Systems view of two-mode hybrid

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05-12-2007, 12:44 AM

bwilson4web

Engineering first

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Join Date: Oct 2005

Location: Huntsville, AL

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Systems view of two-mode hybrid

http://www.isa.org/InTechTemplate.cf...ontentID=61619

Quote:

. . . once you settle into a fairly steady speed, four of the eight cylinders will shut down. A large SUV only needs about 30 horsepower to maintain its way at steady speeds, said Tim Grewe, chief engineer for the two-mode hybrid system.
The hybrid system acts to expand the envelope within which the SUV can operate in four-cylinder mode, thus improving highway fuel economy.
. . .

This is a nice systems description of the two-mode hybrid. Without delving into a question of parts count and reliability, this is a reasonable architecture.

Bob Wilson

05-13-2007, 09:12 AM

martinjlm

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Join Date: Sep 2005

Location: Detroit

Posts: 564

Re: Systems view of two-mode hybrid

Here's a local Detroit TV news snippet on the 2-Mode sytem.

http://www.clickondetroit.com/video/13300603/index.html

Peace,

Martin

fwiw - Baseball fans might be interested in knowing that the anchorman is Steve Garagiola, son of former major leaguer Joe Garagiola

05-20-2007, 03:07 PM

jdenenberg

Engineering Professor

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Location: Connecticut

Posts: 375

Re: Systems view of two-mode hybrid

Quote:

Originally Posted by martinjlm

But where is an AWD hybrid with good MPG? (I won't ever buy another Ford, so don't point at the Escape or Mariner) The ones from GM are all FWD. The non-hybrids have AWD, why not the Hybrids?

I'll wait for a Subaru hybrid or a Toyota Rav4 (if they go for MPG - not performance). Hey Toyota, how about adding AWD to the Prius as an option like you do in the Highlander and Lexus?

JeffD

05-21-2007, 07:22 AM

martinjlm

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Join Date: Sep 2005

Location: Detroit

Posts: 564

Re: Systems view of two-mode hybrid

Quote:

Originally Posted by jdenenberg

But where is an AWD hybrid with good MPG? (I won't ever buy another Ford, so don't point at the Escape or Mariner) The ones from GM are all FWD. The non-hybrids have AWD, why not the Hybrids?

I'll wait for a Subaru hybrid or a Toyota Rav4 (if they go for MPG - not performance). Hey Toyota, how about adding AWD to the Prius as an option like you do in the Highlander and Lexus?

JeffD

Go back and take another look at the clip. The hybrid being tested is a Chevrolet Tahoe, which is available as RWD (not FWD) and AWD.

Peace,

Martin