[Question] 4age20v throttle opener

[me2kimi]

Hi all sifu and all fellow forumers.

What is the purpose of this thing and how it work? Coz my observation of my car, when engine on(vacuum applied) the rod will be lowered (move further) from throttle stopper.

 

[levin818]

auto choke

 

[cuscostrutbrace]

not auto choke...hehe

 

[me2kimi]

auto choke

I thought ISCV act as auto choke

not auto choke...hehe

Then what's the function of this thing?

 

[D7zul]

The 2nd auto choke?

 

[levin818]

When vacuum is absent, the opener will push the 4 butterfly to open a little bit. This is similar to lightly press on the throttle. So when the moment we start the engine, the rpm surge to 2500rpm.
When vacuum is present (engine started), the vacuum will suck down the opener's rod and the 4 butterfly will be at completely closing position. At this point (idling), the engine breath through ISCV. This explain why after start the engine, the rpm will move down to 800~1000rpm.
So its similar to auto choke, right?

 

[levin818]

Brape markah sy dpt, cikgu-cikgu sekalian?
(what is my score, teacher?)

 

[D7zul]

Brape markah sy dpt, cikgu-cikgu sekalian?
(what is my score, teacher?)

hahaha.. who's the teacher ?

i thought u are :tongue:

 

[me2kimi]

When vacuum is absent, the opener will push the 4 butterfly to open a little bit. This is similar to lightly press on the throttle. So when the moment we start the engine, the rpm surge to 2500rpm.
When vacuum is present (engine started), the vacuum will suck down the opener's rod and the 4 butterfly will be at completely closing position. At this point (idling), the engine breath through ISCV. This explain why after start the engine, the rpm will move down to 800~1000rpm.
So its similar to auto choke, right?

Becoz of no answer from the others, so you will get an A**.
Keep up good work..