I saw on TV not long ago something about Hybrid buses being used in
London - not those hopeless fuel cell things but a diesel engine plus
electric motor. Are these out and about yet?

B2003

Boltar ) gurgled happily, sounding much like they
were saying :

I saw on TV not long ago something about Hybrid buses being used in
London - not those hopeless fuel cell things but a diesel engine plus
electric motor. Are these out and about yet?

February 2006.
http://www.tfl.gov.uk/corporate/medi...ntre/3680.aspx

And double-deckers since November 2006.
http://news.bbc.co.uk/1/hi/england/london/6102806.stm

On 6 Jul, 09:56, Adrian wrote:
Boltar ) gurgled happily, sounding much like they
were saying :

I saw on TV not long ago something about Hybrid buses being used in
London - not those hopeless fuel cell things but a diesel engine plus
electric motor. Are these out and about yet?

February 2006.http://www.tfl.gov.uk/corporate/medi...ntre/3680.aspx

And double-deckers since November 2006.http://news.bbc.co.uk/1/hi/england/london/6102806.stm

Anyone know what routes?

B2003

On 6 Jul, 09:56, Adrian wrote:
February 2006.http://www.tfl.gov.uk/corporate/medi...ntre/3680.aspx

From the article:

"The battery pack is kept at optimum power by a 1.9 litre diesel Euro
IV engine. In other words, an engine which would normally be found in
a family car keeps the battery"

1.9 sounds a bit too small. I'm sure in start and stop traffic it
might be ok but ultimately the energy all comes from that engine.
Seems to me the bus would be hopeless for any long or even middle
distance runs especially if any hills are involved, since once the
battery has been used up its relying on the engine only and a 10 ton
(probably more) bus won't be going anywhere fast with an engine that
size.

B2003

"Boltar" wrote in message
ups.com...
On 6 Jul, 09:56, Adrian wrote:
February 2006.http://www.tfl.gov.uk/corporate/medi...ntre/3680.aspx

From the article:

"The battery pack is kept at optimum power by a 1.9 litre diesel Euro
IV engine. In other words, an engine which would normally be found in
a family car keeps the battery"

1.9 sounds a bit too small. I'm sure in start and stop traffic it
might be ok but ultimately the energy all comes from that engine.
Seems to me the bus would be hopeless for any long or even middle
distance runs especially if any hills are involved, since once the
battery has been used up its relying on the engine only and a 10 ton
(probably more) bus won't be going anywhere fast with an engine that
size.


Do the buses have regenerative braking as well?

Paul

Boltar ) gurgled happily, sounding much like they
were saying :

"The battery pack is kept at optimum power by a 1.9 litre diesel Euro
IV engine. In other words, an engine which would normally be found in
a family car keeps the battery"

1.9 sounds a bit too small. I'm sure in start and stop traffic it
might be ok but ultimately the energy all comes from that engine.
Seems to me the bus would be hopeless for any long or even middle
distance runs especially if any hills are involved, since once the
battery has been used up its relying on the engine only and a 10 ton
(probably more) bus won't be going anywhere fast with an engine that
size.

Don't forget that the engine is basically just being used as a generator,
therefore can run at optimum revs for the specific output - there's no
requirement for any kind of useful rev range or torque curve.

Boltar ) gurgled happily, sounding much like they
were saying :

I saw on TV not long ago something about Hybrid buses being used in
London - not those hopeless fuel cell things but a diesel engine
plus electric motor. Are these out and about yet?

February
2006.http://www.tfl.gov.uk/corporate/medi...ntre/3680.aspx

And double-deckers since November
2006.http://news.bbc.co.uk/1/hi/england/london/6102806.stm

Anyone know what routes?

sigh

From the first link...
The hybrids will operate on route 360, run by London Central, from
tomorrow, Wednesday, 8 February 2006.

From the second link...
When it returns to London it will operate on the route between Wood
Green and London Bridge.

On 6 Jul, 11:06, Adrian wrote:
Boltar ) gurgled happily, sounding much like they
were saying :

I saw on TV not long ago something about Hybrid buses being used in
London - not those hopeless fuel cell things but a diesel engine
plus electric motor. Are these out and about yet?
February
2006.http://www.tfl.gov.uk/corporate/medi...ntre/3680.aspx

And double-deckers since November
2006.http://news.bbc.co.uk/1/hi/england/london/6102806.stm
Anyone know what routes?

sigh

From the first link...

The hybrids will operate on route 360, run by London Central, from
tomorrow, Wednesday, 8 February 2006.

I had spotted it. That was 18 months ago however.


From the second link...

When it returns to London it will operate on the route between Wood
Green and London Bridge.

And that is the number what?

B2003

On 6 Jul, 11:05, Adrian wrote:
Don't forget that the engine is basically just being used as a generator,
therefore can run at optimum revs for the specific output - there's no
requirement for any kind of useful rev range or torque curve.

True , and I suppose that will mitigate it somewhat. However
ultimately that engine will produce less power than a normal bus
engine so when relying on the engine alone its going to be slower
compared to the normal engine running at optimum gearing.

B2003

Boltar ) gurgled happily, sounding much like they
were saying :

Don't forget that the engine is basically just being used as a
generator, therefore can run at optimum revs for the specific output
- there's no requirement for any kind of useful rev range or torque
curve.

True , and I suppose that will mitigate it somewhat. However
ultimately that engine will produce less power than a normal bus
engine so when relying on the engine alone its going to be slower
compared to the normal engine running at optimum gearing.

shrug
How often do bus engines require full power? Not very.

Don't forget that one thing electric motors are very good at is producing
large amounts of torque from rest.