SEAT Ibiza - rwd turbo
Discussion
Podie said:
Firstly, really nice to meet you yesterday.
Incredible amount of data goes into these things - quite staggering to realise just how much work goes into a power steering pump!
Glad you've got the data you need, but should you need more, you know where to find me and the the citrus Focus
Incredible amount of data goes into these things - quite staggering to realise just how much work goes into a power steering pump!
Glad you've got the data you need, but should you need more, you know where to find me and the the citrus Focus
edc said:
Nice to check back in on this thread. I've still got the glass and electric window mechanisms from your car in my garage from nearly some 10 years ago 
!
Been a while eh! No idea where the last 10years has disappeared to ;-) !Spent a fun hr rolling around on the floor yesterday making brackets to hold the differential output shaft speed sensors:
One on each halfshaft output, means i can now log cross axle differential velocity into the Chassis Dynamics control module. Made life easy for myself using a signal generator to calibrate the input channels for these pulse sensors:
As usual, it's a balancing act between resolution, range, accuracy and noise rejection, so using a signal generator that can add "arbitary noise" to it's output makes the selection and calibration of noise rejection / smoothing digital filters much easier. Eventual aim to to use "brake steer" a-la mclaren as a yaw control parameter ;-)
Max_Torque said:
Due to space constraints with the tight engine packaging, i use a TRW Electrohydraulic PAS pump, "borrowed" from a Ford Focus ST. This runs into my GrpA Cossie steering rack (only 1.2 turns Lock to Lock).
The TRW pump takes vehicle and engine speed and handwheel rate over CAN, and changes it's pump speed to suit, and although i have had this working, i've never been happy with the way it responds in my car, with a steering system quite different from the original ST.
I know someone at TRW who works on EHPAS if you have any other queries on it I could ask, although no promises as some stuff he may not be allowed to answer. The TRW pump takes vehicle and engine speed and handwheel rate over CAN, and changes it's pump speed to suit, and although i have had this working, i've never been happy with the way it responds in my car, with a steering system quite different from the original ST.
Fastdruid said:
Max_Torque said:
Due to space constraints with the tight engine packaging, i use a TRW Electrohydraulic PAS pump, "borrowed" from a Ford Focus ST. This runs into my GrpA Cossie steering rack (only 1.2 turns Lock to Lock).
The TRW pump takes vehicle and engine speed and handwheel rate over CAN, and changes it's pump speed to suit, and although i have had this working, i've never been happy with the way it responds in my car, with a steering system quite different from the original ST.
I know someone at TRW who works on EHPAS if you have any other queries on it I could ask, although no promises as some stuff he may not be allowed to answer. The TRW pump takes vehicle and engine speed and handwheel rate over CAN, and changes it's pump speed to suit, and although i have had this working, i've never been happy with the way it responds in my car, with a steering system quite different from the original ST.
Pretty much the only think i don't know is the CAN protocol to reflash/code the pump module to change it's internal characteristic maps. However, as i use my chassis dynamics module to drive the unit (send it commands over CAN) i can effectively modify the units response by sending it modified data. ie, if i want more assistance vs vehicle speed, i just send it a lower than true vehicle speed and vise versa ;-)
Ok, every car, no matter how well designed & built has gotta have a bodge somewhere. Well, here's mine:
Yup^^^ that horrible mess of brackets and mounts is the cough, MOT, cough mechanical handbrake system. Mounted on the differential input shaft it's a brembo mech handbrake caliper clamping a custom "disc". I've not decided what i'm going to actuate it with yet, either just a std lever mounted on the sill side of the drivers seat but possibly with an electronic actuator to avoid having to sort out the cable run into the cabin etc.
Luckily, you can't see it normally as it's hidden between diff and gearbox:
(there's a proper "flyoff" hydraulic handbrake to use for turning round duties....... ;-)
Yup^^^ that horrible mess of brackets and mounts is the cough, MOT, cough mechanical handbrake system. Mounted on the differential input shaft it's a brembo mech handbrake caliper clamping a custom "disc". I've not decided what i'm going to actuate it with yet, either just a std lever mounted on the sill side of the drivers seat but possibly with an electronic actuator to avoid having to sort out the cable run into the cabin etc.
Luckily, you can't see it normally as it's hidden between diff and gearbox:
(there's a proper "flyoff" hydraulic handbrake to use for turning round duties....... ;-)
PhillipM said:
Max_Torque said:
I'll put kettle on while you lot get started then....... ;-)
Congratulations, you just volunteered to be official Tea b
h™ of the ensemble.
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