Electric water pump for engine cooling : DigInfo

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AISIN SEIKI Co., Ltd. / Electric water pump for engine cooling
At Automotive Engineering Expo 2009, Aisin Seiki presented a water pump for engine cooling.

Because this newly developed electric water pump is battery-powered instead of mechanically driven, it can be made to run only when necessary. This means that cooling of the engine can be controlled optimally. As a result, the load on the engine is also reduced, and its structure can be simplified. This is expected to reduce fuel expenditure for the car as a whole by about 2%.

Related Links :
- http://www.aisin.co.jp/news/d00219.html

Category:

News & Politics

Tags:

• DIgInfo
• 2009
• AISIN
• SEIKI
• Electric
• water
• pump
• for
• engine
• cooling
• Prius
• Toyota
• Hybrid
• Car

[braaup]

Just another thing to go bad.

[Lokivoid]

@1971SuperLead

yep as i stated "For general consumer or commerical use, No" The gains are not worth the added production costs. Though I would not be surpised if a overpriced BMW sport model utilized one to some degree, there always putting alot overly complicated systems in vehicals for minium gains. The testing aspect was more for personal entertainment value if anything, that and a excuse to piss off the neighbors.

[1971SuperLead]

@Lokivoid Common sense tells me that giant auto manufacturers have certainly entertained the idea of electric water pumps already......and found the test results to be disappointing.

[Lokivoid]

@1971SuperLead

I suppose that would depends on role of the vehical, for a high performance enthuiest with absoluteing no concerns on fuel econcomy or cost sure i can see it having a role. For general consumer or commerical use, No not atleast not with current designs anyways. Personally the only reason i would ever buy one (from a salvage yard) would be to experiment with on a CSB testbed and get some solid numbers down.

[1971SuperLead]

@Lokivoid Yup, the alternator would have to be about 50% larger to power the water pump. Lot's of costs involved to go electric. I wonder if it's all worth it.

[Lokivoid]

@1971SuperLead

Also keep in mind i am speaking for a engineering and mechanic standpoint (ASE certified in A6,A7,A8,A9). With that noted, i am not saying such a system is without faults, i was just simply stating the point of use. My personal concerns would be more towards the loads placed on the electrical system / alternator.

[Lokivoid]

@1971SuperLead

The theromostate depends on what level operation your going to place on the pump, in standard operation you would not need to replace it, as its just a thermomechanical bypass valve. I also never stated a electrical pump would be turned off at any given point of engine opperation. What i stated was micromanagement, with a electrical motor there is no need for cycleing on/off like "an AC compressor", as the electric motors speed is independantly variable.

[1971SuperLead]

@Lokivoid So the conventional thermostat is removed? If so, that might work...in colder climates. I hope you know that the water pump always has to be working to some degree or you will burn valves and warp decks. You might even crack the block if a sudden rush of cold water hits a warm block.

[Lokivoid]

@1971SuperLead

Trick with a electric pump is its variable, a clutch is ether on or off, once on the GPM rate is decided by engine RPM. electrical pumps allows better micromanagement, Overall it is not about electrical consumption. by having better variable controll over the load you can effective gain a fue horsepower on accelleration. Its the same concept as electric radiator fans.

[1971SuperLead]

You could put a clutch on a mechanical water pump and operate it like an AC compressor. Otherwise....this electric waterpump is actually going to use as much power or probably more power than a mechanical pump. Once the engine is up to operating temperature the pump has to be on continiously and an electric pump is going to use about 33% more power than a mechanical pump.