CN101885332B - Brake auxiliary control method of automobile AT transmission - Google Patents
Brake auxiliary control method of automobile AT transmission Download PDFInfo
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- CN101885332B CN101885332B CN2010102063420A CN201010206342A CN101885332B CN 101885332 B CN101885332 B CN 101885332B CN 2010102063420 A CN2010102063420 A CN 2010102063420A CN 201010206342 A CN201010206342 A CN 201010206342A CN 101885332 B CN101885332 B CN 101885332B
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Abstract
The invention relates to a brake auxiliary control method of an automobile AT transmission, which comprises the following steps: calibrating the set automobile speed lower limit value, engine rotation speed upper limit value and loosened accelerator pedal speed value in the TCU of an automobile; respectively analyzing the received loosened accelerator pedal speed signals, engine rotation speed signals, automobile speed signals, shift level position signals and brake signals by the TCU; and when the loosened accelerator pedal speed is greater than the set value, the engine rotation speed is less than the set engine rotation speed upper limit value, the automobile speed is greater than the set automobile speed lower limit value, a shift level is in a non-neutral position and a non-reverse position and a brake is trod down, outputting downshift signals by the TCU to enable the transmission to be in brake auxiliary control. By adopting the method, in the driving process, after a driver urgently loosens the accelerator and treads down a brake pedal, the engine can perform relatively obvious brake auxiliary action on the automobile and can not influence other normal gear shift functions of the automobile.
Description
Technical field
The invention belongs to automobile speed variator shift control technology field, relate to a kind of brake auxiliary control method of automobile AT transmission.
Background technology
AT (Automatic Transmission, automatic transmission with hydraulic torque converter) change-speed box emerges already, belongs to very traditional driving mechanism, and it has processing ease, drives comfortable, as to reduce driver's fatigue advantage, has become a kind of developing direction of Modern Car configuration.It is foundational development with the compound planet gear, realizes the change of transmitting ratio through the switching between sun gear, outer tooth ring and the gear framework in the compound planet gear.The automatic transmission with hydraulic torque converter system carries out the posterior infromation that shift decision need be obtained vehicle running state parameter, driver intention, road environment information and veteran chaufeur and relevant expert.Under the situation of not taking other control method, the AT change-speed box is according to the gear shift MAP collection of illustrative plates (like Fig. 1) of routine, and the chaufeur throttle that comes loose goes to touch on the brake in the process of brake pedal, will produce shift-up action or keep current gear.Yet; Chaufeur throttle go the to touch on the brake purpose of brake pedal that comes loose is for vehicle is implemented braking; Letting car retardation, when the chaufeur pine tar behind the door engine speed can drop to idling speed very soon, if produce shift-up action or keep current gear according to the conventional gear shift of AT change-speed box; Driving engine just can not play vehicle and comparatively significantly brake booster action; Vehicle braked just can only rely on brake pedal to accomplish, and this will increase the time and the distance of car brakeing undoubtedly, reduces the safety of vehicle braked effect and car brakeing.
Summary of the invention
The purpose of this invention is to provide a kind of brake auxiliary control method of automobile AT transmission; Produce the intention that makes car retardation when chaufeur; And after the throttle that comes loose steps on the drag pedal; The AT change-speed box can produce shift-down action, driving engine can be played vehicle comparatively significantly brake booster action.
Brake auxiliary control method of automobile AT transmission according to the invention is:
Set speed of a motor vehicle lower limit, said upper engine speed limit value and the pine tar door pedal speed value of automobile, and it is demarcated in the TCU of automobile (transmission control unit).
Gather pine tar door pedal speed signal through the Das Gaspedal speed sensor and pass to ECU (control unit of engine); Gather engine rotational speed signal through engine speed sensor and pass to ECU, ECU passes to TCU with pine tar door pedal speed signal and engine rotational speed signal through the CAN bus again; Gather GES through car speed sensor and pass to TCU, pass to TCU through gearshift position sensor acquisition gearshift position signal, brake switch is passed to TCU with brake signal.
TCU analyzes respectively the pine tar door pedal speed signal, engine rotational speed signal, GES, gearshift position signal and the brake signal that receive; When pine tar door pedal speed is non-neutral gear and non-reverse gear less than the said upper engine speed limit value of setting, the speed of a motor vehicle greater than speed of a motor vehicle lower limit, the gearshift position set greater than setting value, engine speed; And when the drag pedal is stepped on; TCU exports the signal that lowers category, and change-speed box gets into the braking aux. controls.
After change-speed box gets into the braking aux. controls, driving engine will play vehicle and comparatively significantly brake booster action, and it implements braking to vehicle jointly with brake.
After change-speed box gets into the braking aux. controls, if be in this state always, the accelerator open degree before appearance needs to recover immediately; When making the situation that vehicle gives it the gun (such as at the disconnected emergency situation of chaufeur erroneous judgement and anxious pine tar door and step on brake pedal after, during motoring condition before recovering immediately again), will exist vehicle to keep low-grade location and the problem that can't upgrade; For this reason; In said method, also need set the auxiliary braking distance value of automobile, and it is demarcated in the TCU of automobile; Export the signal that lowers category at TCU; After change-speed box got into the braking aux. controls, when the auxiliary braking distance reached the auxiliary braking distance value of demarcation in automobile TCU, change-speed box just withdrawed from the braking aux. controls.
Adopt method of the present invention, in chaufeur is driven process, anxious pine tar door and step on the drag pedal after; Driving engine will play vehicle and comparatively significantly brake booster action, utilize the double brake effect of Jake brake and drag, reach the purpose that vehicle is braked as early as possible; Thereby the time and the distance of car brakeing have been shortened; Improve the vehicle braked effect, strengthened the safety of car brakeing, and can not influence other normal gear shift function of vehicle.
Description of drawings
Combine accompanying drawing that the present invention is done further explain at present.
Fig. 1 is the conventional gear shift MAP figure of AT change-speed box, and wherein abscissa is represented the speed of a motor vehicle, and ordinate is represented the accelerator open degree of automobile;
Fig. 2 is the logic diagram of brake auxiliary control method of automobile AT transmission according to the invention.
The specific embodiment
As shown in Figure 2, this brake auxiliary control method of automobile AT transmission is:
Set speed of a motor vehicle lower limit, said upper engine speed limit value, pine tar door pedal speed value and the auxiliary braking distance value of automobile, and it is demarcated in the TCU of automobile.
Gather pine tar door pedal speed signal through the Das Gaspedal speed sensor and pass to ECU, gather engine rotational speed signal through engine speed sensor and pass to ECU, ECU passes to TCU with pine tar door pedal speed signal and engine rotational speed signal through the CAN bus again; Gather GES through car speed sensor and pass to TCU, pass to TCU through gearshift position sensor acquisition gearshift position signal, brake switch is passed to TCU with brake signal.
TCU analyzes respectively the pine tar door pedal speed signal, engine rotational speed signal, GES, gearshift position signal and the brake signal that receive; The pine tar door pedal speed value of pine tar door pedal speed and setting is compared; Pine tar door pedal speed is designated as 1 less than setting value, is designated as 0 more than or equal to setting value; The said upper engine speed limit value of engine speed and setting is compared, and engine speed is designated as 1 less than higher limit, is designated as 0 more than or equal to higher limit; The speed of a motor vehicle lower limit of the speed of a motor vehicle and setting is compared, and the speed of a motor vehicle is designated as 1 greater than lower limit, is designated as 0 smaller or equal to lower limit; Gearshift position is that non-neutral gear and non-reverse gear are designated as 1, for neutral gear and reverse gear are designated as 0; Step on the drag pedal and be designated as 1, the releasing of brake brake pedal is designated as 0.
The above results is carried out AND-operation; When pine tar door pedal speed is non-neutral gear and non-reverse gear less than the said upper engine speed limit value of setting, the speed of a motor vehicle greater than speed of a motor vehicle lower limit, the gearshift position set greater than setting value, engine speed, and the drag pedal obtains a result 1 when stepping on; TCU exports the signal that lowers category; Change-speed box gets into braking aux. controls (the braking ancillary control function is carried out in AND-operation result 1 expression, and this controllable function is not carried out in 0 expression, promptly normal gear shift).
At the TCU output signal that lowers category, after change-speed box got into the braking aux. controls, when the auxiliary braking distance reaches the auxiliary braking distance value of demarcation in automobile TCU (as shown in table 1), change-speed box withdrawed from the braking aux. controls.
Table 1 auxiliary braking is apart from control table
Claims (2)
1. brake auxiliary control method of automobile AT transmission is characterized in that:
Set speed of a motor vehicle lower limit, said upper engine speed limit value and the pine tar door pedal speed value of automobile, and it is demarcated in the TCU of automobile;
Gather pine tar door pedal speed signal through the Das Gaspedal speed sensor and pass to ECU, gather engine rotational speed signal through engine speed sensor and pass to ECU, ECU passes to TCU with pine tar door pedal speed signal and engine rotational speed signal through the CAN bus again; Gather GES through car speed sensor and pass to TCU, pass to TCU through gearshift position sensor acquisition gearshift position signal, brake switch is passed to TCU with brake signal;
TCU analyzes respectively the pine tar door pedal speed signal, engine rotational speed signal, GES, gearshift position signal and the brake signal that receive; When pine tar door pedal speed is non-neutral gear and non-reverse gear less than the said upper engine speed limit value of setting, the speed of a motor vehicle greater than speed of a motor vehicle lower limit, the gearshift position set greater than setting value, engine speed; And when the drag pedal is stepped on; TCU exports the signal that lowers category, and change-speed box gets into the braking aux. controls.
2. according to the said brake auxiliary control method of automobile AT transmission of claim 1; It is characterized in that: the auxiliary braking distance value of setting automobile; And it is demarcated in the TCU of automobile, at the TCU output signal that lowers category, after change-speed box gets into the braking aux. controls; When auxiliary braking distance reached the auxiliary braking distance value of demarcation in automobile TCU, change-speed box withdrawed from the braking aux. controls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102063420A CN101885332B (en) | 2010-06-22 | 2010-06-22 | Brake auxiliary control method of automobile AT transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102063420A CN101885332B (en) | 2010-06-22 | 2010-06-22 | Brake auxiliary control method of automobile AT transmission |
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| CN101885332A CN101885332A (en) | 2010-11-17 |
| CN101885332B true CN101885332B (en) | 2012-08-29 |
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| CN2010102063420A Active CN101885332B (en) | 2010-06-22 | 2010-06-22 | Brake auxiliary control method of automobile AT transmission |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102092384B (en) * | 2010-12-28 | 2014-04-02 | 奇瑞汽车股份有限公司 | Reverse protection controlling method for automatic gearbox for vehicle |
| CN102128258A (en) * | 2011-03-21 | 2011-07-20 | 重庆长安汽车股份有限公司 | AT (Automatic Transmission) gear shift control method for emergency accelerator slacking |
| CN102141138A (en) * | 2011-04-07 | 2011-08-03 | 重庆长安汽车股份有限公司 | Gear shift control method for automatic transmission (AT) under working condition of traffic congestion |
| CN102537312B (en) * | 2011-12-31 | 2015-04-01 | 重庆长安汽车股份有限公司 | Method for controlling automatic transmission to downshift after braking |
| CN102563028A (en) * | 2012-01-16 | 2012-07-11 | 重庆长安汽车股份有限公司 | Shift control method of DCT (Dual Clutch Transmission) under working condition of traffic jam |
| CN102877953B (en) * | 2012-09-26 | 2015-04-22 | 三一重工股份有限公司 | Engine speed control system and engineering machine |
| CN105650266B (en) * | 2016-01-04 | 2017-08-25 | 重庆长安汽车股份有限公司 | The brake auxiliary control method of automatic transmission |
| CN106545647B (en) * | 2016-03-07 | 2018-10-16 | 徐工集团工程机械有限公司 | A kind of engineering machinery hydraulic power velocity stages system and control method |
| CN106938643B (en) * | 2017-02-28 | 2018-08-03 | 杭州衡源汽车科技有限公司 | A kind of throttle linkage braking method and throttle linkage braking system |
| CN111660738A (en) * | 2019-03-05 | 2020-09-15 | 上汽通用五菱汽车股份有限公司 | Processing and failure judgment method for coexistence of TPMS (tire pressure monitor System) multiple vehicle speed signals |
| KR20220014945A (en) * | 2020-07-29 | 2022-02-08 | 현대모비스 주식회사 | System and method for monitering driver |
| CN112413108A (en) * | 2020-10-19 | 2021-02-26 | 东风汽车集团有限公司 | Gear shifting control method, device and system based on automatic gearbox and storage medium |
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Effective date of registration: 20231009 Address after: 401135 No. 19 Zhuoyue Road, Longxing Town, Liangjiang New Area, Yubei District, Chongqing (cluster registration) Patentee after: Chongqing Lanshan Automotive Electronics Co.,Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Patentee before: Chongqing Changan Automobile Co.,Ltd. |
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