HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Automotive News

Start/Stop 'Wave Is Coming,' Says Supplier

NO RATINGS
View Comments: Newest First|Oldest First|Threaded View
Walt
User Rank
Gold
Longevity Issues
Walt   1/3/2012 12:13:14 PM
NO RATINGS

For a fuel savings of only 3~5% - and then only in city driving – I'd hate to add the longevity and reliability issues likely to occur:


Stopping an ICE generally causes a short-term, but fast and significant increase in case temperature.  The only prevention of this is to continue the flow of coolant through the engine, plus the radiator fan in many cases.  Now the electrical system must support the coolant pump at every stop.  It must also ensure that over-cooling does not occur to reduce temperature changes, which shorten the life of the internals of the ICE.


I'd also be surprised if even an improved starter and flywheel could put up with engine starts at every stop without significantly reducing the lifespan.  It seems this should be accomplished via the power train.  This would only be feasible in a hybrid electric or starting from each stopped position would include the delay of the initial stabilization of the ICE after startup.

For a person that expects 200K~300K miles of good service from a vehicle, these look like shaky configurations for this small level of fuel efficiency.

 

Jerry dycus
User Rank
Gold
Not new
Jerry dycus   1/3/2012 9:34:36 AM
NO RATINGS
 

           This tech isn't new as it's been done for over 50 yrs, just rarely in cars because gas was so cheap.  Many used the old DynaStart generator/starter unit back in the 40's.

          I fail to see why instead all cars don't have the flywheel as the starter/alt that can also be used for regen/braking and acceleration boost at little extra cost if any.  By joining the 3 saves copper, alum casings, pulleys, belts and their losses, etc,

             And savings from a smaller engine could make it even cost less while cutting fuel use 15-20%.

Partner Zone
More Blogs from Automotive News
Take a look at 15 of the most important automotive safety technologies from the past 50 years and the next half-century.
If thereís a rule of thumb in modern engine design, itís that smaller is better. Smaller engines weigh less, burn less fuel, and simplify packaging.
Higher prices and glitzy new technologies donít necessarily make for better automotive headlights, a first-ever study from the Insurance Institute for Highway Safety suggests.
A February letter from federal regulators to Google Inc. appears to have sent automakers and tier-one suppliers scrambling to accelerate their investments in autonomous vehicle technology.
Tesla Motorsí $35,000, 200-mile electric car may not revolutionize the auto industry by itself, but it could serve as a starting point for a long, steady climb to a day when half of the worldís vehicles will be plug-ins.
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Course June 28-30:
Sponsored by Proto Labs
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service