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.
"mark_digital©" wrote
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.
The engine is not "hard connected" to the wheels. I think one of the better explanations is at:
The hydraulic part works just fine regardless of the gear. As for 'compression braking' or engine braking, it is of limited use until "B" is engaged.
Bob Wilson
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