RK
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| posted on 13/3/10 at 04:32 PM |
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clutch switch for starter
I assume a relay will be required. Does anyone have ideas on how this may be achieved without wrecking the relay after a few gear shifts?
Example 1:
85 Switched +ve (fuel pump switch, instruments etc)
86 clutch switch on to (-)
30 Ignition live (always ON)
87 Starter button on to starter and (-)
Problem: Relay will burn out as it is engaged every time you shift gears.
Example 2:
85 Switched +ve
86 (-) Earth
30 Ignition +ve always ON
87 Clutch Switch on to (-)
Problem: clutch switch is small and can't have a huge wire with lots of A going into it.
Any ideas?
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Mal
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| posted on 13/3/10 at 04:42 PM |
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Use a latching relay that stays on until the ignition switch is turned off.
You can make an ordinary relay latch by feeding the +12v side of the relay coil by the clutch pedal switch and an output from one of the relay
contacts.
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RK
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| posted on 13/3/10 at 04:58 PM |
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sorry I don't understand. Can you draw it or indicate what relay number goes where? Thank you!
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MakeEverything
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| posted on 13/3/10 at 05:00 PM |
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quote:
Originally posted by RK
I assume a relay will be required. Does anyone have ideas on how this may be achieved without wrecking the relay after a few gear shifts?
Example 1:
85 Switched +ve (fuel pump switch, instruments etc)
86 clutch switch on to (-)
30 Ignition live (always ON)
87 Starter button on to starter and (-)
Problem: Relay will burn out as it is engaged every time you shift gears.
How long do you intend on making your gear shifts????
It wont burn out, as its only a momentary action which is what relays are designed for.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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RK
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| posted on 13/3/10 at 05:05 PM |
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ok i'll believe you! thanks again everyone.
Rich
ps just fulfilling my role as site humourist, as everything I do turns into a Mr Bean episode.
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adithorp
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| posted on 13/3/10 at 05:10 PM |
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From your previous thread I'd say Ex2 is wrong. The whole point of the relay is that your clutch switch won't take the load of the starter
solenoid.
Ex1 is how you want it. The switching coil (term's 85-86) will be energised (low load) with every gearchange but there will only be current
across the switched terminals (30-87) when the starter button is also pressed.
adrian
[Edited on 13/3/10 by adithorp]
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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cosmick
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| posted on 13/3/10 at 05:55 PM |
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you seem to be making this problem very complicated. Take a look at any Suzuki wiring diagram for a Motorcycle. the clutch is required to be pulled in
to start the engine. all you need to do is run a wire to the clutch switch from the earth side of the relay. the the other wire coming out of the
clutch switch goes to earth.
Now the starter will only engage with the clutch pedal pressed. the starter will only operate when you turn the key. so there will be no burning out
of any relay and it will satisfy your requirements.
Cosmick
If it can't be fixed with a hammer then its probably an electrical problem.
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matt_claydon
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| posted on 13/3/10 at 06:50 PM |
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The realy should be good for plenty of cycles. However, if you don't want it to actuate every time you cahnge gear, the solution is simple:
Have the clutch switch and starter button/key switch wired in series to the relay coil, so that the relay only actuates when both are closed. The
other side of the relay simply completes the circuit to the starter solenoid without any other switches in that circuit.
[Edited on 13/3/10 by matt_claydon]
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RK
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| posted on 13/3/10 at 11:35 PM |
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Although you lost me completely by the end, my problem is not wiring now, it's how to get the switch to mount securely. It keeps wanting to
twist off the pedal itself.
I have also discovered a brake fluid leak going to the rear, which is next to impossible to reach as it's in the tunnel. You do learn a lot on
these things don't you? I can honestly say that 7 years straight of university is easier on the nerves.
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