Case Study - V8 Engine Idle Control with L12 Actuator

Simple Aftermarket Idle Control Setup

Idle control is a critical aspect of engine management, especially in classic cars. Traditionally, carbureted engines utilize vacuum to regulate the idle. Depending on your needs however, this method can lack the precision and adjustability offered by modern solutions. In this case study, we explore how one of our clients used an L12 linear actuator to control the idle on a classic V8 engine, seamlessly integrating modern technology into a vintage system. This project showcases how others can achieve similar results using our micro linear actuators for smoother, more responsive idle control.


The Client’s Challenge

There are a number of reasons why a classic car owner might want to run an engine at a high idle. However, there is no mechanism for electronic idle control on older, mechanical V8 engines. To gain manual control over the idle speed, the owner chose to add a micro linear actuator to the system.

Why the L12 Linear Actuator?

The client chose the L12 linear actuator for several key reasons:

  • Compact Size: The L12’s small form factor made it an ideal fit for the classic car’s engine bay, where space is often limited.
  • Precision Control: With customizable stroke lengths and force options, the L12 provided the exact level of control needed for idle adjustments, ensuring smooth engine idle.
  • Smooth Operation: Unlike mechanical linkages, which can wear out over time, the L12 actuator offers a more reliable, low-maintenance alternative that delivers consistent performance.

Compared to traditional mechanical systems, the actuator offered a far greater degree of precision and reliability, making it the perfect choice for this project.

Installation Process

The installation of the L12 actuator was straightforward yet required careful planning to integrate it into the existing idle system. Here's how the client achieved it:

Mounting the Actuator

The L12 actuator was mounted in the engine bay near the idle linkage. The client used a custom mounting bracket to secure it in the desired location. The compact size of the L12 allowed it to fit neatly without requiring major modifications to the car’s original components.

Connecting to the Idle Control

The actuator was configured to push directly on the throttle lever. This simple setup eliminates the need to mechanically secure the actuator rod to the lever. The lever is sprung against the actuator rod end tip and will return to its resting position when the actuator is fully retracted. The owner secured the actuator midway using an included shaft bracket.

Wiring and Control Setup

While specific details on how the owner controls the actuator are unavailable, it appears that they are using a switch to drive the actuator outwards, allowing for a high idle. This setup enables the owner to warm their engine without holding a foot on the accelerator.

Control Options for the L12 Actuator


Manual Control

There are many control options available for our L12 actuator line and manual control is the most popular. These include switches, buttons, potentiometers and remotes. All of these items are available in our store.

Automated Control

Using a Arduino or other microcontroller, it is possible to automate the movement of the actuator based on inputs that you select. WiFi control is also possible using our IOT Servo Shield and Particle Photon WiFi module Bundle

Integrating Actuators Into Your Project

If you're looking to replicate this setup in your own classic car, there are a few key things to consider:

Actuator Selection

The size and stroke length of the actuator must be appropriate for your vehicle. The L12 is ideal for tight spaces but offers enough power to control most idle linkages. The actuator used in this example is an S-series L12 actuator with a 10mm stroke.

Mounting Location

Carefully choose a location in the engine bay where the actuator can be securely mounted and connected to the idle linkage. Mounting may require the use of a custom fabricated bracket, which can be made by anyone with basic fabrication skills.

Control Options

Decide whether you want manual control, automated control via a microcontroller, or a combination of both. Each option has its benefits depending on your driving needs. Actuonix has a variety of controllers and switches available to assist with this. Please ensure that the control option you choose is compatible with your actuator.

Conclusion

This project highlights how simple it is to upgrade classic cars with automotive actuators, improving performance without sacrificing the vehicle’s original aesthetic. By integrating an L12 actuator, the client successfully improved the performance of their classic car’s idle system, achieving a more precise level of control over their vehicle’s idle. Whether you're restoring a vintage vehicle or simply looking to upgrade, Actuonix actuators offer a modern solution for a wide range of automotive applications.

Explore Linear Actuators from Actuonix Today

This article demonstrates how to effectively use the L12 actuator for V8 idle control. To find out more about our products and explore our full range, visit our actuators by model page. As a leading manufacturer and innovator in the micro motion marketplace, Actuonix services companies big and small in various applications.