CN109339932A - Cooling water pump control method - Google Patents
Cooling water pump control method Download PDFInfo
- Publication number
- CN109339932A CN109339932A CN201811159740.4A CN201811159740A CN109339932A CN 109339932 A CN109339932 A CN 109339932A CN 201811159740 A CN201811159740 A CN 201811159740A CN 109339932 A CN109339932 A CN 109339932A
- Authority
- CN
- China
- Prior art keywords
- water pump
- duty ratio
- threshold range
- cooling water
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of cooling water pump control methods, including judge whether water pump needs to operate；If so, the first duty ratio of pwm signal is set in first threshold range；First duty ratio is dropped into second threshold range with the first setting slope, and obtains the second duty ratio；Second duty ratio is dropped to 0.Cooling water pump control method provided by the invention, the slope set by making duty ratio rise or fall, and thus avoid noise and vibration that water pump is generated in switch operating state, while can be with energy saving.
Description
Technical field
The present invention relates to automobile technical field more particularly to a kind of cooling water pump control methods.
Background technique
Currently in order to reducing vehicle oil consumption, and reach better control effect, automobile engine gradually starts using automatically controlled
Formula cooling water pump technology, wherein having a kind of water pump is to drive its internal relay structure by Engine ECU pin, only often turn and
Two kinds of working conditions are stalled, ECU makes the coil being arranged inside water pump according to the cooling requirement under different operating conditions, by controlling pin
On/off electricity realizes the switching of pump working state, thus can shorten the warm-up period after cold-starting, reduces oil consumption.So
And due to water pump internal relay structure, mechanical noise will lead in low and high level handoff procedure.I.e. in the prior art, when
When ECU judges that water pump is not required to operating according to current working, 100% directly is set by pwm signal；And when ECU is according to current work
When condition judges that water pump needs full-speed operation, then 0 (i.e. directly cutting control electric current) directly is set by the duty ratio of pwm signal.By
This, water pump can issue biggish noise in above two working condition handoff procedure.
Summary of the invention
The object of the present invention is to provide a kind of cooling water pump control methods, to solve above-mentioned the problems of the prior art, drop
The noise that low water pump occurs when working condition switches.
The present invention provides a kind of cooling water pump control methods, wherein includes:
Judge whether water pump needs to operate；
If so, the duty ratio for the pwm signal for controlling water pump is set in first threshold range；
The duty ratio is dropped into second threshold range with the first setting slope；
The duty ratio is dropped to 0.
Cooling water pump control method as described above, wherein preferably, if it is determined that the knot whether water pump needs to operate
Fruit be it is no, the method also includes:
The duty ratio of pwm signal is set in third threshold range；
The duty ratio is risen into the 4th threshold range with the second setting slope；
The duty ratio is risen to 100%；
After keeping setting time, the duty ratio is dropped into the 5th threshold range, the 5th threshold range from 100%
Upper limit value be less than the lower limit value of the 4th threshold range, the lower limit value of the 5th threshold range is greater than the third threshold value
The upper limit value of range.
Cooling water pump control method as described above, wherein preferably, the first threshold range is 35%~
45%.
Cooling water pump control method as described above, wherein preferably, the second threshold range is 23%~
18%.
Cooling water pump control method as described above, wherein preferably, the third threshold range is 25%~
35%.
Cooling water pump control method as described above, wherein preferably, the 4th threshold range is 75%~
85%.
Cooling water pump control method as described above, wherein preferably, the 5th threshold range is 60%~
70%.
Cooling water pump control method provided by the invention, the slope set by making duty ratio rise or fall, thus
The noise and vibration that water pump is generated in switch operating state are avoided, while can be with energy saving.
Detailed description of the invention
Fig. 1 is the flow chart for the cooling water pump control method that an embodiment of the present invention provides；
Fig. 2 is the flow chart for the cooling water pump control method that another embodiment of the present invention provides；
Fig. 3 is the variation schematic diagram that water pump never needs to run to duty ratio when needing to operate；
Fig. 4 is the variation schematic diagram that water pump runs to duty ratio when not needing operating from needs；
Fig. 5 runs to not needing to operate from needs for water pump to be shown to the variation for needing to operate the duty ratio in all processes again
It is intended to.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
As shown in Fig. 1, Fig. 3 and Fig. 5, the embodiment of the invention provides a kind of cooling water pump control methods comprising as follows
Step:
Step S1, judge whether water pump needs to operate；If so, entering step S2.
Step S2, the duty ratio for controlling the pwm signal of water pump is set in first threshold range.Wherein, first threshold model
Enclosing to be 35%~45%, and the value of duty ratio is 42%；That is, when water pump does not need operating, the control of ECU controller
Duty ratio is reduced to 42% from initial value in advance, with the switching of quick response pump working state；Wherein, the initial value of duty ratio
It can be 62%.
Step S3, the above-mentioned duty ratio in first threshold range is dropped into second threshold model with the first setting slope
It encloses.Wherein, second threshold may range from 23%~18%, and the occurrence of duty ratio is 20%.When duty ratio is to set
When determining slope and gradually decreasing, to avoid duty ratio in the prior art as 100% can directly be reduced to 0 and caused by noise and vibration
It is dynamic.Wherein, noise of the first setting slope when can be according to water pump switch operating state and magnitude of vibrations select optimal value,
To this, this embodiment is not limited.
Step S4, the above-mentioned duty ratio within the scope of second threshold is dropped to 0, at this point, water pump can be with full-speed operation.
Further, as shown in Fig. 2, Fig. 4 and Fig. 5, if the result of step S1 is no, this method further include:
Step S5, the duty ratio of pwm signal is set in third threshold range.Wherein, third threshold range can be
25%~35%, the value of duty ratio is preferably 30%；That is, it is pre- from 0 that ECU controller controls duty ratio when water pump needs to operate
30% is risen to, first with the switching of quick response pump working state.
Step S6, the above-mentioned duty ratio in third threshold range is risen into the 4th threshold value model with the second setting slope
It encloses.Wherein, the 4th threshold range can be 75%~85%, and duty ratio is preferably 80%.Third threshold range is in when above-mentioned
When interior duty ratio is gradually increasing with setting slope, directly 100% can be risen to by 0 to avoid duty ratio in the prior art and made
At noise and vibration.Wherein, noise and magnitude of vibrations when which can be according to water pump switch operating state
Optimal value is selected, to this this embodiment is not limited.
Step S7, the above-mentioned duty ratio being in the 4th threshold range is risen to 100%.
Step S8, after keeping setting time, duty ratio is dropped into the 5th threshold range from 100%.Wherein, the 5th threshold value
The upper limit value of range is less than the lower limit value of the 4th threshold range, and the lower limit value of the 5th threshold range is greater than the third
The upper limit value of threshold range, is specifically as follows 60%~70%, to guarantee that water pump runs well, while energy saving.Wherein, institute
The time for stating setting can be 0.2s.
Cooling water pump control method provided in an embodiment of the present invention, the slope that is set by making duty ratio rise or under
Drop, thus avoids the noise and vibration that water pump is generated in switch operating state, while can be with energy saving.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (7)
1. a kind of cooling water pump control method characterized by comprising
Judge whether water pump needs to operate；
If so, the duty ratio for the pwm signal for controlling water pump is set in first threshold range；
The duty ratio is dropped into second threshold range with the first setting slope；
The duty ratio is dropped to 0.
2. cooling water pump control method according to claim 1, which is characterized in that if it is determined that whether water pump needs to operate
Result be it is no, the method also includes:
The duty ratio of pwm signal is set in third threshold range；
The duty ratio is risen into the 4th threshold range with the second setting slope；
The duty ratio is risen to 100%；
After keeping setting time, the duty ratio is dropped into the 5th threshold range from 100%, the 5th threshold range it is upper
Limit value is less than the lower limit value of the 4th threshold range, and the lower limit value of the 5th threshold range is greater than the third threshold range
Upper limit value.
3. cooling water pump control method according to claim 1, which is characterized in that the first threshold range be 35%~
45%.
4. cooling water pump control method according to claim 1, which is characterized in that the second threshold range be 23%~
18%.
5. cooling water pump control method according to claim 1, which is characterized in that the third threshold range be 25%~
35%.
6. cooling water pump control method according to claim 1, which is characterized in that the 4th threshold range be 75%~
85%.
7. cooling water pump control method according to claim 1, which is characterized in that the 5th threshold range be 60%~
70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159740.4A CN109339932A (en) | 2018-09-30 | 2018-09-30 | Cooling water pump control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159740.4A CN109339932A (en) | 2018-09-30 | 2018-09-30 | Cooling water pump control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109339932A true CN109339932A (en) | 2019-02-15 |
Family
ID=65307572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811159740.4A Pending CN109339932A (en) | 2018-09-30 | 2018-09-30 | Cooling water pump control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109339932A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111688473A (en) * | 2020-06-16 | 2020-09-22 | 宜宾凯翼汽车有限公司 | Electric automobile water pump control method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104160618A (en) * | 2012-03-07 | 2014-11-19 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method and circuit arrangement for limiting peak currents and pitch of current flanks |
| CN107237762A (en) * | 2017-06-30 | 2017-10-10 | 北京长安汽车工程技术研究有限责任公司 | Control method, control system, cooling circuit and the electric car of water pump |
-
2018
- 2018-09-30 CN CN201811159740.4A patent/CN109339932A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104160618A (en) * | 2012-03-07 | 2014-11-19 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method and circuit arrangement for limiting peak currents and pitch of current flanks |
| CN107237762A (en) * | 2017-06-30 | 2017-10-10 | 北京长安汽车工程技术研究有限责任公司 | Control method, control system, cooling circuit and the electric car of water pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111688473A (en) * | 2020-06-16 | 2020-09-22 | 宜宾凯翼汽车有限公司 | Electric automobile water pump control method and system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190215 |