Drive by wire = poop
Throttle by wire = poop
I’m buying a 1979 chevy truck. Fuck all this technology.
when will they learn, mechanical stuff almost never fails
Toyota sure is taking it in the ass lately.
Electric steering sucks.
drive by wire/throttle by wire is same thing. in my opinion i dont like it one bit. Yet it is needed for the fuel economy and packaging tight engines into small places. same way cars all have 6 speeds or more trannys. previous years you had 4 or 5 speed trannys w/ relatively shit ring and pinion gears like 2.xx or 3.xx to get mileage. Now manufactures can make a “sporty car” w/ 4.xx gears that accelerates quickly. But the 6th gear is overdriven beyond normal to get the efficiency. It is proven fact that you burn less fuel stomping the peddle and accelerating fast and getting to your desired mph and holding it than gradually speeding up to said mph and holding it.
as for the electronic steering-- that is a misnomer. The steering is still a mechanical rack/box. instead of having a hydraulic power steering pump they use servos on the rack or an external power steering pump that is not belt driven. The video looks like a pump that is on the fritz. No real big deal in my opinion. The car, despite the wheel shake, is not an immediate danger. I dont think there is any car that ever used a all electronic rack–i.e. the column is not physically connected to the steering box/rack. if there is someone please show me.
2 things i dont think we will ever see-- brakes that are completely electronic or electronic steering in the sense the steering column is not connected to the rack. Those two items need to be mechanical. They will intermix electronics with them–but in the end when the electronics fail the mechanical side is still there. think of abs where the abs pump died–but the brakes still work.
I can get my steering wheel to do that exactly if i hook up the lines backwards.
no technology needed, just stupidity
Sailor…Mercedes has been testing this technology (fully electronic brakes & steering) for at least 10 years. I believe they do/did have a fully electronic brake system in a production car. I remember reading about it a few years back.
They aint testing it if they don’t intend to use it.
Just a quick Google search - 1st one I found…
2002 SL500
Faster, Smarter Braking with World’s First Electronic Brake System
The company that invented ABS anti-lock brakes, traction control and ESP stability control will launch the world’s first production car equipped with an electronic brake system - which provides faster, more sure-footed brake response, especially in emergencies.
The brake pedal on the 2003 Mercedes-Benz SL works with a computer that tells four fast-acting valves exactly how hard to apply the brakes on each wheel. A backup hydraulic master cylinder comes into play only if there’s an electrical failure.
With split-second accuracy, the system can change brake pressure on each wheel over uneven surfaces and can even increase brake pressure on the outside wheels when braking in turns. If the driver switches his foot quickly from accelerator to brake pedal, the electronic brake system recognizes the early signs of an emergency and reacts instantly by raising hydraulic pressure and skimming the pads against the discs, which are applied with full force as soon as the brake pedal is pressed. At highway speeds, this pre-loading of the braking system reduces stopping distance by about three percent - enough to turn an accident into a close call. In addition, the system automatically senses wet conditions and indiscernibly applies the brakes just enough to keep the discs dry, so that brake operation is instant in the rain.
http://www.mercedes-benz.ca/index.cfm?NewsID=93&id=2959
http://www.mercedes-benz.ca/index.cfm?NewsID=91&id=2959
It does state that there is a hydraulic master cylinder for backup, but how long before they trust it that they do away with the mechanical backup?
It’s coming whether we like it or not.
x13412342134213421342134213412342134214214 but Im going to buy a chevy luv.
thats the thing–even when it was employed–the hydraulic unit was still maintained. no car company is stupid enough to build a car that could go on the fritz electronically and leave all steering of braking rendered useless. because the family of said person who wrecks the car due to electronic failure would then own the company. just from a litigation standpoint–it would be bad business for a company to do that.
calling the mercedes setup brake by wire is misleading. the system more or less monitors brake pedal stroke on the booster to try and decipher emergency situations. ultimatley it is tied in w/ the esp system.
here is a run down of the mercedes system–
The functions of the BAS brake booster (A7/7) are controlled using the components of the electrical/electronic system.
In model 168, the voltage supply for the BAS control unit (N48) is via the fuse and relay box (F1). In models 129 and 140 via the base module (N1 6/1). In models 163, 170, 202, 208, 210, 215, 220 via the relay module (K40). In models 203 and 209 via the SAM control unit (N 10/1
In all vehicles with engines 112, 113, 605, 606, 611, 612, 613 and ESP, the BAS control unit function is integrated in the ESP control unit (N47-5).
In models 163, 168, 203, 209, 215, 220 the BAS control unit function is integrated in the ESP control unit (N47-5).
The BAS control unit receives input signals from the following components:
* ME control unit (via CAN data line)
* Traction system control unit (via CAN data line)
* BAS diaphragm travel sensor
* BAS release switch
In the BAS control unit, the input signals are converted into output signals for the following components:
* BAS solenoid valve
* BAS/ESP indicator lamp (via CAN data line)
On the basis of the input signals, the BAS (N48) or ESP (N47-5) control unit decides which of the 3 operating modes
* Normal mode
* BAS pressure increase
* BAS pressure reduction is to be activated.
Normal operation
In this case, the brake application is not at the higher pedal speed (that requires activation of BAS). The solenoid valve in the BAS brake booster (A7/7) is de energized in the basic position.
The system is ready for braking.
Service brake and ABS function normally.
This mode is also set if there is a fault in the BAS.
BAS pressure increase
From the speed of the brake pedal, the BAS control unit (N48) recognizes that the preconditions exist for activation of BAS.
The BAS solenoid valve (A7/7y1) is activated by the BAS control unit (N48) and the brake booster produces the maximum brake assistance power.
BAS is activated when the following conditions exist simultaneously:
BAS pressure reduction
The BAS control unit (N48) receives information from the BAS release switch (A7/7s1) that the emergency brake application has terminated. The BAS solenoid valve (A7/7y1) is no longer activated and the maximum braking assistance force is switched off. The normal brake servo assistance remains unchanged.
BAS is switched off when one of the following conditions exists:
* Speed > 8 km/h
-
BAS release switch is actuated
-
no current fault is detected.
-
the system is enabled (after self-test)
-
Pedal speed activation threshold exceeded
- BAS release switch is not actuated
- Speed < 3 km/h
- Duration of activation >20 s
- If no signal from the stop light switch is present after activation of BAS
- A fault is detected that causes the BAS indicator lamp to be activated
lol
“I think” this shows what Lexus did for enhanced security. If the key code is not synced up correctly the steering wheel does go out of control making it literally impossible to drive away.