CN102180166B - Emission reduction method for controlling gear shift of automatic transmission - Google Patents
Emission reduction method for controlling gear shift of automatic transmission Download PDFInfo
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- CN102180166B CN102180166B CN 201110099565 CN201110099565A CN102180166B CN 102180166 B CN102180166 B CN 102180166B CN 201110099565 CN201110099565 CN 201110099565 CN 201110099565 A CN201110099565 A CN 201110099565A CN 102180166 B CN102180166 B CN 102180166B
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Abstract
The invention relates to an emission reduction method for controlling gear shift of an automatic transmission. The method comprises the following steps that: an engine control unit (ECU) recognizes a water temperature of an engine, a vehicle speed and a starting time so as to judge whether to heat a three-way catalyst, and enters an emission mode; when the water temperature of the engine is lower than a set temperature, the vehicle speed is lower than a set speed and the starting time is shorter than a set time, the ECU sends a signal for entering the emission mode to an automatic transmission control unit (TCU), and otherwise, quits the emission mode. In the method, different gear shift modes are configured according to a need to heat the three-way catalyst, so the gear shift can be delayed or a delay command can be released; and the need to heat the three-way catalyst is determined according to three existing signals such as the water temperature of the engine, the vehicle speed and the starting time. The working efficiency of the three-way catalyst is improved and the emission of the engine is reduced; meanwhile, the steerability in the original automatic transmission mode cannot be influenced.
Description
Technical field
The invention belongs to automatic gearbox control system technical field, be specifically related to a kind of control method that reduces engine emission of controlling by automatic gearbox gear shifting.
Background technology
There is the mandatory rules of law requirement in country to the blowdown of spark ignition engine, and blowdown mainly comprises CO, HC, NO
XThree kinds, generally carry out exhaust-gas after-treatment by ternary catalyzing unit, work efficiency and the temperature of ternary catalyzing unit have substantial connection, and it only reaches uniform temperature just can start working, and is commonly referred to initiation temperature.When vehicle just started, the three-element catalytic actuator temperature was usually lower, need to heat as early as possible ternary catalyzing unit to initiation temperature, could reduce the discharging of driving engine.The heating ternary catalyzing unit can reach requirement by controlling shifting of transmission.When the three-element catalytic actuator temperature was low, by upgrading more lately, so that engine operation is at high rotating speed, heatable catalytic converter reduced discharging to initiation temperature; After ternary catalyzing unit reaches initiation temperature, by upgrading quickly, so that engine operation at slow speed of revolution, reduces discharging.This just need to according to the temperature of Catalyst, realize with two kinds of patterns.
Generally automatic transmission with hydraulic torque converter only has a kind of pattern, the D pattern of namely commonly using, can only carry out gear shift according to accelerator open degree, the speed of a motor vehicle controls, owing to not carrying out the pattern of gear shift according to the temperature of ternary catalyzing unit, can not heat faster ternary catalyzing unit to initiation temperature when vehicle starting, thereby cause engine emission to increase; Even exceed standard, and be forced to the Catalyst that adopts price high, increase cost of development.
Summary of the invention
Purpose of the present invention provides a kind of control method of carrying out gear shift according to the operating temperature of ternary catalyzing unit outside automatic transmission with hydraulic torque converter D pattern, solve the problem that discharging exceeds standard; A kind of method that need to judge whether the heating ternary catalyzing unit is provided simultaneously.
For realizing above purpose, the present invention by the following technical solutions:
A kind of automatic transmission shift control method that reduces discharging, described method are when vehicle launch,
At first by engine controller ECU to identifying Engine Coolant Temperature, the speed of a motor vehicle, run up time, to determine whether needing heating ternary catalyzing unit (namely entering discharge mode): when Engine Coolant Temperature lower than design temperature, the speed of a motor vehicle is lower than setting speed, and run up time, engine controller ECU sent the signal that enters discharge mode to automatic transmission controller TCU during lower than setting-up time; Otherwise withdraw from discharge mode;
After automatic transmission controller TCU receives the signal of ECU, postpone to upgrade, make engine operation at high rotating speed, the heating ternary catalyzing unit;
To recognize Engine Coolant Temperature, the speed of a motor vehicle, run up time any one discontented when being enough to upper condition as ECU, do not need to heat ternary catalyzing unit, ECU sends command request TCU and returns to the D pattern, remove and postpone to upgrade, normally upgrade by throttle and the speed of a motor vehicle, make engine operation at normal speed, reduce discharging and oil consumption.
Described engine controller ECU to Engine Coolant Temperature, the speed of a motor vehicle, run up time identifying concrete grammar is: during less than 35 ° of C, enter speed of a motor vehicle Rule of judgment when Engine Coolant Temperature, during greater than 35 ° of C, withdraw from discharge mode when Engine Coolant Temperature; During less than 20kph, enter Rule of judgment run up time when the speed of a motor vehicle, during greater than 20kph, withdraw from discharge mode when the speed of a motor vehicle; During less than 50s, enter discharge mode when run up time, during greater than 50s, withdraw from discharge mode when run up time.
As seen, the present invention has increased ternary catalyzing unit ignition status signal, and this signal is sent by engine controller ECU, and automatic transmission controller TCU receives.When ECU need to heat ternary catalyzing unit, just send command request TCU and enter discharge mode, postpone to upgrade, make engine operation at high rotating speed, the heating ternary catalyzing unit.When ECU does not need to heat ternary catalyzing unit, just send command request TCU and return to the D pattern, remove delay and upgrade, make engine operation at normal speed, reduce discharging and oil consumption.
Simultaneously, increase heating ternary catalyzing unit condition for identification, and identified by ECU.Condition for identification comprises three of Engine Coolant Temperature, the speed of a motor vehicle, run up time, is all the existing signal of ECU controller.When Engine Coolant Temperature is low, show firm startup vehicle, need to enter discharge mode; When Engine Coolant Temperature is higher, need to withdraw from discharge mode.When the speed of a motor vehicle was low, expression vehicle ground zero need to enter discharge mode; When the speed of a motor vehicle is higher, need to withdraw from discharge mode.When run up time in short-term, the expression vehicle just start, need to enter discharge mode; Need to withdraw from discharge mode when long run up time.Only have and satisfy simultaneously this three conditions, discharge mode just starts; Otherwise withdraw from discharge mode.
The present invention arranges different shift modes according to whether needs heat ternary catalyzing unit, can postpone gear shift or remove and postpone order; And according to Engine Coolant Temperature, the speed of a motor vehicle, run up time three existing signals, need to judge whether the heating ternary catalyzing unit.Thereby reduce engine emission by improving the ternary catalyzing unit work efficiency, do not affect again the driving of original automatic transmission with hydraulic torque converter pattern simultaneously.
Description of drawings
In order to understand better control logic scheme of the present invention and the specific embodiment, should be by reference to the accompanying drawings referring to following detailed description.
Fig. 1 is that automatic transmission controller TCU is according to the logical diagram of Engine ECU instruction works.
Fig. 2 is the autoshift schematic diagram under discharge mode.
Fig. 3 is the condition schematic diagram of identification discharge mode.
The specific embodiment
Below with reference to accompanying drawing, the present invention is further described.
Fig. 1 be automatic transmission controller TCU according to the logical diagram of Engine ECU instruction works, ECU sends the instruction that whether enters discharge mode according to Engine Coolant Temperature, the speed of a motor vehicle, run up time, TCU receives instruction by the CAN communication:
1) when the ECU judgement does not need to enter discharge mode, ECU requires TCU at the D work pattern, carries out normal gear shift according to throttle size, the speed of a motor vehicle two parameters.
2) when the ECU judgement need to enter discharge mode, ECU requires TCU in discharge mode work, postpones gear shift according to throttle size, the speed of a motor vehicle two parameters.
Fig. 2 is the autoshift schematic diagram under discharge mode:
X-axis is the speed of a motor vehicle, and Y-axis is accelerator open degree.12_D is lower 1 liter of 2 grades of line of D pattern, and 23_D is lower 2 liters of 3 grades of lines of D pattern, and 34_D is lower 3 liters of 4 grades of lines of D pattern, and 45_D is lower 4 liters of 5 grades of lines of D pattern.The 12_ discharging is lower 1 liter of 2 grades of line of discharge mode, and the 23_ discharging is lower 2 liters of 3 grades of lines of discharge mode, and the 34_ discharging is lower 3 liters of 4 grades of lines of discharge mode, and the 45_ discharging is lower 4 liters of 5 grades of lines of discharge mode.
Under medium and small throttle, the speed of a motor vehicle when discharge mode upgrades is all high than D pattern, and main purpose is to postpone to upgrade to make engine operation at high rotating speed.
Under full throttle, because D mode engine working speed is originally higher, can reach heating ternary catalyzing unit purpose, therefore the shift point setting is identical with discharge mode.
Fig. 3 is the condition schematic diagram that enters discharge mode:
1) during less than 35 ° of C, enter speed of a motor vehicle Rule of judgment when Engine Coolant Temperature;
During greater than 35 ° of C, withdraw from discharge mode when Engine Coolant Temperature.
2) during less than 20kph, enter Rule of judgment run up time when the speed of a motor vehicle;
During greater than 20kph, withdraw from discharge mode when the speed of a motor vehicle.
3) during less than 50s, enter discharge mode when run up time;
During greater than 50s, withdraw from discharge mode when run up time.
The present invention is on automatic transmission with hydraulic torque converter D pattern commonly used, increases discharge mode; And according to Engine Coolant Temperature, the speed of a motor vehicle, run up time judging whether to enter discharge mode.When reducing engine emission, do not affect again D pattern driving.
Claims (2)
1. automatic transmission shift control method that reduces discharging, it is characterized in that: described method is when vehicle launch,
At first by engine controller ECU to identifying Engine Coolant Temperature, the speed of a motor vehicle, run up time, need to determine whether the heating ternary catalyzing unit, namely enter discharge mode: when Engine Coolant Temperature lower than design temperature, the speed of a motor vehicle is lower than setting speed, and run up time, engine controller ECU sent the signal that enters discharge mode to automatic transmission controller TCU during lower than setting-up time; Otherwise withdraw from discharge mode;
After automatic transmission controller TCU receives the signal of ECU, postpone to upgrade, make engine operation at high rotating speed, the heating ternary catalyzing unit;
To recognize Engine Coolant Temperature, the speed of a motor vehicle, run up time any one discontented when being enough to upper condition as ECU, do not need to heat ternary catalyzing unit, ECU sends command request automatic transmission controller TCU and returns to the D pattern, remove and postpone to upgrade, normally upgrade by throttle and the speed of a motor vehicle, make engine operation at normal speed, reduce discharging and oil consumption.
2. the automatic transmission shift control method of reduction according to claim 1 discharging, it is characterized in that: described engine controller ECU to Engine Coolant Temperature, the speed of a motor vehicle, run up time identifying concrete grammar is: when Engine Coolant Temperature during less than 35 ° of C, enter speed of a motor vehicle Rule of judgment, during greater than 35 ° of C, withdraw from discharge mode when Engine Coolant Temperature; During less than 20kph, enter Rule of judgment run up time when the speed of a motor vehicle, during greater than 20kph, withdraw from discharge mode when the speed of a motor vehicle; During less than 50s, enter discharge mode when run up time, during greater than 50s, withdraw from discharge mode when run up time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110099565 CN102180166B (en) | 2011-04-20 | 2011-04-20 | Emission reduction method for controlling gear shift of automatic transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110099565 CN102180166B (en) | 2011-04-20 | 2011-04-20 | Emission reduction method for controlling gear shift of automatic transmission |
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| CN102180166A CN102180166A (en) | 2011-09-14 |
| CN102180166B true CN102180166B (en) | 2013-06-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103266958B (en) * | 2013-05-13 | 2017-01-25 | 浙江吉利汽车研究院有限公司杭州分公司 | Fast ignition method and device of catalytic converter |
| CN111845275A (en) * | 2019-04-26 | 2020-10-30 | 广州汽车集团股份有限公司 | A kind of automobile air conditioning control method, system and vehicle |
| CN114704631B (en) * | 2022-05-09 | 2024-06-18 | 潍柴动力股份有限公司 | Gear shifting control method and device, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584393B1 (en) * | 1999-02-11 | 2003-06-24 | Zf Friedrichshafen Ag | Method for controlling an automatic gearbox of a motor vehicle which is driven by an internal combustion engine having an exhaust-gas catalytic converter |
| CN1431393A (en) * | 2002-01-11 | 2003-07-23 | 日产自动车株式会社 | Appts. and method for exhaust and purification of I.C. engine |
| CN101660457A (en) * | 2008-08-28 | 2010-03-03 | 通用汽车环球科技运作公司 | Multi-pulse spark ignition direct injection torque based system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05157175A (en) * | 1991-04-19 | 1993-06-22 | Toyota Motor Corp | Shift timing commanding device for transmission for vehicle |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584393B1 (en) * | 1999-02-11 | 2003-06-24 | Zf Friedrichshafen Ag | Method for controlling an automatic gearbox of a motor vehicle which is driven by an internal combustion engine having an exhaust-gas catalytic converter |
| CN1431393A (en) * | 2002-01-11 | 2003-07-23 | 日产自动车株式会社 | Appts. and method for exhaust and purification of I.C. engine |
| CN101660457A (en) * | 2008-08-28 | 2010-03-03 | 通用汽车环球科技运作公司 | Multi-pulse spark ignition direct injection torque based system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平5-157175A 1993.06.22 |
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