Results 21 to 28 of 28
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August 28th, 2012 06:03 PM #21
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August 28th, 2012 06:05 PM #22
The extra valvetrain parts equate to higher frictional losses, but the effect is not that big. Differences in fuel economy between vehicles is usually more down to the specific tuning of the engine, valve-timing, camshaft profiles and engine tuning. DOHC engines will sometimes not be as fuel-efficient as SOHC engines by the same manufacturer, but mostly because the DOHC engines are specifically designed for more performance (case in point: Honda K20 versus R20), sacrificing fuel economy in the process.
And yet the Mazda SkyActiv, which seems to be more efficient still than the R20, is DOHC.
Ang pagbalik ng comeback...
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August 29th, 2012 09:10 PM #23
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August 29th, 2012 11:36 PM #24Is this officially out? I just saw a Black Outlander in EDSA and it looks new (with conduction sticker pa pero may plate number na). The plate number also starts with "T". Wasn't able to get a picture kasi mag isa lang ako sa kotse kanina.
So I'm not sure if its the new one or a new older version of the outlander (maybe they still have some stock of the old one??)
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August 29th, 2012 11:44 PM #25
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August 30th, 2012 01:16 AM #26
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August 30th, 2012 10:42 PM #27Old MIVEC being used in 4B11 has to be DOHC in order to have a variable valve offset. Each camshaft has a hydraulic operated special hub capable of advancing and delaying the valve opening and closing.
The New MIVEC adopted by 4J11 makes the DOHC obsolete (within the Mitsubishi technology). The new MIVEC still uses a special hub at the end of the cam but one piece only thus increasing the reliability.
The new MIVEC is now Variable Valve Lift coupled with the old Variable Valve Opening Timing.
The new MIVEC should be named as:
VV-Li VVOT.. heheh
The link below has photo of the new MIVEC valvetrain. You can still see the special hub (with sprocket) from the previous technology. You will easily notice the E-motor driven shaft that creates a variable valve lift.
»°É©¡Ö¿·MIVEC¡×¤¬Í½´¶¤µ¤»¤ë¡¢DOHCÁ´À¹´ü¤Î½ª¤ï¤ê¤Î» Ϥޤê - ¥¯¥ë¥Þ - Tech-On¡ª
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August 30th, 2012 11:30 PM #28
Others have already applied variable valve opening with SOHC. Variable timing is possible, too. The difficulty is making it independent for both intake and exhaust when using a single shaft.
sinabi moh! i hardly see my children now. when they were young, schedules were more predictable.
Traffic!