2020-10-11, 18:07
So I was thinking about the "best" (automatic / two-pedal) transmission.
Lots of automatic transmission out there are equiped with a torque converter. This will continuesly send some power to the wheel when its in gear, the driver can hold the car in place by pressing the brake pedal. My car (Toyota corolla yay) does this too, and i'm used to it. It can come in handy when you need to park it slowly, even more on an uneven surface-> "One foot parking".
So nowadays you see the double clutch transmission automatics, which usually have a "creep" function when you let go off the brake in gear. Same goes for some of the semi-automatics. Its seems manufactors have this programmed into the transmissioncomputer thing. Maybe so it "behaves like a traditional automatic"?
However, the problem (or my "autistic" problem, if you wanna call it that way) is a matter of principle: A car should not be able to move without the driver making it. In gear, the "default" action of the car (without the driver doing anything) is crawling forward at around 5-8kmh. This somehow grinds my gears (get it?).
But,
There is an alternative. Not all semi-automatics (or automated manuals) have a creep function. For example older Smart Fortwo's don't creep, also Alfa/Fiats "Selespeed" transmission doesn't creep. Also trucks/semi's/coachbusses with automated manuals usually don't creep. They go when the driver presses the "go"pedal. This seems more logic to me, in principle.
However, the downside of this, is that without a hill-hold/brake-hold function on an semi-automatic, the vehicle can move backward/forward if its on a slope, and you let go of the brake. Imagine being in Drive, standing at an incline hill, and the light turns green, you let go of the brake and immediately the vehicle starts rolling backwards.
When switching from the brake to the gaspedal, its like a "dead point". Like, for a second, the vehicle is not being held still by brakes, nor is it being pushed by the engine to move in a direction the drivers want, it simply is left to the laws of nature.
A solution would be a brake hold system that will not only hold the vehicle in place, but also when you come to a stop by just rolling it out (poor english), i mean you dont press the brake pedal, you just let it come to a stop like on a uphill section, the brake hold system will also kick in to prevent it from rolling back. (if im not mistaking the BMW i3 has some sort of principle build in. It doesnt creep in gear, but the car will prevent it from going the opposite direction of the gear its in)
So lets go back to cars I can afford, without any hillhold system. Is there any reason/arguments/situation that I am forgetting to choose the creep-automatic or the noncreep-automatic?
Please let me know your thoughts!
Lots of automatic transmission out there are equiped with a torque converter. This will continuesly send some power to the wheel when its in gear, the driver can hold the car in place by pressing the brake pedal. My car (Toyota corolla yay) does this too, and i'm used to it. It can come in handy when you need to park it slowly, even more on an uneven surface-> "One foot parking".
So nowadays you see the double clutch transmission automatics, which usually have a "creep" function when you let go off the brake in gear. Same goes for some of the semi-automatics. Its seems manufactors have this programmed into the transmissioncomputer thing. Maybe so it "behaves like a traditional automatic"?
However, the problem (or my "autistic" problem, if you wanna call it that way) is a matter of principle: A car should not be able to move without the driver making it. In gear, the "default" action of the car (without the driver doing anything) is crawling forward at around 5-8kmh. This somehow grinds my gears (get it?).
But,
There is an alternative. Not all semi-automatics (or automated manuals) have a creep function. For example older Smart Fortwo's don't creep, also Alfa/Fiats "Selespeed" transmission doesn't creep. Also trucks/semi's/coachbusses with automated manuals usually don't creep. They go when the driver presses the "go"pedal. This seems more logic to me, in principle.
However, the downside of this, is that without a hill-hold/brake-hold function on an semi-automatic, the vehicle can move backward/forward if its on a slope, and you let go of the brake. Imagine being in Drive, standing at an incline hill, and the light turns green, you let go of the brake and immediately the vehicle starts rolling backwards.
When switching from the brake to the gaspedal, its like a "dead point". Like, for a second, the vehicle is not being held still by brakes, nor is it being pushed by the engine to move in a direction the drivers want, it simply is left to the laws of nature.
A solution would be a brake hold system that will not only hold the vehicle in place, but also when you come to a stop by just rolling it out (poor english), i mean you dont press the brake pedal, you just let it come to a stop like on a uphill section, the brake hold system will also kick in to prevent it from rolling back. (if im not mistaking the BMW i3 has some sort of principle build in. It doesnt creep in gear, but the car will prevent it from going the opposite direction of the gear its in)
So lets go back to cars I can afford, without any hillhold system. Is there any reason/arguments/situation that I am forgetting to choose the creep-automatic or the noncreep-automatic?
Please let me know your thoughts!