TPS battery modification

[100milesaway]

the tyre sensor on the gtr is the "direct system type" and in cars the batterys are designed to last 10 years so kawasaki need to take their chicken design back to the drawing board my car uses an indirect system but doesn't actually measure the tire pressure. It uses the wheel speed sensor which is part of the ABS system to measure very minute differences in rotational speed between all four tires. When it senses a difference from what a nominally good tire is, it will turn on the tire pressure light. but you will need to check the tire pressure in all tires, as it doesn't indicate which tire is the problem. Once the tire pressure is adjusted and all tyres are inflated to the correct pressure you reset the system by simple holding the control button in on the dash for more than 3 seconds it's a simple but very efficient way of monitoring tyre pressure and is maintenance and cost free

EH!!!

[2kwacks]

EH!!!

geoff it's really simple to understand there are 2 types of tyre sensor systems, the "direct system" that is similar to whats used on the gtr and in some cars, and the "indirect system" which is the type that is used on my ford focus titanium model which users the a.b.s system, I'm simple pointing out that the "indirect system" dose excatly what it say's on the tin... lets you know if your tyres loose any air pressure and this system is maintenance free

[100milesaway]

geoff it's really simple to understand there are 2 types of tyre sensor systems, the "direct system" that is similar to that whats used on the gtr and in some cars, and the "indirect system" which is the type that is used on my ford focus titanium model which users the a.b.s system, I'm simple pointing out that the "indirect system" dose excatly what it say on the tin... lets you know if your tyres loose any air pressure and are maintenance free

Yes I knew THAT.                             BUT             I just thought I'd be a bit daft 

[2kwacks]

Yes I knew THAT.                             BUT             I just thought I'd be a bit daft 

now.. now .. geoff  nice try   but we all know, you never had a "scooby doo"  as in clue...  just in case you never knew what the meant either what the hell I was on about

[O.C.]

I use my TPS as a guide or monitoring device only.

Its wise to check tyre pressures with a calibrated gauge before riding.................like we used to do in days gone by 

[mecki]

the tyre sensor on the gtr is the "direct system type" and in cars the batterys are designed to last 10 years so kawasaki need to take their chicken design back to the drawing board my car uses an indirect system but doesn't actually measure the tire pressure. It uses the wheel speed sensor which is part of the ABS system to measure very minute differences in rotational speed between all four tires. When it senses a difference from what a nominally good tire is, it will turn on the tire pressure light. but you will need to check the tire pressure in all tires, as it doesn't indicate which tire is the problem. Once the tire pressure is adjusted and all tyres are inflated to the correct pressure you reset the system by simple holding the control button in on the dash for more than 3 seconds it's a simple but very efficient way of monitoring tyre pressure and is maintenance and cost free

You seem t6o forget that your car has 4 wheels and your bike only 2. 

[2kwacks]

You seem t6o forget that your car has 4 wheels and your bike only 2. 

dam.. and double dam!! so that's why when I stop on the bike, I need to put at least foot on the ground.. doh! and your point is?  I'm simple pointing out that the kawasaki t.p.s system could have been better designed, I also pointed out that my car use's the a.b.s system to inform me when air pressure is lost in either of the "four tyres" which works fine and dosen't require batteries. but thanks for pointing out the difference between the motor car and motorcycle I thought the only difference was with the motor car is..  you never got wet when it rained   H0! and the steering wheel

[100milesaway]

dam.. and double dam!! so that's why when I stop on the bike, I need to put at least foot on the ground.. doh! and your point is?  I'm simple pointing out that the kawasaki t.p.s system could have been better designed, I also pointed out that my car use's the a.b.s system to inform me when air pressure is lost in either of the "four tyres" which works fine and dosen't require batteries. but thanks for pointing out the difference between the motor car and motorcycle I thought the only difference was with the motor car is..  you never got wet when it rained   H0! and the steering wheel

Now now David            calm down

[mecki]

dam.. and double dam!! so that's why when I stop on the bike, I need to put at least foot on the ground.. doh! and your point is? 

My point is that what works on your car with 4 same size tyres doesn't necessarily work on a bike with 2 different size tyres. 

[doebag]

But surely the system is also comparing relative rolling diameters?Not just individual diameters.
So even if you had a trail type bike with a 21" front and a 17" rear, the system would know the diameters and constantly compare them, it would recognise when that relationship was altered.

[alibx11]

Mecki's reasoning is correct here, not possible to use the same system on bikes with possibly different size rims at the front and back never mind different profile tyres and also when the bike is lent over during cornering giving a different sensor reading that would not enable the ABS type sensors to work.

The ABS sensor system only works by counting the revolutions of the tyres and applying the warning light if one tyre is reading a different rpm than the other 3 over a set distance. it cannot tell what pressure is in the tyres!
If you set all the tyres at 20psi and reset the system it would assume that was normal, my car has the same system and seems to bring the warning on when there is a difference of about 10psi.

That said it must be possible to create a self charging unit using kenetic energy from the rolling motion cheaper than the existing price of the sensors, they can make it in watches that never need wound up and casio make solar powered watches which never need batteries, although they may me a lower voltage than the 3v batteries in our TPS's but the technology is already there.

Although it may be annoying having the low battery warning come on I'm afraid it won't bother me to the point of taking the tyres off to replace the batteries, think it will have to wait till tyre change time...

[2kwacks]

My point is that what works on your car with 4 same size tyres doesn't necessarily work on a bike with 2 different size tyres. 

of course not... but I obviously meant the same principle of using the "indirect system" on the a.b.s pick up sensor on a motorcycle front and rear wheel "separately"   thus...  sending "indivdual" front and rear tyre pressure information to the rider!

[alibx11]

The abs type sensor system doesn't send pressure information anywhere Dave, it calculates a change in rpm as a result of a change in tyre circumference due to lower pressure in the tyre.

[2kwacks]

The abs type sensor system doesn't send pressure information anywhere Dave, it calculates a change in rpm as a result of a change in tyre circumference due to lower pressure in the tyre.

  I gree...   but it can still inform the rider of low tyre pressure. I was simple pointing out there's more than one way to skin a cat what ever way the dam signal is sent


anyway.. bollocks to this I've got more important things to be getting on with like sorting out my sock drawer

[mecki]

That said it must be possible to create a self charging unit using kenetic energy from the rolling motion cheaper than the existing price of the sensors, they can make it in watches that never need wound up and casio make solar powered watches which never need batteries, although they may me a lower voltage than the 3v batteries in our TPS's but the technology is already there.

I was thinking the same. Piezoelectric crystals come to mind.
Even replaceable batteries would be preferable, but I guess they make more money selling us new TPS units every couple of years.