Throttle Response Optimization – Part 3 of 3

Part 3: Mechanical and Electronic Solutions for Optimal Throttle Response

The chart's title is "Potentiometer Position vs. Throttle Plate Poston The shows the relationship between potentiometer position (x-axis) and throttle plate position (y-axis). This chart shows the relationship that must exist between the potentiometer and the throttle plate in order to follow the green line on the above chart. You can see that the throttle plate opens quickly in response to response to very small potentiometer changes. — Figure 3

To solve the enrichment problem, engineers can turn to either mechanical linkages or electronic modifications. This post explores both approaches and their advantages.

Figure 3 shows how varying linkage ratios can create the desired convex response. By using levers, bellcranks, or idler shafts, engineers can:

Accelerate TPS movement by linking a longer input arm to a shorter output arm generates a faster TPS response at low throttle positions.
Align full throttle positions so that the TPS and throttle plate each reachs 100% open simultaneously, ensuring proper calibration.

Instead of mechanical adjustments, electronic modifications can reshape the TPS output signal before it reaches the engine control module (ECM). Advantages include:

Flexibility: Easily adjustable response curves to match specific engine requirements.
Adaptability: Ideal for modern engines with more sophisticated algorithms.

Whether using mechanical or electronic solutions, these adjustments offer better throttle response and efficiency. The choice depends on the engine design and available resources.

This concludes the series on throttle response optimization. Share your thoughts or explore these solutions in your engine projects!