensors, the second wheel speed sensors and third round speed sensor all effectively time, described reference speed is the aviation value of described the near front wheel wheel speed, off front wheel wheel speed and left rear wheel wheel speed three;
When described first wheel speed sensors and the second wheel speed sensors are all effective, and when described third round speed sensor is invalid, described reference speed is the aviation value of both described the near front wheel wheel speed and off front wheel wheel speed;
When described first wheel speed sensors and third round speed sensor all effective, and when described second wheel speed sensors is invalid, described reference speed is the aviation value of both described the near front wheel wheel speed and left rear wheel wheel speed;
When described second wheel speed sensors and third round speed sensor all effective, and when described first wheel speed sensors is invalid, described reference speed is the aviation value of both off front wheel wheel speed and left rear wheel wheel speed;
When described first wheel speed sensors is effective, and described second wheel speed sensors and third round speed sensor all invalid time, described reference speed is described the near front wheel wheel speed;
When described second wheel speed sensors is effective, and described first wheel speed sensors and third round speed sensor all invalid time, described reference speed is described off front wheel wheel speed;
When described third round speed sensor is effective, and described first wheel speed sensors and the second wheel speed sensors all invalid time, described reference speed is described left rear wheel wheel speed; Further,
When described first wheel speed sensors, the second wheel speed sensors and third round speed sensor is all invalid, described reference speed is 0.
6. according to claim 5ly to start and the method for work of keyless access system without key, it is characterized in that:
Judge whether described first wheel speed sensors has output; If have, then determine that described first wheel speed sensors is effective; Otherwise determine described first wheel speed sensor failure;
Judge whether described second wheel speed sensors has output; If have, then determine that described second wheel speed sensors is effective; Otherwise determine that described second wheel speed sensors lost efficacy;
Judge whether described third round speed sensor has output; If have, then determine that described third round speed sensor is effective; Otherwise determine described third round speed sensor failure.
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| CN107357178B (en) * | 2016-05-10 | 2020-04-10 | 上海海拉电子有限公司 | Control system and control method for vehicle |
| CN106938637A (en) * | 2016-12-28 | 2017-07-11 | 知豆电动汽车有限公司 | A kind of electric steering method of controlling security |
| CN107804275A (en) * | 2017-10-13 | 2018-03-16 | 法雷奥汽车内部控制（深圳）有限公司 | A kind of control method and the keyless entry of automobile are with starting safety-protection system |
| CN110397508A (en) * | 2018-04-24 | 2019-11-01 | 宝沃汽车（中国）有限公司 | Speed data collection method, apparatus and system, engine management system and vehicle |
| CN111231987A (en) * | 2020-03-28 | 2020-06-05 | 芜湖伯特利汽车安全系统股份有限公司 | Independent wheel speed processing unit for motor vehicle and control method thereof |
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