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CN110254434A - The anti-control method slipped by slope of hybrid electric vehicle idling charging - Google Patents

The anti-control method slipped by slope of hybrid electric vehicle idling charging Download PDF

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Publication number
CN110254434A
CN110254434A CN201910461050.2A CN201910461050A CN110254434A CN 110254434 A CN110254434 A CN 110254434A CN 201910461050 A CN201910461050 A CN 201910461050A CN 110254434 A CN110254434 A CN 110254434A
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China
Prior art keywords
vehicle
idling
esp
ramp angles
slope
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Granted
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CN201910461050.2A
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Chinese (zh)
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CN110254434B (en
Inventor
王贤海
姜炜
朱建伟
冯迎霞
孔祥创
张罗亮
李通通
崔兴龙
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SAIC Motor Corp Ltd
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SAIC Motor Corp Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18Propelling the vehicle
    • B60W30/18009Propelling the vehicle related to particular drive situations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/02Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
    • B60W40/06Road conditions
    • B60W40/076Slope angle of the road
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2552/00Input parameters relating to infrastructure
    • B60W2552/15Road slope, i.e. the inclination of a road segment in the longitudinal direction

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a kind of anti-control methods slipped by slope of hybrid electric vehicle idling charging, after vehicle control device detects that vehicle enters idling mode, first detect whether idling charging entry condition meets, comprising: 1, stationary vehicle;2, power battery charged state SOC value is lower than setting maximum value;3, gearbox is in P/N grades or brake pedal is stepped on;4, engine operating state allows;5, transmission chain is opened;When full up foot, carry out the judgement of ramp angles condition: step 1: when ESP signal is effective and stationary vehicle, ESP sends longitudinal acceleration of the vehicle coefficient signal to vehicle control device, and vehicle control device calculates ramp angles θ ≈ 57.3*a, and a is longitudinal acceleration of the vehicle coefficient;Step 2: ramp angles whether≤in calibration value, if so, allowing idling to charge, if it is not, not allowing.The present invention determines whether that vehicle enters idling charge mode according to the angle in ramp where vehicle, solves the problems, such as to mix motor-car from idling charge mode be switched to mixed dynamic model formula during slip by slope.

Description

The anti-control method slipped by slope of hybrid electric vehicle idling charging
Technical field
The present invention relates to a kind of driving control methods of hybrid vehicle more particularly to a kind of hybrid electric vehicle idling to fill The anti-control method slipped by slope of electricity.
Background technique
The hybrid vehicle of the prior art can carry out idling charging to generator by engine in idling to adjust The operating point of engine is saved, to reach raising engine efficiency, achievees the purpose that reduce oil consumption.The control method of the prior art It is: depth, engine operating state and the judgement of transmission chain state that state-of-charge SOC, the pedal of system detection battery tread in The operating condition of vehicle at this time, to issue the order for entering or exiting idling charging.Attached drawing 1 is referred to, idling charging is allowed access into Decision logic be specifically: judge whether vehicle remains static;Whether brake pedal aperture is greater than into idling charging Limit value;Whether transmission chain state is opened;Whether the state-of-charge SOC of battery meets;Whether engine operating state allows.When upper When stating condition and all meeting, allows vehicle to enter idling and charge, conversely, when vehicle is unable to satisfy any one condition therein, Vehicle is then forbidden to enter idling charging.
Above-mentioned idling charge control method has certain limitation, such as when vehicle is on the road for having ramp angles, And above-mentioned condition, when all meeting, controller control vehicle enters idling charge mode, after charging complete, the dynamic mode of vehicle will The mode to be charged from idling is switched over to mixed dynamic model formula, and engine mission is at this moment needed to open clutch, move back C gear, motor It hangs low gear (L gear), during motor is also linked into low gear not successfully, the phenomenon that there are dynamical system disconnections, causes vehicle to lose dynamic Power, this process take around 2 seconds or so, may slip by slope in the meantime.
Since the control logic of the prior art lacks ramp angles calculating and judges whether ramp angles allow vehicle to enter The limitation of the mode of idling charging will lead to vehicle anti-slide when ramp angles are excessive.In order to solve this problem, some Vehicle makes up the defect of vehicle control logic, but the installation of ramp angles detection device by installation ramp angles detection device Cost is not only increased, certain requirement also is configured with to the hardware and software of associated components on vehicle.
The Chinese invention patent of Patent No. ZL201110338079.5 discloses a kind of engine auto idle speed start and stop Control method and system and device show energy-storage system voltage, speed, engine speed, car rolling state, gas brake system by detection The signal of air pressure etc., and engine is started and stopped based on above-mentioned signal-selectivity.The patent is prohibited when static using ramp Only engine misses keep the vacuum degree of brake apparatus, to prevent brake force deficiency bring from slipping by slope risk, but can not keep away Exempt from possible during powershift to slip by slope problem.
Summary of the invention
The purpose of the present invention is to provide a kind of anti-control methods slipped by slope of hybrid electric vehicle idling charging, can be according to vehicle The ramp angles in place ramp determine whether that vehicle enters idling charge mode, so that it is mixed to efficiently solve the prior art Motor-car from idling charge mode be switched to mixed dynamic model formula during slip by slope problem.
The present invention is implemented as follows:
A kind of anti-control method slipped by slope of hybrid electric vehicle idling charging, vehicle control device are detecting that vehicle enters idling After state, whether detection idling charging entry condition meets first, and idling charging entry condition includes: 1, stationary vehicle;2, it moves Power battery charge state SOC value is lower than setting maximum value;3, gearbox is in P/N grades or brake pedal is stepped on, pedal opening Greater than setting limit value;4, engine operating state allows;5, transmission chain is opened;
When above-mentioned condition all meets, the judgement of ramp angles condition is carried out;
The described ramp angles condition judgement the following steps are included:
Step 1: when ESP signal is effective and stationary vehicle, ESP sends longitudinal acceleration of the vehicle coefficient to vehicle control device Signal, vehicle control device calculate ramp angles θ according to longitudinal acceleration of the vehicle coefficient signal, and calculation formula is as follows:
θ≈57.3*a
Wherein, a is longitudinal acceleration of the vehicle coefficient, and a is calculated by ESP and is sent to vehicle control device;
Step 2:ESP judges whether ramp angles θ is less than or equal to calibration value, charges if so, vehicle is allowed to enter idling Mode, if it is not, then vehicle is not allowed to enter idling charge mode.
In the step 1, when ESP invalidating signal, ramp angles θ is defaulted as 0 °.
The ESP invalidating signal includes: that (1) ESP judges longitudinal acceleration sensor there are failures;(2) vehicle control Device is abnormal with the communication of ESP.
In the step 2, the calibration value of ramp angles is 3 °.
The present invention increases ramp angles computing function module on the basis of existing idling charging function module, and by vehicle The ramp angles in place ramp as whether allow vehicle enter idling charging logic judgment condition, when ramp angles be less than etc. When limit value, allow vehicle to enter idling in ramp and charge, when ramp angles are greater than limit value, then forbids vehicle to enter idle Fast charge mode, solve the problems, such as mixed motor-car from idling charge mode be switched to mixed dynamic model formula during slip by slope.
Detailed description of the invention
Fig. 1 is the idling charging decision logic figure of prior art hybrid vehicle.
Fig. 2 is the flow chart of the anti-control method slipped by slope of hybrid electric vehicle idling charging of the present invention;
Fig. 3 is the schematic diagram of the anti-control method slipped by slope of hybrid electric vehicle idling charging of the present invention;
Connection figure when Fig. 4 is the charging of hybrid vehicle idling.
In figure, 1 clutch, 2 engine end C shelves gears, 3 charging gears, 4 motor gears, 5 engines, 6 motors, 7 speed changes Case.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
Attached drawing 2, a kind of anti-control method slipped by slope of hybrid electric vehicle idling charging are referred to, vehicle control device is detecting After the idling charging of driver is intended to, i.e., after vehicle enters idling mode, whether need to detect idling charging entry condition first Meet, idling charging entry condition includes: 1, stationary vehicle;2, (State of Charge, means battery lotus to power battery SOC Electricity condition is also remaining capacity) value lower than setting maximum value;3, gearbox is in P/N grades or brake pedal is stepped on, and pedal is opened Degree is greater than setting limit value;4, engine operating state allows;5, transmission chain is opened.
When above-mentioned condition all meets, the judgement of ramp angles condition is carried out.The ramp angles condition judges packet Include following steps:
Step 1: when ESP (Electronic Stability Program, mean electronics body stabilization system) signal has When effect and stationary vehicle, ESP sends longitudinal acceleration of the vehicle coefficient signal to vehicle control device, and vehicle control device is vertical according to vehicle Ramp angles θ is calculated to acceleration factor signal, calculation formula is as follows:
θ≈57.3*a
Wherein, a is longitudinal acceleration of the vehicle coefficient, and the value of a is communicated by vehicle CAN after being calculated by ESP and is sent to vehicle Controller.
When ESP invalidating signal, i.e. ESP judges longitudinal acceleration sensor, and there are failure or ESP and vehicle control device When CAN communication is abnormal, ramp angles θ is defaulted as 0 °.
Attached drawing 3 is referred to, when ramp angles θ is smaller, sin θ ≈ arc length c, arc lengthVehicle acceleration is a* G,Therefore,θ ≈ 57.3*a is calculated.
Wherein, a is longitudinal acceleration of the vehicle coefficient, and g is acceleration of gravity.
Step 2:ESP judges whether ramp angles θ is less than or equal to calibration value, charges if so, vehicle is allowed to enter idling Mode, if it is not, then vehicle is not allowed to enter idling charge mode.
Preferably, the calibration value of the ramp angles be 3 °, i.e., ramp angles θ < 3 ° when, vehicle enter idling charging mould Formula;When ramp angles θ >=3 °, vehicle does not enter idling charge mode, avoids the switching of dynamic mode.Wherein, calibration value takes 3 ° of value are empirical value, and when ramp angles θ < 3 °, the response time of vehicle anti-slide is far below the response time of powershift mode, The generation slipped by slope can effectively be avoided.Calibration value can also be according to different vehicle appropriate adjustments.
Attached drawing 4 is referred to, when vehicle carries out idling charging, engine end C shelves gear 2, charging gear 3 pass through closure Clutch 1 is engaged with motor gear 4, completes the connection of engine 5 and motor 6, realizes idling charge function;Work as charging complete Afterwards, gearbox 7 moves back C gear, motor 6 hangs L/H gear, completes the switching of dynamic mode.
Embodiment: the actual test value of longitudinal acceleration of the vehicle coefficient a under different ramp angles θ is obtained by test, such as Shown in table 1.
Table 1: the value condition of longitudinal acceleration of the vehicle coefficient a under different ramp angles θ
Ramp angles θ (actual measurement) (°) Longitudinal acceleration coefficient a (actual test)
Embodiment 1 0.5 0.0087
Embodiment 2 1 0.0175
Embodiment 3 1.5 0.0262
Embodiment 4 2 0.0349
Embodiment 5 2.5 0.0436
Embodiment 6 3 0.0523
Embodiment 7 3.5 0.061
Embodiment 8 4 0.0698
According to sin θ ≈ arc length, It can be calculated θ ≈ 57.3* a。
Therefore, angle is calculated according to the ramp of 8 embodiments in formula θ ≈ 57.3*a computational chart 1, obtains table 2:
Table 2: ramp angles calculated value and its error condition while being 3 ° (take calibration value)
As shown in Table 2, when longitudinal acceleration coefficient a is 0.0087 by monitoring, by θ ≈ 57.3*a=0.4985, slope Road calculates angle for 0.4985 ° and less than 3 ° of calibration value, and car ramp is allowed to enter idling charge mode;The longitudinal acceleration system The corresponding practical ramp angles of number a are 0.5 °, and relative error is -0.00298, and error range is smaller, and control is accurate.
When longitudinal acceleration coefficient a is 0.061 by monitoring, by θ ≈ 57.3*a=3.495, ramp calculates angle and is 3.495 ° and be greater than 3 ° of calibration value, do not allow vehicle to enter idling charge mode in ramp;Longitudinal acceleration coefficient a is corresponding Practical ramp angles are 3.5 °, and relative error is -0.00134, and error range is smaller, and control is accurate.
The above is merely preferred embodiments of the present invention, it is not intended to limit the protection scope of invention, it is therefore, all at this Any modification, equivalent replacement, improvement and so within the spirit and principle of invention, should be included in protection scope of the present invention Within.

Claims (4)

1. a kind of anti-control method slipped by slope of hybrid electric vehicle idling charging, it is characterized in that: vehicle control device detection vehicle into After entering idling mode, whether detection idling charging entry condition meets first, and idling charging entry condition includes: that 1, vehicle is quiet Only;2, power battery charged state SOC value is lower than setting maximum value;3, gearbox is in P/N grades or brake pedal is stepped on, and steps on Plate aperture is greater than setting limit value;4, engine operating state allows;5, transmission chain is opened;
When above-mentioned condition all meets, the judgement of ramp angles condition is carried out;The described ramp angles condition judgement include with Lower step:
Step 1: when ESP signal is effective and stationary vehicle, ESP sends longitudinal acceleration of the vehicle coefficient letter to vehicle control device Number, vehicle control device calculates ramp angles θ according to longitudinal acceleration of the vehicle coefficient signal, and calculation formula is as follows:
θ≈57.3*a
Wherein, a is longitudinal acceleration of the vehicle coefficient, and a is calculated by ESP and is sent to vehicle control device;
Step 2:ESP judges whether ramp angles θ is less than or equal to calibration value, if so, vehicle is allowed to enter idling charge mode, If it is not, then vehicle is not allowed to enter idling charge mode.
2. the anti-control method slipped by slope of hybrid electric vehicle idling charging according to claim 1, it is characterized in that: described In step 1, when ESP invalidating signal, ramp angles θ is defaulted as 0 °.
3. the anti-control method slipped by slope of hybrid electric vehicle idling charging according to claim 2, it is characterized in that: described ESP invalidating signal includes: that (1) ESP judges longitudinal acceleration sensor there are failures;(2) communication of vehicle control device and ESP is not Normally.
4. the anti-control method slipped by slope of hybrid electric vehicle idling charging according to claim 1, it is characterized in that: described In step 2, the calibration value of ramp angles is 3 °.
CN201910461050.2A 2019-05-30 2019-05-30 Control method for preventing hybrid vehicle from sliding down slope during idle charging Active CN110254434B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113954814A (en) * 2020-07-17 2022-01-21 上海汽车集团股份有限公司 Charging control method and device for vehicle and vehicle

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US20080147259A1 (en) * 2006-12-15 2008-06-19 Yong Kak Choi Electric power generation control method during idle charge in hybrid electric vehicle
CN102803038A (en) * 2010-03-31 2012-11-28 本田技研工业株式会社 Hybrid vehicle
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