CVT control in vehicles.
Thread Starter
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Senior User
Joined: Sep 2004
Posts: 248
Likes: 0
CVT control in vehicles.
Hi,
For those of you with a good understanding of engines, and driving in general, or those of you who have experience with CVTs, I have some questions.
I want to know the relationships between between gear ratio, engine
speed, vehicle speed, and power requirement for vehicle with a CVT.
Now, imagine a car with a CVT that can shift up or down smoothly,
Do you think there are any situations where:
1. The engine rpm is rising, but the gear ratio is falling (from a
high gear to low gear) I guess this might happen if there is a great
power demand in place?
2. The engine rpm is constant, but gear ratio is falling.
3. The engine rpm is falling, and gear ratio is falling too. Any
ideas?
4. The engine rpm is rising, and gear ratio is rising too.
5. The engine rpm is constant, but gear ratio is rising.
6. The engine rpm is falling, but gear ratio is rising.
Any ideas?
I've never driven a vehicle with CVT. When it start up acceleration,
does the rpm of the engine stay constant and the gear ratio simply go
up?
Thanks
For those of you with a good understanding of engines, and driving in general, or those of you who have experience with CVTs, I have some questions.
I want to know the relationships between between gear ratio, engine
speed, vehicle speed, and power requirement for vehicle with a CVT.
Now, imagine a car with a CVT that can shift up or down smoothly,
Do you think there are any situations where:
1. The engine rpm is rising, but the gear ratio is falling (from a
high gear to low gear) I guess this might happen if there is a great
power demand in place?
2. The engine rpm is constant, but gear ratio is falling.
3. The engine rpm is falling, and gear ratio is falling too. Any
ideas?
4. The engine rpm is rising, and gear ratio is rising too.
5. The engine rpm is constant, but gear ratio is rising.
6. The engine rpm is falling, but gear ratio is rising.
Any ideas?
I've never driven a vehicle with CVT. When it start up acceleration,
does the rpm of the engine stay constant and the gear ratio simply go
up?
Thanks
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
SWAG:
===================
1- correct
2-foot off throttle engine idling coming to a stop
3-slowing down
4-acceleration
5-light acceleration near final speed
6-downhill
I have never driven a CVT equiped vehicle.
I would think the engine would try to stay in the peak torque band where it was most efficient under load. Rising only when power was needed and falling when power was not required. -Again a SWAG.
Why the interest in CVT's? You have several threads on the subject now.
===================
1- correct
2-foot off throttle engine idling coming to a stop
3-slowing down
4-acceleration
5-light acceleration near final speed
6-downhill
I have never driven a CVT equiped vehicle.
I would think the engine would try to stay in the peak torque band where it was most efficient under load. Rising only when power was needed and falling when power was not required. -Again a SWAG.
Why the interest in CVT's? You have several threads on the subject now.
