Author Topic: oil dilution for direct injection  (Read 6282 times)

culzean

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Re: oil dilution for direct injection
« Reply #15 on: May 03, 2019, 10:20:46 AM »
Wikipedia has a section on Honda advanced technology, including this quote under the Earth Dreams sub-heading for 1.3 to 1.5 litre engines: "Employs VTC, direct injection technology and the Atkinson cycle using the DOHC, VTEC technologies as the base. Extensive friction reduction measures have been implemented."
Yes, but not together on both engines.

You just need to find out where the injectors are on your engine, if they are in the manifold it is normal port injection but if they are in the centre of combustion chamber with a solid ( high pressure ) pipe linking them then it will be direct injection,  if direct injection the engine will have a high pressure engine driven pump and also probably an engine driven vacuum pump to ensure brakes work when manifold vacuum is low.

https://www.counterman.com/gasoline-direct-injection-vs-port-fuel-injection/
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

proxsteel

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Re: oil dilution for direct injection
« Reply #16 on: May 03, 2019, 10:54:47 AM »
Look like this in Honda fit/jazz earthdreams engine..my friend got this car and yes the oil smells gas...my old one also smells gas but not that terrible as the new model..

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jazzaro

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Re: oil dilution for direct injection
« Reply #17 on: May 03, 2019, 12:13:27 PM »
You just need to find out where the injectors are on your engine, if they are in the manifold it is normal port injection but if they are in the centre of combustion chamber with a solid ( high pressure ) pipe linking them then it will be direct injection,  if direct injection the engine will have a high pressure engine driven pump and also probably an engine driven vacuum pump to ensure brakes work when manifold vacuum is low.
Sure.
1.3 engine has port fuel injection but it works as Atkinson cycle (LIVC, late intake valve closure), so there is a vacuum pump (driven by a camshaft) for brake vacuum assistance.

Basil

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Re: oil dilution for direct injection
« Reply #18 on: May 18, 2021, 06:49:13 PM »
I've just found a site called www.auto-date.net that shows the 1.3 engine changing from multi-point indirect injection to direct injection in the 2017 facelift, not sure if it's correct ?

https://www.auto-data.net/en/honda-jazz-iii-1.3-i-vtec-102hp-22475

https://www.auto-data.net/en/honda-jazz-iii-facelift-2017-1.3-i-vtec-102hp-32643
 

jazzaro

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Re: oil dilution for direct injection
« Reply #19 on: May 18, 2021, 08:30:30 PM »
I've just found a site called www.auto-date.net that shows the 1.3 engine changing from multi-point indirect injection to direct injection in the 2017 facelift, not sure if it's correct ?

https://www.auto-data.net/en/honda-jazz-iii-1.3-i-vtec-102hp-22475

https://www.auto-data.net/en/honda-jazz-iii-facelift-2017-1.3-i-vtec-102hp-32643
Incorrect infos.
The GK3 1.3 has definetly port injection, pre and post facelift.
Even in the JDM Mk4 (not imported in Europe) there is still a port injection system.

E27006

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Re: oil dilution for direct injection
« Reply #20 on: May 19, 2021, 05:30:15 AM »
The Scotty Kilmer video is worth your attention.
Note the reference to the Toyota dual injection system, indirect and direct injection on the same engine.
Toyota  employ both  conventional indirect injection into the inlet manifold where the fuel sprays the inlet valves washing them clean of carbon buildup,  , and also  direct injection into the cylinder for power and economy.
 The ECU must be switching to and from indirect to direct injection to suit the driving conditions of the car, the system of Toyota gives the benefit of ,  indirect to clean the inlets,  direct for economy.
Do Honda use a dual system? I am suspecting  not.
Note oil dilution, the engine needs work ,  driving with the engine oil at full working temperature ,   to burn off the petrol in the oil,   Americans are notorious for short trips in their cars, 250 yards to the shop, Walk? No I'll take the car. Is this the cold oil diluting condition Honda refers to?
The software fix, what are the details?

« Last Edit: May 19, 2021, 06:07:46 AM by E27006 »

Derkie54

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Re: oil dilution for direct injection
« Reply #21 on: May 19, 2021, 03:54:28 PM »
I asked whether the 1.3 was direct injection some time ago and the replies were as follows :

https://clubjazz.org/forum/index.php?topic=12119.msg83508#msg83508

It will be alright in the end, if it's not alright then it's not the end !

E27006

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Re: oil dilution for direct injection
« Reply #22 on: May 20, 2021, 08:32:25 PM »
https://hondanews.eu/gb/en/cars/media/pressreleases/125475/2018-honda-jazz-15-i-vtec
They talk about the 1.5 direct injection, but nothing about the 1.3 who appears unchanged, consumption data apart (but there's been the change from NEDC to WLTP).
Moving from indirect to direct fuel injection is not so easy, it means a deep change in an engine head. Honda knows how to do it, but I think they would have enlighted this major change. So, in my opinion, autodata is making a mistake.
Anyway, oil diluition is quite a common issue in GDI engines; in Europe it becomes an important problem, leading to early oil change, only in very cold weather and short trips: the gasoline dropped in the oil pan evaporates as  the oil temperature rise, so usually european gdi engines work fine.
The issues seem  small compared to Land Rover, certain models with  Ingenium diesel engines suffered such terrible engine oil dilution by diesel fuel , the engines were ruined  before the  first oil change from new after only 20,00 miles of use

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