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Section Eleven: HVE Brake Designer

Updated Markdown edition of the HVE User's Manual (HVE Version 5, Seventh Edition, January 2006), Section Eleven "HVE Brake Designer" (Section Ten / Chapter 28 of the original manual is reserved for future use). Verified against the current HVE application source (HVEINV-64/HveBrakes.cpp, BrakeDesign*.cpp, BrakeAssemblyDlg.cpp, ABSDesignerDlg.cpp, ABSSystemDlg.cpp).

The HVE Brake Designer is a time-domain simulation model of user-defined brake system components. The purpose of the HVE Brake Designer is to provide a detailed brake design capability integrated directly within the HVE simulation environment. The capability includes the design and evaluation of wheel brake assemblies and ABS systems by engineers charged with fitting new vehicles with properly designed brake system components, as well as the evaluation of in-use service conditions. This section of the HVE User's Manual describes how to create and edit various brake system designs. It also provides an overview of the brake and ABS model parameters.

The HVE Brake Designer was developed by Engineering Dynamics Corporation, and was based, in part, on previous work by Limpert [4.31], MacAdam [4.2], Flick [4.32] and Robert Bosch [4.42].

Although the HVE Brake Designer is a very powerful tool based on widely accepted scientific principles, brake design engineers know that brake torque calculations are not exact, mainly because the precise friction value is never known; it is always estimated. Therefore, brake design engineers and safety researchers should use the HVE Brake Designer as they use other modeling tools. The results are useful for matching measured dynamometer data, extending existing designs, providing parametric comparisons and estimating the behavior of a proposed design.

General Procedure

To use the HVE Brake Designer, perform the following steps:

  1. Select Vehicle Mode.
  2. Select one or more vehicles from the Vehicle Database or from a previous HVE case.
  3. Click on the Brake System icon and confirm or edit the Brake Pedal Ratio.
  4. If the vehicle is fitted with ABS, click on the ABS Installed checkbox. Press Edit to view and edit the desired ABS system properties.
  5. Click on a wheel and choose Brakes from the pop-up menu.
  6. Click on the Brake Assembly Type option list and choose the desired brake design (e.g., Disc Brake, Duo-servo Drum Brake). The HVE Brake Designer dialog for the selected brake type is displayed.
  7. Edit the desired properties.
  8. Press OK to accept the current design.
  9. Edit the remaining wheels as desired.
  10. Execute the desired suite of simulations to test the effectiveness of the design.
  11. Edit the design as required to obtain optimum braking performance.

Overview of Section Eleven

This section provides a detailed explanation of the modeling techniques used by the HVE Brake Designer, and also presents an overview of the Brake Designer's interface.

The individual brake dialogs are documented in detail (verified against current source code) in docs/manuals/04-brakes-powertrain/:

Next: Chapter 29 — HVE Brake Designer →