strut tower brace
Super Moderator
Joined: May 2001
Posts: 11,851
Likes: 2
From: Rancho Palos Verdes, CA
Vehicle: 2008 Toyota Prius 2006 Suzuki SV650S
QUOTE
Originally posted by skierd:
So THATS what that thingy is, a knock sensor. Why the hell is it up there, and not closer to engine?
So THATS what that thingy is, a knock sensor. Why the hell is it up there, and not closer to engine?
That is not a knock sensor, it is an inertia sensor. The Knock sensor is mounted on the engine.
The ECU uses the inertia sensor to tell when you just hit a bump vs the engine detonating.
See Iago's post above for the full detailed description.
[ December 17, 2001: Message edited by: Random ]
Senior Member
Joined: May 2001
Posts: 2,083
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QUOTE
Originally posted by Iago:
The sensor on the tower brace is actually a comparison sensor for the ECU. This one is listening to the ambient road noise being transmitted through the suspension to the body frame, engine, and everything else connected to it. The ECU uses this as a filter against what the primary knock sensor on the engine block is reading. When you hit a seam in the road, both sensors are going to pick up the "thump." The ECU sees that both sensors registered the noise, and can ignore it because it now knows the engine wasn't knocking. If the engine *was* knocking, then only the sensor on the block would pick up the noise, and then the ECU could respond accordingly.
The sensor on the tower brace is actually a comparison sensor for the ECU. This one is listening to the ambient road noise being transmitted through the suspension to the body frame, engine, and everything else connected to it. The ECU uses this as a filter against what the primary knock sensor on the engine block is reading. When you hit a seam in the road, both sensors are going to pick up the "thump." The ECU sees that both sensors registered the noise, and can ignore it because it now knows the engine wasn't knocking. If the engine *was* knocking, then only the sensor on the block would pick up the noise, and then the ECU could respond accordingly.
::SIGH:: rolleyes.gif
Super Moderator
Joined: May 2001
Posts: 11,851
Likes: 2
From: Rancho Palos Verdes, CA
Vehicle: 2008 Toyota Prius 2006 Suzuki SV650S
QUOTE
Originally posted by Iago:
A related question....anyone know what torque the bolts connecting the brackets to the aluminum brace should be tightened to?
A related question....anyone know what torque the bolts connecting the brackets to the aluminum brace should be tightened to?
QUOTE
Originally posted by Random:
Yes, you need to torque down the bolts on the strut tower to 29-36 ft lbs.
Yes, you need to torque down the bolts on the strut tower to 29-36 ft lbs.
*sigh*
QUOTE
Originally posted by Brendan:
no no it needs 45 NM, oh wait that is 29-36 ft-lbs, never mind.
no no it needs 45 NM, oh wait that is 29-36 ft-lbs, never mind.
*double sigh*
[ December 18, 2001: Message edited by: Random ]