CN101554871A - Method for controlling oil temperature of transmission and water temperature of engine of AMT transmission at low temperature - Google Patents
Method for controlling oil temperature of transmission and water temperature of engine of AMT transmission at low temperature Download PDFInfo
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- CN101554871A CN101554871A CNA2009101038908A CN200910103890A CN101554871A CN 101554871 A CN101554871 A CN 101554871A CN A2009101038908 A CNA2009101038908 A CN A2009101038908A CN 200910103890 A CN200910103890 A CN 200910103890A CN 101554871 A CN101554871 A CN 101554871A
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- engine coolant
- transmission
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Abstract
The invention discloses a method for controlling oil temperature of a transmission and water temperature of an engine of an AMT transmission at low temperature. The method is used in the condition of low temperature so that the control systems of the engine and the transmission can obtain the signals of the oil temperature of the transmission and the water temperature of the engine, and then controls the shift of transmission gears according to the setting temperature, thereby accomplishing the aim of limiting shifting into high gear at low temperature to protect the transmission and the engine. When the water temperature of the engine or the oil temperature of the transmission are lower than a setting value, the transmission is prohibited from shifting into high gear and allowed to work in low gear working area, and the engine is allowed to work at high speed and the water temperature of the engine is led to increase quickly. The function keeps working until the oil temperature of the transmission and the water temperature of the engine simultaneously exceed the setting temperature.
Description
Technical field
The invention belongs to automotive engine control system of speed variator technical field, relate to the gentle Engine Coolant Temperature control method of transmission oil under a kind of AMT transmission mechanism low temperature.
Background technology
AMT is also heating up to its research year by year owing to had extremely each the big automobile vendor favor since the last century the eighties of driving efficiency height, mechanism's compactness, reliable operation, advantage such as cheap.The AMT car is a kind of economical and practical change-speed box, meets very much the national conditions of China, will have very big development in China.But also there are its some shortcomings in the AMT change-speed box.At the car that uses AMT at China's cold district, mainly when starting, there is following problem.Can arrive subzero 20 degrees centigrade to subzero about 30 degrees centigrade cold district (as the Northeast) the winter environment temperature, the gentle Engine Coolant Temperature of its transmission oil all can be at lower temperature when starting automobile, and transmission oil generally compares thickness under the low temperature condition, therefore the resistance that is subjected to during the transmission gear transmission is bigger, shift impact is more obvious, influences shift feel, change-speed box service life and engine efficiency; And Engine Coolant Temperature is crossed performance and work efficiency that low back influences driving engine, and the rising of gearbox oil temperature is also reconciled by Engine Coolant Temperature, warm air systems etc. all are to reconcile by Engine Coolant Temperature, and the Engine Coolant Temperature normal working temperature is also about 80 degrees centigrade.
Summary of the invention
The objective of the invention is to overcome above many shortcomings; the control method of the gentle Engine Coolant Temperature of a kind of AMT change-speed box transmission oil at low temperatures is provided; be used for driving engine and the gentle Engine Coolant Temperature signal of control system of speed variator acquisition transmission oil under low temperature condition; control the variation of Transmission gear then according to the temperature of setting, thereby to reach the purpose that under low temperature condition, limits change up protection change-speed box and driving engine.
The present invention is specifically by the following technical solutions:
A kind of AMT gearbox oil temperature and Engine Coolant Temperature control method is characterized in that:
Gather the gearbox oil temperature signal by TOTS, and this gearbox oil temperature signal is passed to transmission control unit TCU;
Gather the Engine Coolant Temperature signal and this Engine Coolant Temperature signal is passed to control unit of engine ECU by engine water temperature sensor;
Described control unit of engine ECU passes to transmission control unit TCU with the Engine Coolant Temperature signal of being gathered by the CAN bus;
Transmission control unit TCU with the gearbox oil temperature value of gathering and Engine Coolant Temperature value respectively with gearbox oil temperature preset value and Engine Coolant Temperature preset value compare, when described gearbox oil temperature value less than described gearbox oil temperature preset value and described Engine Coolant Temperature value during less than the Engine Coolant Temperature preset value, transmission control unit TCU sends the restriction request of upgrading to speed-changer executing mechanism, forbid that change-speed box rises up into the top grade of setting, can only switch in the low grade of setting, thereby the higher rotation speed work when making driving engine with low gear makes the water temperature fast rise;
When described Engine Coolant Temperature value and described gearbox oil temperature value all reached gearbox oil temperature preset value and Engine Coolant Temperature preset value, transmission control unit TCU cancelled upgrading request of restriction, and change-speed box recovers normally also can carry out gear switch between all gears.
By after implementing occurs at low temperatures motivation water temperature and gearbox oil temperature control method, Engine Coolant Temperature and gearbox oil temperature have obtained the fast speed rising under cryogenic conditions in AMT change-speed box car.This not only can allow the automotive engine fast speed work in normal range of operation can also well protect driving engine and change-speed box, prolongs its service life.Thereby and if for the user, under the low excessively situation of ambient temperature, need steering vehicle also the dispense with parking warming-up directly steering vehicle saved the time for the user.The protection to driving engine and change-speed box and even whole car load that brings by this invention is huge, has improved engine efficiency and has also improved fuel economy simultaneously.
Description of drawings
Fig. 1 is engine water temperature control and gearbox oil temperature control logic technical scheme figure;
Fig. 2 is AMT change-speed box car transmission mechanism and motor mechanisms concrete control method and the control flow chart under low temperature condition that provides according to embodiments of the invention;
Wherein signal control flow process of the present invention has been embodied in the double-head arrow zone.
The specific embodiment
Also in conjunction with specific embodiments technical scheme of the present invention is described in further detail according to Figure of description below.
Making the gentle gearbox oil temperature fast speed rising of engine water not only can allow the automotive engine fast speed work in normal range of operation under cryogenic conditions can also well protect driving engine and change-speed box, prolong its service life.Thereby and if for the user, under the low excessively situation of ambient temperature, need steering vehicle also the dispense with parking warming-up directly steering vehicle saved the time for the user.In order to reach these advantages, the invention provides and a kind ofly can under cryogenic conditions, behind automobile starting, make the zooming method of the gentle gearbox oil temperature of engine water.Control method (is lower than negative 40 degrees centigrade as Engine Coolant Temperature for be lower than a certain setting value at Engine Coolant Temperature or gearbox oil temperature, gearbox oil temperature is lower than 15 degrees centigrade) just forbid that the change-speed box change up makes it work in low-grade work area, allow driving engine in higher rotation speed work, make the Engine Coolant Temperature fast rise, this function stop work when the gentle Engine Coolant Temperature of transmission oil surpasses the temperature value of setting simultaneously.Wherein incoming signal is Engine Coolant Temperature signal and gearbox oil temperature signal, the restriction that output signal sends for the change-speed box TCU request of upgrading.
In order to realize the present invention, now take logic control scheme as shown in Figure 1.As can be seen from Figure 1 TOTS gather the gearbox oil temperature signal and with signal pass to TCU, engine water temperature sensor is gathered the Engine Coolant Temperature signal and signal is passed to ECU; ECU passes to TCU with the Engine Coolant Temperature signal by the CAN bus; TCU compares gearbox oil temperature value t1 and the Engine Coolant Temperature value t2 that gathers respectively with setting gearbox oil temperature value t10 and setting Engine Coolant Temperature value t20; If t1≤t10 result is designated as 1, t1＞t10 result is designated as 0, t2≤t20 result is designated as 1, t2＞t20 result is designated as 0.TCU passes to speed-changer executing mechanism with comparison result value, and actuating unit carries out AND-operation with two groups of comparative results and obtains a result 1 or 0, and wherein 1 representative is carried out change-speed box and limited high-grade function, and change-speed box is not carried out in 0 representative, and to limit high-grade function be normal operation.By above logic control scheme, the restriction change up satisfies demand for control under low temperature condition thereby we can reach.
As can be seen from Figure 2 the Engine Coolant Temperature signal of gathering is sent in the Engine ECU at engine starting rear engine cooling-water temperature sensor, and from Engine ECU, water temperature signal is sent among the change speed gear box TCU by the CAN bus, change speed gear box TCU analyzes this signal with the gearbox oil temperature signal of Transmission Oil Temperature sensor acquisition, change speed gear box TCU sends the restriction request of upgrading to speed-changer executing mechanism when Engine Coolant Temperature or any one value of gearbox oil temperature are lower than setting value, forbid that change-speed box rises up into the top grade of setting (as fourth gear), can only switch (as one grade in the low grade of setting, second gear, third gear), and change speed gear box TCU cancels upgrading request of restriction when Engine Coolant Temperature value and gearbox oil temperature value reach setting value simultaneously, and change-speed box recovers normally also can carry out gear switch automatically between four gears.Thereby reached the function of controlling shift of transmission by the gentle Engine Coolant Temperature of transmission oil by implementing above control method.This invention is simple to operation, if related sensor is arranged on the AMT, can directly utilize AMT to go up existing TOTS and engine water temperature sensor image data signal, thereby provide cost savings and need not to purchase in addition sensor hardware, the execution function that the invention of this control method only need be revised change-speed box TCU and speed-changer executing mechanism control program and increase change-speed box actr can realize, implements simple.
Claims (2)
1, a kind of AMT gearbox oil temperature and Engine Coolant Temperature control method is characterized in that:
Gather the gearbox oil temperature signal by TOTS, and this gearbox oil temperature signal is passed to transmission control unit TCU;
Gather the Engine Coolant Temperature signal and this Engine Coolant Temperature signal is passed to control unit of engine ECU by engine water temperature sensor;
Described control unit of engine ECU passes to transmission control unit TCU with the Engine Coolant Temperature signal of being gathered by the CAN bus;
Transmission control unit TCU with the gearbox oil temperature value of gathering and Engine Coolant Temperature value respectively with gearbox oil temperature preset value and Engine Coolant Temperature preset value compare, when described gearbox oil temperature value less than described gearbox oil temperature preset value and described Engine Coolant Temperature value during less than the Engine Coolant Temperature preset value, transmission control unit TCU sends the restriction request of upgrading to speed-changer executing mechanism, forbid that change-speed box rises up into the top grade of setting, can only switch in the low grade of setting;
When described Engine Coolant Temperature value and described gearbox oil temperature value all reached gearbox oil temperature preset value and Engine Coolant Temperature preset value, transmission control unit TCU cancelled upgrading request of restriction, and change-speed box recovers normally also can carry out gear switch between all gears.
2, AMT gearbox oil temperature according to claim 1 and Engine Coolant Temperature control method is characterized in that: described Engine Coolant Temperature preset value is negative 40 degrees centigrade, and described gearbox oil temperature preset value is 15 degrees centigrade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101038908A CN101554871A (en) | 2009-05-20 | 2009-05-20 | Method for controlling oil temperature of transmission and water temperature of engine of AMT transmission at low temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101038908A CN101554871A (en) | 2009-05-20 | 2009-05-20 | Method for controlling oil temperature of transmission and water temperature of engine of AMT transmission at low temperature |
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| Publication Number | Publication Date |
|---|---|
| CN101554871A true CN101554871A (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2009101038908A Pending CN101554871A (en) | 2009-05-20 | 2009-05-20 | Method for controlling oil temperature of transmission and water temperature of engine of AMT transmission at low temperature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506161A (en) * | 2011-11-03 | 2012-06-20 | 上海本安汽车传动技术有限公司 | Automatic mechanical speed changer control system |
| CN106644473A (en) * | 2017-03-14 | 2017-05-10 | 芜湖万里扬变速器有限公司 | Manual-automatic gearbox delivery and checking test control method |
| CN104340209B (en) * | 2013-07-26 | 2017-06-09 | 通用汽车环球科技运作有限责任公司 | Monitoring of the speed changer to the velocity request of engine |
-
2009
- 2009-05-20 CN CNA2009101038908A patent/CN101554871A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506161A (en) * | 2011-11-03 | 2012-06-20 | 上海本安汽车传动技术有限公司 | Automatic mechanical speed changer control system |
| CN104340209B (en) * | 2013-07-26 | 2017-06-09 | 通用汽车环球科技运作有限责任公司 | Monitoring of the speed changer to the velocity request of engine |
| CN106644473A (en) * | 2017-03-14 | 2017-05-10 | 芜湖万里扬变速器有限公司 | Manual-automatic gearbox delivery and checking test control method |
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Open date: 20091014 |