Engine Tab

There are 2 types of engine: Basic and Advanced. A Basic Engine uses simple drivers to drive the vehicle, and an Advanced Engine uses an engine simulator (torque curve, RPM and gears) to drive the vehicle.

Basic Engine:

The basic engine parameters allow for simple control over the vehicle's performance. Speed sets the speed the vehicle drives toward, and Torque sets how much power the wheels get to reach it.

• Speed: This parameter sets the target speed of the vehicle.
• Torque: This parameter sets the rotational force applied to the wheels. A higher value gives more power and faster acceleration.

Advanced Engine:

If no Engine Presets exist yet, press Create Engine to add one.

• Engine Presets: This is a list of default and custom presets. The default presets are Economy, Sports, Off-Road and Drift.

  • Preset List: Drop down Menu of Engine Presets.
  • Preset Name: Name of Engine Preset.
  • Add Preset: Adds a new Engine Preset
  • Duplicate Preset: Duplicates current Engine Preset
  • Delete/Reset Preset: Deletes the current custom Preset. For a default Preset this button resets it to its default settings instead.

• Engine Specs Tab:

  

  • Enable/disable Torque Curve: When enabled the torque uses the float graph and when disabled it uses the torque parameter table.
  • Torque Curve: The curve graph shows the engine's torque output across different RPM ranges.
  • Max RPM: Maximum engine RPM.
  • Max Torque: Maximum Torque available in the curve graph. It's important to note this isn't necessarily your peak torque.
  • RPM and Torque Values: The table sets your torque values at different RPM. The RPM column (in red) only labels each row, so don't change it.
  • Top Gear: This parameter sets the highest gear available in the vehicle's transmission. It determines the total number of gears the vehicle has⁠.
  • Drive Ratio: This parameter affects the overall gearing of the vehicle. It's typically the final drive ratio, which is the gear ratio between the transmission and the wheels. A higher drive ratio provides more torque at the wheels but reduces top speed, while a lower ratio does the opposite⁠.
  • Gear Ratios: The table shows each gear ratio and determines how engine speed is converted to wheel speed in that particular gear. Lower gears (with higher numbers) provide more torque for acceleration, while higher gears (with lower numbers) allow for higher top speeds. The gear numbers (in red) only label each row, so don't change them.

• Engine Behaviour Tab: There are two modes, Automatic and Manual, which set the transmission type. Automatic shifts gears by itself. In Manual you shift gears yourself: with Gear in the Controls tab, Q/E on the keyboard, or the bumpers on a controller.

  

  • RPM Shift Gear Up: Automatic only. The engine speed at which the vehicle shifts to a higher gear (default 5000). If Max RPM is at or below this value, the engine can't shift up and a warning is shown.
  • RPM Shift Gear Down: Automatic only. The engine speed at which the vehicle shifts to a lower gear (default 1000).
  • RPM Idle: The engine speed when the vehicle is stationary with the engine running (default 800).
  • RPM Speed: This represents a multiplier for engine speed calculations.
  • RPM Up Increments: This controls how quickly the engine RPM increases when accelerating.
  • RPM Down Increments: This controls how quickly the engine RPM decreases when decelerating.
  • RPM Noise: This adds random variations to the engine RPM for more realistic behavior.
  • Reset Engine on first frame: If option is checked, the engine state will be reset at the start of each simulation.
  • Auto Throttle: Automatic only. When checked, the engine throttle automatically tries to reach the set Target Speed (Speed in the Controls tab). When unchecked, the engine is controlled by the Throttle value.

  Note: If the Engine panel shows "No Engine Node Group Found", click the Reset button next to the Engine Preset to re-import the engine node group.