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Subject: Re: Dunce question

Date: 02/14/03 at 12:40 PM
Posted by: Brian Snell
E-mail: bsnell@lara.on.ca
Message Posted:

In Reply to: Re: Dunce question posted by andrew on 02/14/03 at 3:12 AM:

Hello Andrew. Re your query about switches actuated by the gear-selector. As another reader has pointed out, where is your fixed reference. If you wanted to just count the number of times the gear-selector was being actuated then O.K., but even with some system of counting the "up" shifts, then subtracting the "down" shifts, all it takes is one less-than-complete selector action, which may or may not change the gear, for the count to get screwed up. My query re internal switches was intended for possible mechanical integration somewhere where each individual switch would be "hard-on" for that particular gear selection. For this to be practical, as a retrofit to a production assembly, a great deal of mechanical work and ingenuity would be required plus a great dedication and desire to accomplish it. Electrically, such a system would certainly be simple, with the only possible problem being the difficulty in accessing the switches should fine-tuning of the actuation be required. However, as you point out, the internal environment precludes this option. I guess that some system of small pushrods actuating external switches could also be possible, where each pushrod is actuated from appropriate points in the mechanism. This could allow external switches, but there would be oil-sealing problems to be worked out and it would be unlikely that any or all gears would lend themselves to simple modification across the board. I can see a real nightmare with this scenario.

Let me know if you wish to take the sensor idea any further.



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