CN105857075B - Fatigue drive of car security protection system and method - Google Patents

Fatigue drive of car security protection system and method Download PDF

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Publication number
CN105857075B
CN105857075B CN201610310447.8A CN201610310447A CN105857075B CN 105857075 B CN105857075 B CN 105857075B CN 201610310447 A CN201610310447 A CN 201610310447A CN 105857075 B CN105857075 B CN 105857075B
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China
Prior art keywords
fatigue
open degree
accelerator open
lim
limit value
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CN201610310447.8A
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Chinese (zh)
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CN105857075A (en
Inventor
秦龙
黄永逸
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东风汽车公司
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Priority to CN201610310447.8A priority Critical patent/CN105857075B/en
Publication of CN105857075A publication Critical patent/CN105857075A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/02Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
    • B60K28/06Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K26/00Arrangements or mounting of propulsion unit control devices in vehicles
    • B60K26/02Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/02Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
    • B60K28/06Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
    • B60K28/063Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver preventing starting of vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/02Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
    • B60K28/06Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
    • B60K28/066Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver actuating a signalling device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00Brake-action initiating means
    • B60T7/12Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/14Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger operated upon collapse of driver
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/02Active or adaptive cruise control system; Distance control

Abstract

The present invention relates to technical field of automotive electronics, more particularly to fatigue drive of car security protection system and method, including driver fatigue monitor system, system switching input unit, accelerator opening amount signal unit, engine rotational speed signal unit, speed signal unit, system controller, engine controller, FP Fuel Pump Relay unit and electronic stabilizing control system;System controller carries out level of fatigue judgement according to the various signals of input, and exports command adapted thereto to engine controller, FP Fuel Pump Relay unit and electronic stabilizing control system according to level of fatigue.According to identify driver fatigue intensity limitation engine throttle opening, whether oil-break, whether brake, make driver can be in slight fatigue, in not oil-break and under limiting accelerator open degree, safe speed is driven, and effectively avoids causing traffic accident because of mis-accelerator pressing;Oil-break and emergency brake are carried out when fatigue strength is excessive simultaneously, is ensured personal safety.

Description

Fatigue drive of car security protection system and method
Technical field
The present invention relates to technical field of automotive electronics, and in particular to fatigue drive of car security protection system and method.
Background technique
Motor vehicle travels for a long time, and driver is easy to generate feeling of fatigue, and especially present operating pressure is big, when fatigue driving Driver is slow in reacting, is difficult to handle it in time when there is emergency.In addition, some large-sized trucks due to inertia compared with Greatly, braking distance is too long, it is easier to traffic accident occurs.According to investigation, China's road traffic accident is in rising trend always, Wherein the traffic accident as caused by fatigue driving account for traffic accident specific gravity it is very big.Therefore, a kind of method is invented to avoid tired Please safety accident caused by sailing is necessary.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of automobile for helping to reduce traffic accidents by fatigue driving is tired Please security protection system and method are sailed.
Fatigue drive of car security protection system a kind of for the present invention, technical solution are, comprising: fatigue driving early warning System, system switching input unit, accelerator opening amount signal unit, engine rotational speed signal unit, speed signal unit, system control Device, engine controller, FP Fuel Pump Relay unit and electronic stabilizing control system processed;
The driver fatigue monitor system exports driver fatigue intensity S, system switching input unit exports enable signal, Accelerator opening amount signal unit exports accelerator open degree P, engine rotational speed signal unit output engine revolving speed n, speed signal unit Speed v being exported to system controller, the system controller carries out level of fatigue judgement according to the various signals of input, and according to Level of fatigue exports command adapted thereto to engine controller, FP Fuel Pump Relay unit and electronic stabilizing control system.
It further, further include video and music entertainment system host and car body controller, the video and music entertainment system host is used for The interior voice prompting signal that system controller is sent is received, the car body controller is used to receive the vehicle of system controller transmission Body is double to dodge alarm signal.
Further, the system controller and driver fatigue monitor system, system switching input unit, accelerator open degree are believed Number unit, engine rotational speed signal unit, speed signal unit, video and music entertainment system host, car body controller and electronic stability Pass through CAN communication between control system.
Fatigue drive of car safety protecting method a kind of for the present invention, technical solution are that it is strong to receive driver fatigue Signal is spent, level of fatigue is judged according to driver fatigue intensity, and corresponding actions are exported according to level of fatigue:
When being judged as no fatigue driving, request accelerator open degree P as output accelerator open degree driver;
When being judged as slight fatigue driving, if driver requests accelerator open degree P to be no more than accelerator open degree limit value Plim, then Request accelerator open degree P as output accelerator open degree driver;If it is more than accelerator open degree limit value that driver, which requests accelerator open degree P, Plim, then by accelerator open degree limit value PlimAs output accelerator open degree;
When being judged as moderate fatigue driving, output accelerator open degree is 0;
When being judged as severe fatigue driving, output accelerator open degree is 0, and carries out oil-break and emergency brake.
Further, the level of fatigue is according to specific fatigue strength SNJudged:
As 0≤SN≤ a, for no fatigue driving;
As a < SN≤ b is slight fatigue driving;
As b < SN≤ c is moderate fatigue driving;
As c < SN≤ 1, it is severe fatigue driving;
The specific fatigue strength SNFor driver fatigue intensity S normalized resulting value, numerical value a, b, c difference For slight fatigue driving, moderate fatigue driving, severe fatigue driving threshold value.
Further, when slight fatigue driving, the accelerator open degree limit value PlimCalculating process it is as follows:
The method tabled look-up using calibration, according to specific fatigue strength SNIt is worth go out corresponding initial accelerator open degree limit value P (SN)lim
Calculate the speed considerations factor f of engine speed n1(n), describedThe PlimIt (n) is difference Safe accelerator aperture limit value under engine speed, is obtained by Experimental Calibration;
Calculate the speed compensation factor f of speed v2(v), describedThe Plim(v) under different speeds Safe accelerator aperture limit value, obtained by Experimental Calibration;
The accelerator open degree limit value Plim=P (SN)lim×f1(n)×f2(v)。
Further, work as x1< SN< x2When, the initial accelerator open degree limit value P (SN)limIt is calculated by linear interpolation It arrives, i.e.,F (the x1) and f (x2) it is specific fatigue strength SNX is taken respectively1And x2 When corresponding initial accelerator open degree limit value.
Further, it when the slight fatigue driving, sends interior voice prompting signal prompt driver and is in slight tired Labor driving condition.
Further, it when the moderate fatigue driving, sends interior voice prompting signal prompt driver and is sailed in danger State.
Further, it when the severe fatigue driving, sends interior voice prompting signal prompt driver and is sailed in danger State sends the double sudden strain of a muscle alarm signals of vehicle body, while controlling vehicle oil-break, and carry out emergency brake.
Beneficial effects of the present invention: according to the driver fatigue intensity limitation engine throttle opening identified, whether break Whether oil brakes, and makes driver can be in slight fatigue, safe speed is driven in not oil-break and under limiting accelerator open degree It sails, effectively avoids causing traffic accident because of mis-accelerator pressing;Oil-break and urgent brake are carried out when fatigue strength is excessive simultaneously Vehicle ensures personal safety.And since by slight fatigue and moderate fatigue lower limit accelerator open degree, engine system can break Oil, combustion torque reduce, and engine speed can be restored to idle conditions, and speed can similarly be reduced to vehicle stabilization traveling most Small speed, the emergency brake under severe fatigue, not will lead to vehicle rollover etc. and endangers personal safety.
Detailed description of the invention
Fig. 1 is a kind of connection schematic diagram of fatigue drive of car security protection system of the present invention;
Fig. 2 is a kind of control flow chart of fatigue drive of car safety protecting method of the present invention;
Accelerator open degree limit value P when Fig. 3 is slight fatigue driving of the inventionlimCalculating process;
In figure:
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, a kind of fatigue drive of car security protection system, including driver fatigue monitor system 1, system switching Input unit 2, accelerator opening amount signal unit 3, engine rotational speed signal unit 4, speed signal unit 5, system control (ECU) 6, Engine controller (EMS) 7, video and music entertainment system host 8, car body controller (BCM) 9, FP Fuel Pump Relay unit 10, brake letter Number and electronic stabilizing control system (ESC) 11.Driver fatigue monitor system 1, system switching input unit 2, accelerator opening amount signal Unit 3, engine rotational speed signal unit 4 and speed signal unit 5 are communicated by CAN line with system controller 6, system control 6 It is communicated by CAN line with engine controller 7, system controller 6 exports oil-break signal and sends oil-feed pump relay by rigid line Device unit 10, system controller 6 export interior voice prompting signal and are communicated by CAN line with video and music entertainment system host 8, are System controller 6 exports the double sudden strain of a muscle alarm signals of vehicle body and is communicated by CAN line with car body controller 9, the output brake of system controller 6 Signal is communicated by CAN line with electronic stabilizing control system 11.
It is illustrated in figure 2 a kind of control flow chart of fatigue drive of car safety protecting method, specifically combines following implementation Example is illustrated:
System switching input unit 2 controls the starting and closing of the system, and it is tired that driver fatigue monitor system 1 exports driver Labor intensity S, and exported by CAN line to system control 6, wherein the calculation of the person's of sailing fatigue strength S is the prior art.
After system switching input unit 2 controls system starting, it is strong that driver fatigue monitor system 1 exports driver fatigue Degree S, 3 output engine revolving speed n of engine rotational speed signal unit and speed signal unit 4 export speed v to system control 6. The driver fatigue intensity S received is normalized for system control 6, obtains SN, i.e. 0≤SN≤1.And it will normalization Fatigue driving intensity S afterwardsNFour grades are determined according to intensity limit value is driven: tired without fatigue driving, slight fatigue driving, moderate Please it sails and severe fatigue driving.Judgment basis are as follows: as 0≤SN≤ 0.05, for no fatigue driving;As 0.05 < SN≤ 0.5, be Slight fatigue driving;As 0.5 < SN≤ 0.8, it is moderate fatigue driving;As 0.8 < SN≤ 1, it is severe fatigue driving.Wherein, 0.05,0.5,0.8 respectively slight fatigue driving, moderate fatigue driving, severe fatigue driving threshold value, can be according to the actual situation It is demarcated.
(1) when being determined as no fatigue driving, which maintains driver intention without any operation, i.e. accelerator open degree limits Value PlimAccelerator open degree P, P are requested equal to driverlim=P.
(2) when being determined as slight fatigue driving, according to specific fatigue strength SN, engine speed n and speed v come it is different Degree limits accelerator open degree Plim
In embodiment provided by the invention, first according to fatigue strength SNCalculate initial accelerator open degree limit value P (SN)lim。 Work as SNWhen=[0.05,0.1,0.15,0.2,0,25,0.3,0.35,0.4,0.45,0.5], initial accelerator open degree limit value P (SN)lim =[60%, 56%, 52%, 46%, 40%, 30%, 18%, 8%, 6%, 5%], the value are worked as by demarcating acquisition of tabling look-up SNWhen=0.1, P (SN)lim=56%;Work as SNWhen=0.15, P (SN)lim=52%, and so on.Work as x1< SN< x2When, initially Accelerator open degree limit value P (SN)limIt is calculated by linear interpolation, i.e.,f(x1) and f(x2) it is specific fatigue strength SNX is taken respectively1And x2When corresponding initial accelerator open degree limit value.Such as 0.1 < SNWhen < 0.15, HaveThat is P (SN)lim=52%+ (0.15-SN) × 80%.And so on, it obtains The initial accelerator open degree limit value P (S of other segmentsN)lim.System controller 6 is according to engine speed n and speed v to initial oil Door aperture limit value compensates, and obtains final accelerator open degree limit value Plim, its calculation formula is: Plim=P (SN)lim×f1(n) ×f2(v)。
Wherein, f1(n) the speed considerations factor for being engine speed n;f2(v) the speed compensation factor for being speed v.Pass through Test acquisition is constant in speed and engine speed changes, and multiple groups test is carried out under different engine, and test calibration goes out Safe accelerator aperture limit value P under different rotating speedslim(n), the speed considerations factor is finally obtained.I.e. as engine speed n=n0 When, speed considerations factor f1(n0) have:
The speed considerations factor f under all engine speed is obtained by this method1(n)。
Similarly, test acquisition is constant in engine speed and speed changes, and multiple groups test, test are carried out under different speeds Calibrate the safe accelerator aperture limit value P under different speedslim(v), the speed considerations factor is finally obtained.I.e. as speed v=v0 When, speed considerations factor f2(v0) have:
The speed considerations factor f under all speeds is obtained by this method2(v)。
As shown in figure 3, system control block figure when being slight fatigue driving.
The throttle commands of the accelerator open degree value P received are sent to engine control by CAN line by system controller ECU6 Device 7 processed: if driver requests accelerator open degree value P to be less than Plim, then the person's of sailing request accelerator open degree value P is sent to by CAN line starts Machine controller 7;If driver requests accelerator open degree value P to be greater than or equal to Plim, then by accelerator open degree limit value PlimThrottle commands Accelerator open degree value P is requested to be sent to engine controller 7 by CAN line instead of driver.Meanwhile system controller ECU6 is sent Interior voice prompting signal, and video and music entertainment system host 8 is sent to by CAN line, by voice reminder, driver has been in Slight fatigue driving state.
(3) when being determined as moderate fatigue driving, limit value accelerator open degree is 0, i.e. Plim=0, gas pedal does not act as at this time With that is, the instruction of accelerator open degree value 0 is sent to instead of driver's request accelerator open degree value P by CAN line and is started by system controller 6 Machine controller 9.Meanwhile system controller 6 sends interior voice prompting signal, and is sent to video and music entertainment system by CAN line Host 8, by voice reminder, driver has been in dangerous driving state.
(4) when being determined as severe fatigue driving, accelerator open degree value 0 is sent to hair by CAN line by system controller 6 Motivation controller 7, i.e. Plim=0, oil-break instruction, system oil-break are sent to FP Fuel Pump Relay unit 10;Simultaneously and pass through CAN line Brake instruction is started into electron stabilizing control system 11, vehicle emergency brake;Meanwhile system controller 6 sends interior voice Standby signal, and video and music entertainment system host 8 is sent to by CAN line, by voice reminder, driver has been in dangerous driving State.In addition, system controller 6 is sent, vehicle body is double to dodge alarm signal, and is sent to car body controller 11 by CAN line, realizes Car light is double to dodge alarm.
Due to by slight fatigue and moderate fatigue lower limit accelerator open degree, engine system meeting oil-break, combustion torque It reducing, engine speed can be restored to idle conditions, and speed can similarly be reduced to the minimum speed of vehicle stabilization traveling, 10km/h or so, the emergency brake under severe fatigue, not will lead to vehicle rollover etc. and endangers personal safety.
The above description is merely a specific embodiment, it is noted that anyone skilled in the art exists Disclosed herein technical scope in, any changes or substitutions that can be easily thought of, should all cover protection scope of the present invention it It is interior.

Claims (9)

1. a kind of fatigue drive of car security protection system, it is characterised in that: opened including driver fatigue monitor system (1), system Close input unit (2), accelerator opening amount signal unit (3), engine rotational speed signal unit (4), speed signal unit (5), system Controller (6), engine controller (7), FP Fuel Pump Relay unit (10) and electronic stabilizing control system (11);
Driver fatigue monitor system (1) the output driver fatigue intensity S, the enabled letter of system switching input unit (2) output Number, accelerator opening amount signal unit (3) export accelerator open degree P, engine rotational speed signal unit (4) output engine revolving speed n, speed Signal element (5) exports speed v to system controller (6), and the system controller (6) carries out tired according to the various signals of input The judgement of labor grade, and command adapted thereto is exported to engine controller (7), FP Fuel Pump Relay unit (10) and electricity according to level of fatigue Sub- stabilizing control system (11);
The level of fatigue includes no fatigue driving, slight fatigue driving, moderate fatigue driving and severe fatigue driving;
When the level of fatigue is slight fatigue driving, if driver requests accelerator open degree P to be no more than accelerator open degree limit value Plim, then driver is requested accelerator open degree P as output accelerator open degree by system controller (6);If driver requests accelerator open degree P is more than accelerator open degree limit value Plim, then system controller (6) is by accelerator open degree limit value PlimAs output accelerator open degree;
Wherein, accelerator open degree limit value PlimCalculating process it is as follows:
The method tabled look-up using calibration, according to specific fatigue strength SNIt is worth go out corresponding initial accelerator open degree limit value P (SN)lim
Calculate the speed considerations factor f of engine speed n1(n), describedThe Plim(n) start for difference Safe accelerator aperture limit value under machine revolving speed, is obtained by Experimental Calibration;
Calculate the speed compensation factor f of speed v2(v), describedThe PlimIt (v) is the peace under different speeds Full throttle aperture limit value, is obtained by Experimental Calibration;
The accelerator open degree limit value Plim=P (SN)lim×f1(n)×f2(v)。
2. fatigue drive of car security protection system as described in claim 1, it is characterised in that: further include video and music entertainment system Host (8) and car body controller (9), video and music entertainment system (8) host are used to receive the car of system controller (6) transmission Voice prompting signal, the car body controller (9) are used to receive the double sudden strain of a muscle alarm signals of vehicle body of system controller (6) transmission.
3. fatigue drive of car security protection system as claimed in claim 2, it is characterised in that: the system controller (6) With driver fatigue monitor system (1), system switching input unit (2), accelerator opening amount signal unit (3), engine rotational speed signal Unit (4), speed signal unit (5), video and music entertainment system host (8), car body controller (9) and electronic stabilizing control system (11) pass through CAN communication between.
4. a kind of fatigue drive of car safety protecting method, which is characterized in that driver fatigue strength signal is received, according to driving Member's fatigue strength judges level of fatigue, and exports corresponding actions according to level of fatigue:
When being judged as no fatigue driving, request accelerator open degree P as output accelerator open degree driver;
When being judged as slight fatigue driving, if driver requests accelerator open degree P to be no more than accelerator open degree limit value Plim, then will drive The person of sailing requests accelerator open degree P as output accelerator open degree;If it is more than accelerator open degree limit value P that driver, which requests accelerator open degree P,lim, then By accelerator open degree limit value PlimAs output accelerator open degree;
When being judged as moderate fatigue driving, output accelerator open degree is 0;
When being judged as severe fatigue driving, output accelerator open degree is 0, and carries out oil-break and emergency brake;
The accelerator open degree limit value PlimCalculating process it is as follows:
The method tabled look-up using calibration, according to specific fatigue strength SNIt is worth go out corresponding initial accelerator open degree limit value P (SN)lim
Calculate the speed considerations factor f of engine speed n1(n), describedThe Plim(n) start for difference Safe accelerator aperture limit value under machine revolving speed, is obtained by Experimental Calibration;
Calculate the speed compensation factor f of speed v2(v), describedThe PlimIt (v) is the peace under different speeds Full throttle aperture limit value, is obtained by Experimental Calibration;
The accelerator open degree limit value Plim=P (SN)lim×f1(n)×f2(v)。
5. fatigue drive of car safety protecting method as claimed in claim 4, which is characterized in that the level of fatigue is according to tool Body fatigue strength SNJudged:
As 0≤SN≤ a, for no fatigue driving;
As a < SN≤ b is slight fatigue driving;
As b < SN≤ c is moderate fatigue driving;
As c < SN≤ 1, it is severe fatigue driving;
The specific fatigue strength SNFor driver fatigue intensity S normalized resulting value, described numerical value a, b, c are respectively light Spend fatigue driving, moderate fatigue driving, severe fatigue driving threshold value.
6. fatigue drive of car safety protecting method as claimed in claim 5, which is characterized in that work as x1< SN< x2When, it is described Initial accelerator open degree limit value P (SN)limIt is calculated by linear interpolation, i.e.,Institute State f (x1) and f (x2) it is specific fatigue strength SNX is taken respectively1And x2When corresponding initial accelerator open degree limit value.
7. fatigue drive of car safety protecting method as claimed in claim 4, it is characterised in that: the slight fatigue driving When, it sends interior voice prompting signal prompt driver and is in slight fatigue driving state.
8. fatigue drive of car safety protecting method as claimed in claim 4, which is characterized in that the moderate fatigue driving When, the interior voice prompting signal prompt driver of transmission is in danger and sails state.
9. fatigue drive of car safety protecting method as claimed in claim 4, which is characterized in that the severe fatigue driving When, the interior voice prompting signal prompt driver of transmission is in danger and sails state, sends the double sudden strain of a muscle alarm signals of vehicle body, controls simultaneously Vehicle oil-break, and carry out emergency brake.
CN201610310447.8A 2016-05-11 2016-05-11 Fatigue drive of car security protection system and method CN105857075B (en)

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CN108263359A (en) * 2016-12-29 2018-07-10 博世汽车部件(苏州)有限公司 The system and method for preventing vehicle from accidentally accelerating
CN108045227A (en) * 2018-01-15 2018-05-18 陈世辉 A kind of intelligent early-warning method for driving safety
CN110254229A (en) * 2019-07-23 2019-09-20 杨庆奎 A kind of safe driving method and device of drunk-driving prevention and fatigue driving

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