Posted by =?iso-8859-1?Q?mark=5Fdigital= on May 29, 2006, 11:21 am
> "Michelle Steiner" wrote ...
>> "Bill" wrote:
>>> I've read here or in the Yahoo groups that extensive use of
>>> regenerative braking instead of mechanical braking will result in the
>>> build-up of rust on the drums and rotors.
>>
>> You don't have a choice under normal conditions; it uses regenerative
>> braking except for hard or panic stops and when the car is traveling
>> under six miles per hour. So every time you stop the car, you're using
>> mechanical brakes.
>>
> You can prevent use of both regenerative braking and compression braking
> by switching to "N" before stopping. I have only tried it at low speeds.
> Al
If neither is functioning, how do you stop your car? Throw it in reverse?
mark_
Posted by A Sherman on May 30, 2006, 2:59 am
>>
>> You can prevent use of both regenerative braking and compression braking by
>> switching to "N" before stopping. I have only tried it at low speeds.
>> Al
>>
>>
> If neither is functioning, how do you stop your car? Throw it in reverse?
> mark_
Use the mechanical brakes (of course).
By compression braking, I was referring to the ICE. I am just speculating
that the car would be coasting in N.
There is no question that MG1 will need to spin if the ICE is stopped and the
car is moving. I presume that when the car is in N, MG1 will just spin as
necessary with no electrical power in or out.
Al
Posted by =?iso-8859-1?Q?mark=5Fdigital= on May 31, 2006, 10:07 pm
>>>
>>> You can prevent use of both regenerative braking and compression braking
>>> by
>>> switching to "N" before stopping. I have only tried it at low speeds.
>>> Al
>>>
>>>
>>
>> If neither is functioning, how do you stop your car? Throw it in reverse?
>>
>> mark_
> Use the mechanical brakes (of course).
> By compression braking, I was referring to the ICE. I am just speculating
> that the car would be coasting in N.
> There is no question that MG1 will need to spin if the ICE is stopped and
> the
> car is moving. I presume that when the car is in N, MG1 will just spin
> as
> necessary with no electrical power in or out.
> Al
I misunderstood what you meant by compression braking because the engine is
not involved with slowing the car. Approx 10% of the kinetic energy is drawn
away, and explicitly so, to resemble the "feel" we're accustomed to with a
conventional car.
Hmmm. I probably just made matters worst.
Have a good day and enjoy your Prius.
Posted by A Sherman on June 1, 2006, 2:24 am
"mark_digital©" wrote
> I misunderstood what you meant by compression braking because the engine is
> not involved with slowing the car..........
> Have a good day and enjoy your Prius.
Thanks Mark, I do enjoy my Prius.
Your reply pointed out that I did not realize that MG2 ordinarily provides the
dynamic braking without involvement of the ICE.
Now that I am thinking about it, I assume that the ICE and MG1 must both be
involved in braking when in "B" mode. They both must provide retarding forces
(actually torques) that are apportioned by the power split device.
I was assuming that this use of MG! and the ICE would also happen during
"dynamic braking". Now I realize that this is unnecessary with dynamic
breaking provided by MG2. So here are new questions:
Do I understand this correctly?
Is MG1 and ICE "pumping" ever used for retarding in "D", or is it only used in
"B"?
Al
Posted by =?iso-8859-1?Q?mark=5Fdigital= on June 1, 2006, 3:49 pm
> "mark_digital©" wrote
>>
>> I misunderstood what you meant by compression braking because the engine
>> is not involved with slowing the car..........
>>
>> Have a good day and enjoy your Prius.
> Thanks Mark, I do enjoy my Prius.
> Your reply pointed out that I did not realize that MG2 ordinarily provides
> the dynamic braking without involvement of the ICE.
> Now that I am thinking about it, I assume that the ICE and MG1 must both
> be involved in braking when in "B" mode. They both must provide retarding
> forces (actually torques) that are apportioned by the power split device.
> I was assuming that this use of MG! and the ICE would also happen during
> "dynamic braking". Now I realize that this is unnecessary with dynamic
> breaking provided by MG2. So here are new questions:
> Do I understand this correctly?
> Is MG1 and ICE "pumping" ever used for retarding in "D", or is it only
> used in "B"?
> Al
I just went to a web site to get a better understanding and I can't see how
the engine can remain "hard connected" to the wheels, provide resistance and
all the while not suffer scored cylinder walls.
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>> "Bill" wrote:
>>> I've read here or in the Yahoo groups that extensive use of
>>> regenerative braking instead of mechanical braking will result in the
>>> build-up of rust on the drums and rotors.
>>
>> You don't have a choice under normal conditions; it uses regenerative
>> braking except for hard or panic stops and when the car is traveling
>> under six miles per hour. So every time you stop the car, you're using
>> mechanical brakes.
>>
> You can prevent use of both regenerative braking and compression braking
> by switching to "N" before stopping. I have only tried it at low speeds.
> Al