Announcement

Collapse
No announcement yet.

GM Direct Injection Video

Collapse
X
Collapse

  • GM Direct Injection Video

    Originally from GM Powertrain...
    PONTIAC, Mich. – Anyone who has ever played the game “telephone” knows that the more times a message gets passed along, the less accurate it will be when it gets to its destination. The same thing applies to feeding fuel to an engine.

    Across-the-board use of direct injection in the Buick lineup is helping to take translation layers out of the delivery process to reduce both fuel consumption and emissions. Buick is the only domestic brand powered exclusively by direct injected engines.


    Direct injection has enabled fuel economy improvements of up to 3 percent on the Buick Enclave, LaCrosse, Regal and the upcoming Verano – without sacrificing performance and still meeting the world’s most-stringent emissions requirements.

    Over the past three decades, fuel delivery systems have evolved from the relatively primitive carburetor that relied on the Bernoullieffect to draw fuel through a tiny jet as air accelerated by, to the more-precise throttle body injection that gave way to port and finally direct injection.

    Today’s high-pressure direct injectors deliver fuel to the point of combustion in the cylinder so fuel doesn’t get left behind on manifold walls or evaporate up out of a carburetor.

    The demise of the carburetor ended problems like flooding and vapor lock and direct injection brings several benefits over the more recent sequential port fuel injection systems.

    “The 2,200 pounds per square inch of pressure that feeds the injectors provides a more atomized and precisely metered fuel spray to each cylinder before every combustion event,” said Ecotec chief engineer Mike Anderson.

    When used on boosted engines like the 2.0-liter Ecotec Turbo in the Regal and the upcoming Regal GS, direct injection also provides a charge cooling effect.

    “Spraying fuel directly into the combustion chamber reduces the temperature of the compressed mixture as the fuel evaporates, which enables a higher-compression ratio, allows for more spark advance, and reduces fuel consumption” said Anderson. “The beefier low-end torque and improved drivability of the direct-injected 2.0L turbo makes it a no compromise high-efficiency substitute for a bigger and heavier V6.”

    Engines with direct injection also warm up faster thanks to the ability to add a second injection pulse right before the spark plug ignites the fuel following a cold start. This faster warm up can cut emissions of unburned hydrocarbons by up to 25 percent.

    With direct injection, the 220 horsepower Regal Turbo beat the Acura TSX by 19 hp and 88 pound-feet of torque from just 2,000 rpm while still achieving up to 32 mpg on the highway, an advantage of 4 mpg. The Enclave is the most fuel efficient eight-passenger crossover on the market with an EPA estimated 17 mpg city and 24 mpg highway.
      Posting comments is disabled.

    Article Tags

    Collapse

    There are no tags yet.

    Latest Articles

    Collapse

    • New Site, New Test
      SappySE107
      Why create an article? Because we need to be able to find important information long after your Facebook post is lost in a BBS style thread setup....
      10-04-2016, 10:54 AM
    • Saginaw power steering pump - Resealing....
      davida1_hiwaay_net
      Hi folks! Sorry I've been offline for quite some time. Been working overseas and it's been crazy! Anyway I finally got around to fixing the leaking steering pump on my 84 Century. As far as I know the PUMP is original to the 1987 year engine (which i bought as a core engine). For quite some time, it has leaked oil slowly, so that if the car sits for a month or so, all the oil is gone out of the steering pump. So, today I fixed it. I was quoted a high sum of money for a "rebuilt" pump of dubious quality. Forget the chinese knock-off ones. The seal kit was about $15. This is a picture-intense thread, because that's the best way to explain the steps. There is nothing hard about this, but you do need a couple special tools (pulley remove / install tool, and drill press). The puller is available for rental from Advance Autp Parts. There are several variants of this pump. The main difference is the shape of the reservoir. The repair procedure is the same for them all, aside from the reservoir removal could vary a little. The pump...
      03-18-2013, 07:25 PM
    • LQ1 Service Bulletin 57-61-09 Lifter tick (cold)
      Schurkey
      Dug up the GM Service Bulletin for "Lifter tick when cold", 57-61-09. '91 to '95 LQ1 (VIN X)

      http://mymonte.com/discussion/topic/...e-%2357-61-09/ The parts kit has been discontinued by GM long ago. My quest was to find sources for those parts; and complete the procedure on my '93 Lumina Euro 3.4 which was torn apart to replace the rear head gasket. There are three critical part numbers in the GM service kit (aside from gaskets and O-rings) required to perform this operation. Two of the three are readily available in the aftermarket--the 10-32 set screws, and the cup plugs. I hadda buy a box of cup plugs and a batch of set screws; if you can't find 'em locally, send me a PM. All gaskets 'n' seals are readily available, and are included in the gasket set I needed to replace the head gaskets (Fel-Pro HS9113PT1 Head Set.) This leaves one item that is expensive to source--the replacement thrust plates. Reading the bulletin, and...
      03-02-2012, 02:48 PM
    • VB Table Test
      bszopi
      <table id="Table_01" width="1281" height="993" style="border:0px; cellpadding:0px; cellspacing:0px;"> <tr style="border:0px; cellpadding:0px; cellspacing:0px;">
      02-22-2012, 12:16 PM
    • How to read turbo maps...
      Driver_10
      There have been a couple of guys who wanted to know how to read a compressor map. Hopefully, I haven't made any mistakes this time (unlike the last) and this will prove to be useful to you in your understanding of a compressor map. Reading a turbo map isn't as difficult as it looks. The map displays 4 key pieces of information. A. It displays the pumping efficiency of the compressor (meaning the amount of actual air that it pumps in contrast to the amount of heat that's created while wasting energy) B. The physical amount of air that it can move in pounds per min (just like it says, how much air per/ min) C. The pressure ratio of the air being pumped (that is, the ratio of pressure that it is capable of that pumping in contrast to the ...
      11-27-2011, 10:01 PM
    • 2012 V6 Product Guide
      bszopi
      GM has recently released their 2012 Product Guide, which details all of the engines and transmissions used in production vehicles, as well as the specs of the engines. Several years ago, we used to outline these updates, but have been lacking in getting the information out for the past few years. In an effort to try to keep the site up on the most recent releases from GM, I am trying to get this information back into articles again. With that said, on to the information.
      ...
      09-20-2011, 01:19 PM
    Working...
    X