CN104697790A - Test measuring method for critical P-gear parking automobile speed of automobile automatic gearbox - Google Patents
Test measuring method for critical P-gear parking automobile speed of automobile automatic gearbox Download PDFInfo
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- CN104697790A CN104697790A CN201510157527.XA CN201510157527A CN104697790A CN 104697790 A CN104697790 A CN 104697790A CN 201510157527 A CN201510157527 A CN 201510157527A CN 104697790 A CN104697790 A CN 104697790A
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Abstract
The invention discloses a test measuring method for the critical P-gear parking automobile speed of an automobile automatic gearbox. According to the method, a computer regulates the speed of a driving motor to a set rotating speed, and an electrical inertia simulation control model is started; the computer collects the rotating speed of an axle shaft of the automatic gearbox to be measured in real time and obtains the preset rotating speed value of the driving motor at the next moment through calculation, and meanwhile the computer sends the preset rotating speed value to the driving motor in real time, and sequential circulation control is performed; when the rotating speed of the axle shaft meets the requirement for P-gear parking, a tester manually operates a gear shifting device to park at the P gear, and when the computer measures that the rotating speed of the axle shaft is zero, the driving motor is controlled to stop, and one time of testing is ended. The critical P-gear parking automobile speed can be accurately measured through simulating the whole test working conditions of the automobile gearbox, and the accurate and reliable support is provided for test research performed on the critical P-gear parking automobile speed of the automobile gearbox.
Description
Technical field
The invention belongs to car test techniqes field, particularly relate to automatic transmission P in automobile dynamic system and keep off parking performance test measuring method, more particularly, the present invention relates to a kind of automatic gearbox P and keep off parking critical income speed of a motor vehicle test measuring method.
Background technology
Along with the development of vehicle transmission technology, automatic transmission, due to features such as its processing ease, driving comfort, smooth gear shifting, has become an important development direction of automotive transmission.P keeps off the important component part of halting mechanism as automatic transmission, P keeps off parking and is made up of spreadet spreadet wheel, lock pin ratchet and a set of control device, spreadet spreadet wheel is connected with transmission output shaft under normal circumstances, and lock pin ratchet and control device are fixed on case of transmission.When automatic transmission is not linked into P gear, control device controls lock pin ratchet and spreadet spreadet wheel and is in released state, and spreadet spreadet wheel can rotate arbitrarily along with transmission output shaft; When automatic transmission is linked into P gear, control device makes lock pin ratchet be combined with spreadet spreadet wheel, thus make together with transmission output shaft is locked at case of transmission rigidity, realizes long-time stable with the automobile guaranteeing to carry automatic transmission and park, avoid slipping car phenomenon.But, P can be realized smoothly in order to ensure automatic transmission under low speed of a motor vehicle limiting condition condition and keep off parking, often need to keep off the test that parking function carries out the critical income speed of a motor vehicle, to verify correctness and the reliability of its design parameter to automatic transmission P newly developed.
At present, test automatic gearbox P being kept off to the critical income speed of a motor vehicle of parking mainly adopts car load working condition tests method, test condition is not only subject to the restriction of automobile research progress, and test figure is repeated and reliability is poor, and cannot realize in the automatic transmission model machine development phase test and validation that P keeps off parking performance, test poor in timeliness.Therefore, how to simulate automatic transmission complete vehicle test operating mode on stand under, the critical income speed of a motor vehicle of parking is kept off to its P and carry out test measurement, also there is no the report of correlation test measuring method at present both at home and abroad.Therefore, need a kind of automatic gearbox P of design badly and keep off parking critical income speed of a motor vehicle test measuring method, the P that can realize under accurate simulation automatic transmission complete vehicle test operating mode keeps off the critical income speed of a motor vehicle test of parking, and this is significant for the shortening automatic transmission construction cycle.
Summary of the invention
For the deficiencies in the prior art, a kind of automatic gearbox P is the object of the present invention is to provide to keep off parking critical income speed of a motor vehicle test measuring method, under simulation automatic transmission complete vehicle test operating mode, the critical income speed of a motor vehicle of parking can be kept off to its P and carry out Measurement accuracy, thus improve reliability and the accuracy that automatic transmission P keeps off the test of the parking critical income speed of a motor vehicle, and provide powerful support for the experimental study of the critical income speed of a motor vehicle of automatic transmission P gear parking.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of automatic gearbox P keeps off parking critical income speed of a motor vehicle test measuring method, it is characterized in that:
1) automatic transmission to be measured being installed locator meams according to real vehicle is fixed on test measurement mechanism;
2) according to the spatial relation of the relative automatic transmission of selector on real vehicle, selector is mounted on test measurement mechanism, and gear-shifting inhaul cable is kept off halting mechanism with selector with the P of automatic transmission to be measured according to real vehicle connected mode is connected;
3) computing machine according to testing requirements by drive motor speed governing to setting speed, and start electric inertia simulation Controlling model; The rotating speed of computer real-time acquisition automatic transmission semiaxis, and the semiaxis rotary speed data input electric inertia simulation Controlling model that will record, the given rotating speed value of subsequent time drive motor is calculated by electric inertia simulation Controlling model, given rotating speed value is sent to electric machine controller by simultaneous computer in real time, electric machine controller in time by drive motor rotational speed regulation to given rotating speed, cycle control successively, thus accurate simulation goes out the rotating speed of semiaxis under car load neutral low speed slide operating mode on test measurement mechanism; When the rotating speed of semiaxis reach income P gear require time, computing machine controls audible-visual annunciator prompting testing crew; Testing crew manual control selector income P keeps off, and when the rotating speed that computing machine records semiaxis is zero, computing machine stops the operation of electric inertia simulation Controlling model automatically, and sending controling instruction stops to motor controller controls drive motor, and single test terminates;
4) obtain by Computer Analysis the semiaxis rotating speed that semiaxis rotating speed sports for upper a moment of zero, and this semiaxis rotating speed is converted into the corresponding speed of a motor vehicle, be automatic transmission P to be measured and keep off the critical income speed of a motor vehicle of parking.
Compared with prior art, tool of the present invention has the following advantages:
1. the present invention tests measuring method and realizes simple, and principle of work is reliable, can fast, reliable measurements goes out the critical income speed of a motor vehicle of automatic transmission P gear parking.
2. the present invention tests the bench simulation that measuring method employing electric inertia simulation control technology realizes car load neutral low speed slide operating mode, Work condition analogue precision is high, highly versatile, only need during test to arrange car load correlation parameter in a computer, can record with critical income speed of a motor vehicle during a automatic transmission coupling different automobile types, for the car load coupling of automatic transmission provides authentic experiments foundation.
3. the present invention tests measuring method and can record the torque and rotational speed Changing Pattern that automatic transmission P keeps off semiaxis in parking process simultaneously, thus the reliability design keeping off halting mechanism for automatic transmission P provides more how available test figure.
Accompanying drawing explanation
Fig. 1 is that automatic transmission P keeps off parking critical income speed of a motor vehicle experimental control method schematic diagram.
Fig. 2 is that automatic transmission P keeps off parking critical income speed of a motor vehicle controlling test process flow diagram.
Fig. 3 is that automatic transmission P keeps off parking critical income speed of a motor vehicle test measuring principle figure.
Fig. 4 is that automatic transmission P keeps off parking critical income speed of a motor vehicle test measurement mechanism structural drawing.
In accompanying drawing 4: 1-iron ground; 2-variator installing base frame; 3-automatic transmission to be measured; 4-semiaxis; 5-torque rotary speed sensor; 6-sensor base; 7-drive motor; 8-motor base; 9-electric machine controller; 10-computing machine; 11-data acquisition unit; 12-audible-visual annunciator; 13-selector base; 14-selector; 15-gear-shifting inhaul cable.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment: automatic transmission P provided by the invention keeps off the test measurement mechanism of parking critical income speed of a motor vehicle test needed for measuring method as shown in Figure 4, specifically comprises iron ground 1, variator installing base frame 2, automatic transmission to be measured 3, semiaxis 4, torque rotary speed sensor 5, sensor base 6, drive motor 7, motor base 8, electric machine controller 9, computing machine 10, data acquisition unit 11, audible-visual annunciator 12, selector base 13, selector 14 and gear-shifting inhaul cable 15.Described variator installing base frame 2 is rigidly fixed on iron ground 1 by bolt, and described automatic transmission 3 to be measured is arranged on variator installing base frame 2 side by bolt rigidity.Described torque rotary speed sensor 5 is rigidly fixed in sensor base 6, sensor base 6 is rigidly fixed on iron ground 1 by bolt, torque rotary speed sensor 5 side projecting shaft is connected with semiaxis 4 one end, torque rotary speed sensor 5 opposite side projecting shaft is connected with motor output shaft by shaft coupling, for directly measuring rotating speed and the torque of automatic transmission semiaxis 4; Described drive motor 7 is fixed on iron ground 1 by motor base 8; Utilize drive motor 7 to drag semiaxis 4 to rotate, and then the P dragging automatic transmission 3 to be measured keeps off parking lock pinion rotation, to simulate automatic transmission output speed under car load neutral low speed slide operating mode.Utilize the rotating speed of automatic transmission semiaxis 4 in data acquisition unit 11 pairs of processs of the test and dtc signal to carry out Real-time Collection, and import computing machine 10 in real time into and preserve in real time, process and show, test measuring principle as shown in Figure 3.
See Fig. 1, Fig. 2, a kind of automatic gearbox P keeps off parking critical income speed of a motor vehicle test measuring method, comprises the steps:
1) automatic transmission 3 to be measured being installed locator meams according to real vehicle is fixed on test measurement mechanism; Corresponding torque rotary speed sensor 5, drive motor 7, electric machine controller 9 and data acquisition unit 11 is selected according to automatic transmission design parameter.
2) according to the spatial relation of the relative automatic transmission of selector on real vehicle 14, selector 14 is mounted on test measurement mechanism, and gear-shifting inhaul cable 15 is kept off halting mechanism with selector 14 with the P of automatic transmission 3 to be measured according to real vehicle connected mode is connected; And adjust position and reach fixing after testing requirements.
3) computing machine 10 controls drive motor 7 duty by electric machine controller 9, during on-test, computing machine 10 according to testing requirements by drive motor 7 speed governing to setting speed, and start electric inertia simulation Controlling model.In process of the test, the rotating speed of computing machine 10 Real-time Collection automatic transmission semiaxis 4, and the semiaxis 4 rotary speed data input electric inertia simulation Controlling model that will record, calculate the given rotating speed value of subsequent time drive motor 7 by electric inertia simulation Controlling model; Simultaneously, computing machine 10 imports given rotating speed value into electric machine controller 9 in real time by communication modes, electric machine controller 9 regulates the rotating speed of drive motor 7 to given rotating speed value in real time, cycle control successively, just can test the Changing Pattern of semiaxis 4 rotating speed under accurate simulation car load neutral low speed slide operating mode on measurement mechanism, control principle as shown in Figure 1.When the rotating speed of semiaxis 4 reach income P gear require time, computing machine 10 controls audible-visual annunciator 12 and points out testing crew; Then testing crew manual control selector 14 income P keeps off, and when the rotating speed that computing machine 10 records semiaxis 4 is zero, computing machine 10 stops electric inertia simulation Controlling model to run, and sending controling instruction controls motor stopping to electric machine controller 9, and single test terminates.
4) semiaxis 4 rotary speed data is converted into the speed of a motor vehicle according to formula (1) by process of the test Computer 10 in real time, obtaining by analyzing the rotary speed data of semiaxis 4 the conversion speed of a motor vehicle of upper a moment corresponding to semiaxis 4 rotating speed that semiaxis 4 rotating speed sports zero, being automatic transmission 3P to be measured and keeping off the critical income speed of a motor vehicle of parking.
（1）
In formula,
for the speed of a motor vehicle (unit km/h),
for rotating speed (unit r/min),
for radius of wheel (unit m).
Described electric inertia simulation Controlling model, as shown in Equation (2):
（2）
In formula,
for driving moment, during car load neutral position sliding operating mode
;
for rolling resistance moment;
for air resistance square;
for grade resistance square, by the setting of grade resistance square, under can simulating different road conditions condition, P keeps off the critical income speed of a motor vehicle test of parking;
for acceleration resistance square
The automatic transmission P utilizing test measuring method of the present invention to obtain keeps off the critical income vehicle speed data of parking accurately and reliably, and omnidistancely can record the torque and rotational speed Changing Pattern of automatic transmission P gear parking process of the test, measurement result of the present invention keeps off the great significance for design of halting mechanism to optimizing automatic transmission P.
Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention but not restriction technologies scheme, those of ordinary skill in the art is to be understood that, those are modified to technical scheme of the present invention or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present invention.
Claims (1)
1. automatic gearbox P keeps off a parking critical income speed of a motor vehicle test measuring method, it is characterized in that:
1) automatic transmission to be measured being installed locator meams according to real vehicle is fixed on test measurement mechanism;
2) according to the spatial relation of the relative automatic transmission of selector on real vehicle, selector is mounted on test measurement mechanism, and gear-shifting inhaul cable is kept off halting mechanism with selector with the P of automatic transmission to be measured according to real vehicle connected mode is connected;
3) computing machine according to testing requirements by drive motor speed governing to setting speed, and start electric inertia simulation Controlling model; The rotating speed of computer real-time acquisition automatic transmission semiaxis, and the semiaxis rotary speed data input electric inertia simulation Controlling model that will record, the given rotating speed value of subsequent time drive motor is calculated by electric inertia simulation Controlling model, given rotating speed value is sent to electric machine controller by simultaneous computer in real time, electric machine controller in time by drive motor rotational speed regulation to given rotating speed, cycle control successively, thus accurate simulation goes out the rotating speed of semiaxis under car load neutral low speed slide operating mode on test measurement mechanism; When the rotating speed of semiaxis reach income P gear require time, computing machine controls audible-visual annunciator prompting testing crew; Testing crew manual control selector income P keeps off, and when the rotating speed that computing machine records semiaxis is zero, computing machine stops the operation of electric inertia simulation Controlling model automatically, and sending controling instruction stops to motor controller controls drive motor, and single test terminates;
4) obtain by Computer Analysis the semiaxis rotating speed that semiaxis rotating speed sports for upper a moment of zero, and this semiaxis rotating speed is converted into the corresponding speed of a motor vehicle, be automatic transmission P to be measured and keep off the critical income speed of a motor vehicle of parking.
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| CN201510157527.XA CN104697790B (en) | 2015-04-03 | 2015-04-03 | Test measuring method for critical P-gear parking automobile speed of automobile automatic gearbox |
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| CN201510157527.XA CN104697790B (en) | 2015-04-03 | 2015-04-03 | Test measuring method for critical P-gear parking automobile speed of automobile automatic gearbox |
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| CN104697790B CN104697790B (en) | 2017-05-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105890897A (en) * | 2016-05-18 | 2016-08-24 | 苏州诚峰机电设备有限公司 | Driving end gear shifter simulation device of automobile gear shifting cable detection machine |
| CN112067284A (en) * | 2020-09-09 | 2020-12-11 | 广州汽车集团股份有限公司 | Off-line detection method and device for automobile parking mechanism |
| CN114274940A (en) * | 2021-12-30 | 2022-04-05 | 重庆长安汽车股份有限公司 | Parking force testing method and system for vehicle carrying electronic parking system |
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| CN201083606Y (en) * | 2007-08-24 | 2008-07-09 | 比亚迪股份有限公司 | Front drive transmission-gear box endurance test bench |
| CN101670832A (en) * | 2009-09-24 | 2010-03-17 | 上海中科深江电动车辆有限公司 | P step actuating mechanism of electric control mechanical automatic variable-speed device for electrically-operated car and control system |
| CN102004031B (en) * | 2010-10-12 | 2012-07-04 | 上海中科深江电动车辆有限公司 | Gear shift detection device and detection method for automated mechanical transmission for electric vehicle |
| CN204228429U (en) * | 2014-12-09 | 2015-03-25 | 安徽江淮汽车股份有限公司 | For detecting Comprehensive Testing Facility and the system of parking performance |
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2015
- 2015-04-03 CN CN201510157527.XA patent/CN104697790B/en not_active Expired - Fee Related
Non-Patent Citations (1)
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| 郇钲: "汽车电子驻车制动（EPB）控制系统设计与实现", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105890897A (en) * | 2016-05-18 | 2016-08-24 | 苏州诚峰机电设备有限公司 | Driving end gear shifter simulation device of automobile gear shifting cable detection machine |
| CN112067284A (en) * | 2020-09-09 | 2020-12-11 | 广州汽车集团股份有限公司 | Off-line detection method and device for automobile parking mechanism |
| CN114274940A (en) * | 2021-12-30 | 2022-04-05 | 重庆长安汽车股份有限公司 | Parking force testing method and system for vehicle carrying electronic parking system |
| CN114274940B (en) * | 2021-12-30 | 2023-09-15 | 重庆长安汽车股份有限公司 | Parking force testing method and system for vehicle carrying electronic parking system |
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