Pierburg CWA Coolant Pumps: Difference between revisions
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The Pierburg CWA Coolant Pumps (200/400) are well known in hot rod engine swaps as they are significant coolant pumps that have the ability to be PWM Controlled, however connecting the PWM pin to +12V permanently also gives 95% speed. | The Pierburg CWA Coolant Pumps (200/400) are well known in hot rod engine swaps as they are significant coolant pumps that have the ability to be PWM Controlled, however connecting the PWM pin to +12V permanently also gives 95% speed. | ||
A CWA200 has been dismantled here | A CWA200 has been dismantled here<ref>https://openinverter.org/forum/viewtopic.php?p=6283&hilit=cwa200#p6283</ref> | ||
== CWA 200 == | == CWA 200 == | ||
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'''PWM Control:''' | '''PWM Control:''' | ||
The Pump can be PWM controlled ( | The Pump can be PWM controlled<ref>https://www.tecomotive.com/download/PWMinfo_EN.pdf (https://web.archive.org/web/20220520041935/https://www.tecomotive.com/download/PWMinfo_EN.pdf)</ref>, however a uninterrupted high pulse of 3ms must be applied at startup(50% duty at 150 Hz). | ||
Duty Cycle: | Duty Cycle: | ||
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• 98 – 100% → Emergency running (about 95% speed) | • 98 – 100% → Emergency running (about 95% speed) | ||
An example curcuit and code using an arduino nano has been demonstrated on the internet site www.instructables.com ( | An example curcuit and code using an arduino nano has been demonstrated on the internet site www.instructables.com<ref>https://www.instructables.com/Use-an-Arduino-to-Drive-a-Pierburg-CWA200-Car-Elec/ (https://web.archive.org/web/20230711100850/https://www.instructables.com/Use-an-Arduino-to-Drive-a-Pierburg-CWA200-Car-Elec/)</ref> | ||
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The data pin is called BSD. Bit Stream Serial Data. It reports an incredible amount of data including pump rpm , water temp, run time etc. | The data pin is called BSD. Bit Stream Serial Data. It reports an incredible amount of data including pump rpm , water temp, run time etc. | ||
Useful data/information has been collected on an external ice forum ( | Useful data/information has been collected on an external ice forum<ref>https://forums.linkecu.com/topic/11204-water-pump-pwm/ (https://web.archive.org/web/20230711101334/https://forums.linkecu.com/topic/11204-water-pump-pwm/)</ref> including using suggestion with using 10k resistor with a low side output to generate a positive 12v pwm. | ||
== '''References:''' == | |||
<references /> | |||
Unused? https://www.tecomotive.com/en/products/CWA200.html (https://web.archive.org/web/20220126044120/https://www.tecomotive.com/en/products/CWA200.html) | |||
[[Category:OEM]] | [[Category:OEM]] | ||
Revision as of 21:26, 24 July 2023
Work In progress
The Pierburg CWA Coolant Pumps (200/400) are well known in hot rod engine swaps as they are significant coolant pumps that have the ability to be PWM Controlled, however connecting the PWM pin to +12V permanently also gives 95% speed.
A CWA200 has been dismantled here[1]
CWA 200
PUMP OEM Part Numbers:
BMW: 11517586925 / 11517586924 / 11517563183 / 11517546994 / 11517545201 / 1151752158
PWM Control:
The Pump can be PWM controlled[2], however a uninterrupted high pulse of 3ms must be applied at startup(50% duty at 150 Hz).
Duty Cycle:
• 0 – 1% → Stop
• 1 – 7% → Emergency running (about 95% speed)
• 8 – 12% → Stop / Error Reset
• 13 – 85% → Controlled operation from min to max speed
• 86 – 97% → Maximum speed
• 98 – 100% → Emergency running (about 95% speed)
An example curcuit and code using an arduino nano has been demonstrated on the internet site www.instructables.com[3]
Connector:
4Pin Car Kostal Housing Plug Female: 1JBJ21 9441491 (BMW), 2E0905229 (Merc) Available from Aliexpress
Notes:
The data pin is called BSD. Bit Stream Serial Data. It reports an incredible amount of data including pump rpm , water temp, run time etc.
Useful data/information has been collected on an external ice forum[4] including using suggestion with using 10k resistor with a low side output to generate a positive 12v pwm.
References:
- ↑ https://openinverter.org/forum/viewtopic.php?p=6283&hilit=cwa200#p6283
- ↑ https://www.tecomotive.com/download/PWMinfo_EN.pdf (https://web.archive.org/web/20220520041935/https://www.tecomotive.com/download/PWMinfo_EN.pdf)
- ↑ https://www.instructables.com/Use-an-Arduino-to-Drive-a-Pierburg-CWA200-Car-Elec/ (https://web.archive.org/web/20230711100850/https://www.instructables.com/Use-an-Arduino-to-Drive-a-Pierburg-CWA200-Car-Elec/)
- ↑ https://forums.linkecu.com/topic/11204-water-pump-pwm/ (https://web.archive.org/web/20230711101334/https://forums.linkecu.com/topic/11204-water-pump-pwm/)
Unused? https://www.tecomotive.com/en/products/CWA200.html (https://web.archive.org/web/20220126044120/https://www.tecomotive.com/en/products/CWA200.html)