1993 to 1999 Cam Wear Fix
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 6 of 6
Northstar Engines and System Technical Discussion Discussion, 1993 to 1999 Cam Wear Fix in Cadillac Engine Technical Discussion; ...
  1. #1
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
    Automobile(s): The Northstar Tuner
    Join Date
    Apr 2007
    Location
    Rock Hill SC
    Age
    46
    Posts
    2,754

    1993 to 1999 Cam Wear Fix

    I found a fix for the cam wear on 1993 to 1999 Northstars.

    Electronic Valve Control

    Overview
    An electronic valve control (EVC) system replaces the mechanical camshaft, controlling each valve with actuators for independent valve timing. The EVC system controls the opening and closing time and lift amount of each intake and exhaust valve with independent actuators on each valve. Changing from a mechanical camshaft driven valve into independently controlled actuator valves provides a huge amount of flexibility in engine control strategy.

    Vehicles utilizing EVC can realize several benefits including:
    • Increased engine power
    • Greater fuel economy
    • More environmentally friendly emissions

    With all of the improved efficiencies and consumer benefits, auto manufacturers are eager to get their first EVC systems on the road.

    The EVC system is targeted to operate in temperatures up to 125°C, while the actuator is targeted to run up to 6000 rpm. The actuator can be controlled in a centralized system with a high-speed multiplex bus (up to 10Mbps) or in a distributed system with a nominal speed bus.

    Key Benefits
    • Increases engine power and fuel economy
    • Allows centralized and distributed EVC systems to perform at their full potential
    • Adapts to engines of varied cylinder counts

    Design Challenges

    EVC systems must be compact in size, specifically the actuators that must be small enough to fit in the engine space. A vehicle that uses a 42 V system is ideal for EVC because it requires high voltage to control the valve actuators, and EVC is targeted for V8 and V12 engines. The EVC system is also highly flexible, allowing adaptability for a number of cylinder engines.

    Solution

    Freescale Semiconductor is developing solutions to meet customer requirements. Freescale's MPC565 microcontroller, which implements the PowerPC architecture, targets high-performance applications like EVC. With this powerful processor at the heart of an EVC system, both centralized and distributed systems can be developed to perform at their full potential.

    For a centralized system, a central processor will be designed to communicate with a local node that exists on each cylinder. A high-speed bus (up to 10 Mhz) will be used for communications. The local node is engineered with a communication layer for the master interface, valve control timings, and valve actuating parts. An important benefit of using Freescale's highly integrated solution is that silicon cost is minimized by using a centralized system approach.

    FlexRay, the communications bus for advanced vehicle applications, is engineered to address the needs of complex systems like EVC. It is ideal for the high-speed communication layer of the EVC system due to its high-speed capabilities (up to 10Mbps), fault tolerance, and tight synchronization.


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    ejguillot's Avatar
    ejguillot is offline Cadillac Owners Enthusiast
    Automobile(s): 2000 Seville STS
    Join Date
    Jul 2006
    Location
    Tampa FL
    Age
    39
    Posts
    986

    Re: 1993 to 1999 Cam Wear Fix

    LOL... bet that's still 10+ years out. And a 6000 RPM limit? Weak...

  4. #3
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
    Automobile(s): The Northstar Tuner
    Join Date
    Apr 2007
    Location
    Rock Hill SC
    Age
    46
    Posts
    2,754

    Re: 1993 to 1999 Cam Wear Fix

    Quote Originally Posted by ejguillot View Post
    LOL... bet that's still 10+ years out. And a 6000 RPM limit? Weak...
    it was 10 years out in 1986 when I heard about it on test engines.

    6000 would be enough by far.
    You could have continuous variable Lift, Duration, Cam Timing, and Cylinder Deactivation.

    I guess you could get some type of flat torque curve and the Horse Power could get a lot flatter also.

    Know add a CVT Transmission and you have the best of both.

  5. #4
    ejguillot's Avatar
    ejguillot is offline Cadillac Owners Enthusiast
    Automobile(s): 2000 Seville STS
    Join Date
    Jul 2006
    Location
    Tampa FL
    Age
    39
    Posts
    986

    Re: 1993 to 1999 Cam Wear Fix

    Well, 6000 RPM would be plenty for a diesel. And in the right application, it should work very well.

    So this has been 10+ years out since 1986? Why, too expensive?

  6. #5
    Submariner409's Avatar
    Submariner409 is online now If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    74
    Posts
    43,300

    Re: 1993 to 1999 Cam Wear Fix

    If the actuators are targeted to run a 6,000 rpm valve event, that's 12,000 engine rpm in a 4-cycle (the valves run at half speed.......)

    I suspect the size and complexity of the individual valve solenoids is a drawback.......a fuel injector operates on essentially the same principle, but we're talking incredible differences in moving mass and heat dissipation between an exhaust valve and fuel injector needle...

  7. #6
    eldorado1 is offline Cadillac Owners Connoisseur
    Join Date
    Feb 2004
    Location
    FL
    Posts
    2,250

    Re: 1993 to 1999 Cam Wear Fix

    Don't F1 cars use pneumatic valve control?

    Either way, it's pretty stupid. Replace a lobed hunk of steel with $5000 worth of electronics and batteries. I'm sure it will get worse gas mileage thanks to the 1000A alternator that powers it all.

    Nope, ZDP is the one for me.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting