reading a Knock Sensor

[Bruce Plecan]

> >To have a current flow wouldn't it need two?<<

> Apparently not. Just one crystal in the KS.

?. Don't it ground to the block?.

> >> They respond to stress and vibration--so I gathered that
> >> the crystal actually is responding to "squeeze"-ing forces.
> Stress can happen without vibration thou<<.
> >Yes?<

> Ummm..Yes--stress can happen without vibration--that's where
> the squeeze comes in...gonna have to strip one down and
> microscope it...without splitting hairs, the engine KS is sensing
> vibration generated from noise.

My point exactly, in your first post you just mentioned squeeze the crystal
Bruce


>
> Lyndon.
>
>
> >> -----Original Message-----
> >> From: Bruce Plecan <nacelp at bright.net>
> >> To: gmecm at diy-efi.org <gmecm at diy-efi.org>
> >> Date: October 11, 2000 9:50 PM
> >> Subject: Re: reading a Knock Sensor
> >>
> >>
> >> >Wouldn't it be shaken or squeezed?
> >> >Bruce
> >> >
> >> >
> >> >----- Original Message -----
> >> >From: "Programmer" <nwester at eidnet.org>
> >> >To: <gmecm at diy-efi.org>
> >> >Sent: Monday, October 09, 2000 9:26 PM
> >> >Subject: Re: reading a Knock Sensor
> >> >
> >> >
> >> >> I thought the more you "squeezed" the crystal,
> >> >> the more voltage output ?
> >> >> Lyndon.
> >> >> -----Original Message-----
> >> >> From: Roger Heflin <rah at horizon.hit.net>
> >> >> To: gmecm at diy-efi.org <gmecm at diy-efi.org>
> >> >> Date: October 8, 2000 9:42 PM
> >> >> Subject: Re: reading a Knock Sensor
> >> >>
> >> >>
> >> >> >
> >> >> >
> >> >> >On Sun, 8 Oct 2000, Keith wrote:
> >> >> >
> >> >> >> I know i can get the Voltage but what does that convert to?? more
> >> >> >> voltage = more knock???
> >> >> >> how much is too much.?
> >> >> >> Thanks
> >> >> >> Keith
> >> >> >>
> >> >> >It does not convert.   The knock sensor is simply a microphone,
> >> >> >everything that determines if the noise is knock is in the
> >> >> >electronics.
> >> >> >
> >> >> >Most of the electronics just do filtering and measure the amount of
> >> >> >power in a certain frequencty band, and this supposely differs by
> >> >> >engine and placement of the sensor(s).
> >> >> >
> >> >> > Roger
> >> >> >
> >> >>
> >>
>
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