For Those Non Technical
#1
Hi There,
Could anybody please explain to be a little bit about when your car engine starts to det?
How do you know it is?, what causes it, what can you do to minimise it?
Also, what is a knock sensor, what is a Dawes?
I am simply asking these questions because I have an interest in Subaru's but dont have any technical knowledge.
Thanks to anybody who takes time out to explain the above to me, I appreciate it.
Michael
Could anybody please explain to be a little bit about when your car engine starts to det?
How do you know it is?, what causes it, what can you do to minimise it?
Also, what is a knock sensor, what is a Dawes?
I am simply asking these questions because I have an interest in Subaru's but dont have any technical knowledge.
Thanks to anybody who takes time out to explain the above to me, I appreciate it.
Michael
#2
Det is when the flame fronts hit each other (i.e. flames ignite too early). A Knock-link senses det (det is also know nas 'knock'), and lights up a series of LCD's to tell you of the situation, which then needs to be rectified (either by coming off throttle/boost, increasing the Octane of fuel used or retarding timing).
Octane is in some ways a rating of at which pressure the fuel will self-ignite, the higher the octane, the more it can be placed under pressure until it ignites - hence low octane rating can be a source of 'det' as the fuel is igniting in the combustion chambers too early (as pressure increases)
Octane is in some ways a rating of at which pressure the fuel will self-ignite, the higher the octane, the more it can be placed under pressure until it ignites - hence low octane rating can be a source of 'det' as the fuel is igniting in the combustion chambers too early (as pressure increases)
#3
Scooby Regular
Join Date: Nov 2000
Location: 32 cylinders and many cats
Posts: 18,658
Likes: 0
Received 1 Like
on
1 Post
Michael, if you have a read of my website I've included a load of info about knock there (scroll past all the info selling you stuff you've already bought ) I've also recommended some books on the topic.
Thread
Thread Starter
Forum
Replies
Last Post