Tech Drive by Wire

Minkster · 19th June 2007, 09:59

I've read quite a bit about the Civic having 'drive by wire' throttle.

Is this something on every new car these days?

cylon2007 · 19th June 2007, 10:30

Not all new cars have it yet but I'm sure they will eventually

Copycat · 19th June 2007, 10:38

It's required for the cruise control to operate properly.

I'm not sure if it serves some other purpose.

Kremmen · 19th June 2007, 10:41

My last 2 cars have been DBW and the most significant thing I have noticed is the instant response from the throttle.

You need to have a very light foot for a slow smooth getaway otherwise too much pressure can cause lurching, especially in slow moving traffic.

Pottsy · 19th June 2007, 10:51

DBW allows the ECU to make changes to the actual throttle position, compared to the pedal position. So this includes:

VSA actions
Non linearity in pedal response
Cruise control (though the old cable system worked very well too)
Speed of application at certain revs

The ECU needs to see the throttle position anyway, so it also seems unnecessary to have a cable as well.

http://en.wikipedia.org/wiki/Electro...rottle_control

Minkster · 19th June 2007, 11:56

I suppose I was just wondering how unique it was at the moment in the Civics class (which I guess means Focus, Astra, Golf, A3, Octavia etc)

Pottsy · 19th June 2007, 11:58

I can't imagine that there's a car in its class without it....

Minkster · 19th June 2007, 14:03

thats what i was thinking, but looking on various websites/reviews it seemed to make a big deal over the 'drive by wire' on the Civic for some reason

Oh well.

Nick7 · 23rd June 2007, 19:25

Well, on Civic there's quite a lot of lag due to DBW system (1.8 petrol).
On one side it offers more smoother ride: try to punch throttle fast, and leave it - no 'lurching', compared to 'old' system, like Civic 6th gen.

WavyD · 23rd June 2007, 23:09

DBW should make no difference to the drive, with regard to lag. The only difference is that the throttle is connected to the ECU, which then sends out all of the signals. The theory is that the ECU knows the engine state at all times and can make allowances for air and engine temperature etc. Instead of the throttle doing its thing and then the ECU having to play catchup and make allowances for everything else. Maybe you have a faulty sensor on your system if you suffer lag on a petrol!
I have a Vauxhall Vivaro (Renault/Nissan) Diesel Van that has DBW and its fantastic. The Van does suffer from a lot of Turbo Lag at take off, but that is down to bad Mapping more than DBW. I do love the Vans 6 speed gearbox though.

PTR · 24th June 2007, 01:03

Quote:

Originally Posted by Nick7

Well, on Civic there's quite a lot of lag due to DBW system (1.8 petrol).

ok it's not that direct like the old system (without dbw) but I can tell you that the 1.8 petrol has one of the fastest dbw I have ever driven.
(as part of my job) I have driven a lot of cars and 98% precent of them have ***** pedal responses compared to the Civ.
(for ex. Vauxhalls there is no throttle response at all!

)
other cars response is very very very slow, the Civ responses very well in some cases too good, then it jerks a bit but if you drive it smoothly there's no problem at all!

Power_of_Dreams · 24th June 2007, 15:03

drive by wire should be on every car!

i want fly-by-wire clutch

19th June 2007, 09:59	#1 (permalink)
Minkster Locking Wheelnut Join Date: 31st May 2007 Location: Grantham, UK Posts: 124 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Drive by Wire I've read quite a bit about the Civic having 'drive by wire' throttle. Is this something on every new car these days?

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This thread is about: Drive by Wire, it's in Engines and Transmission at the Honda Civic forum Civinfo; I've read quite a bit about the Civic having 'drive by wire' throttle. Is this something on every new car these days?...

19th June 2007, 10:30	#2 (permalink)
cylon2007 Triangular Exhaust Join Date: 14th April 2007 Location: South Manchester/North Cheshire Posts: 482 Thanks: 0 Thanked 2 Times in 2 Posts iTrader: (0)	Not all new cars have it yet but I'm sure they will eventually

19th June 2007, 10:38	#3 (permalink)
Copycat Galaxy class starship Rocketship door handle Join Date: 5th May 2006 Location: Helsinki, Finland Posts: 1,050 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	It's required for the cruise control to operate properly. I'm not sure if it serves some other purpose.

19th June 2007, 10:41	#4 (permalink)
Kremmen Krem de la Krem Civinfo guru Join Date: 7th January 2007 Location: West London Posts: 2,634 Thanks: 8 Thanked 11 Times in 11 Posts iTrader: (0)	My last 2 cars have been DBW and the most significant thing I have noticed is the instant response from the throttle. You need to have a very light foot for a slow smooth getaway otherwise too much pressure can cause lurching, especially in slow moving traffic.

19th June 2007, 10:51	#5 (permalink)
Pottsy Administrator Civinfo master Join Date: 10th April 2006 Location: Leics Posts: 5,090 Thanks: 18 Thanked 111 Times in 64 Posts iTrader: (0)	DBW allows the ECU to make changes to the actual throttle position, compared to the pedal position. So this includes: VSA actions Non linearity in pedal response Cruise control (though the old cable system worked very well too) Speed of application at certain revs The ECU needs to see the throttle position anyway, so it also seems unnecessary to have a cable as well. http://en.wikipedia.org/wiki/Electro...rottle_control

19th June 2007, 11:56	#6 (permalink)
Minkster Locking Wheelnut Join Date: 31st May 2007 Location: Grantham, UK Posts: 124 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	I suppose I was just wondering how unique it was at the moment in the Civics class (which I guess means Focus, Astra, Golf, A3, Octavia etc)

19th June 2007, 11:58	#7 (permalink)
Pottsy Administrator Civinfo master Join Date: 10th April 2006 Location: Leics Posts: 5,090 Thanks: 18 Thanked 111 Times in 64 Posts iTrader: (0)	I can't imagine that there's a car in its class without it....

19th June 2007, 14:03	#8 (permalink)
Minkster Locking Wheelnut Join Date: 31st May 2007 Location: Grantham, UK Posts: 124 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	thats what i was thinking, but looking on various websites/reviews it seemed to make a big deal over the 'drive by wire' on the Civic for some reason Oh well.

23rd June 2007, 19:25	#9 (permalink)
Nick7 Supporter Triangular Exhaust Join Date: 10th August 2006 Location: Croatia Posts: 451 Thanks: 0 Thanked 1 Time in 1 Post iTrader: (0)	Well, on Civic there's quite a lot of lag due to DBW system (1.8 petrol). On one side it offers more smoother ride: try to punch throttle fast, and leave it - no 'lurching', compared to 'old' system, like Civic 6th gen.

23rd June 2007, 23:09	#10 (permalink)
WavyD Triangular Exhaust Join Date: 24th May 2007 Location: Between the Light of Day and the Shadows of Darkness! Posts: 375 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	DBW should make no difference to the drive, with regard to lag. The only difference is that the throttle is connected to the ECU, which then sends out all of the signals. The theory is that the ECU knows the engine state at all times and can make allowances for air and engine temperature etc. Instead of the throttle doing its thing and then the ECU having to play catchup and make allowances for everything else. Maybe you have a faulty sensor on your system if you suffer lag on a petrol! I have a Vauxhall Vivaro (Renault/Nissan) Diesel Van that has DBW and its fantastic. The Van does suffer from a lot of Turbo Lag at take off, but that is down to bad Mapping more than DBW. I do love the Vans 6 speed gearbox though.

24th June 2007, 15:03	#12 (permalink)
Power_of_Dreams Wheelnut Join Date: 7th January 2007 Location: Swindon Posts: 95 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	drive by wire should be on every car! i want fly-by-wire clutch