Parallel Hybrid-Electric Vehicles

The NVH app directly supports the following Parallel Hybrid Configurations

According to the SAE J1715, four parallel configurations are designated as P1, P2, P3, and P4. SAE Technical Paper 2017-01-1175 defines a fifth parallel configuration named “P0”.

  • P0 Parallel = A hybrid system that utilizes an electric motor-generator coupled to the engine through a drive belt that can provide the function of the alternator and starter as well as hybrid functions of assist and regeneration.  These systems are known as Belt-Alternator-Starter (BAS) or Integrated Starter-Generator (ISG) systems.
  • P1 Parallel = A hybrid system that is connected directly to the crankshaft of the engine with some type of clutch/fluid coupling between the electric motor and the gearing. Example vehicles: Audi, BMW, Honda, Hyundai, Kia, Mercedes-Benz, Porsche, Volvo, VW. These systems are known as integrated motor-generator (IMG), integrated motor assist (IMA), flywheel assist system (FAS).
  • P2 Parallel = A hybrid system with one clutch/fluid coupling between the internal combustion engine (ICE) and the electric motor and a second clutch/fluid coupling between the electric motor and the gearing. Example vehicles: Ford Explorer and F-150 Hybrid, Jeep Wrangler Unlimited PHEV, Toyota Tundra Hybrid.
  • P3 Parallel = A hybrid system that is connected directly to the driveshaft between the transmission and the differential/axle. Example vehicles: 2014-2016 Subaru Crosstrek Hybrid, Class 4-8 Trucks, BorgWarner Modular Drive. 
  • P4 Parallel = A hybrid system that is connected directly to the differential/axle. Example vehicles: The rear axle of a Toyota RAV4 AWD Hybrid, a Class 4-8 Truck rear axle.
    P0, P1, P2, P3, P4 Parallel Hybrid Configurations

    What the app can do

    The NVH app is designed to automatically detect the type of vibration your vehicle is experiencing, provided the instructions of the road test procedure are followed.

    There are 14 types of vibrations the NVH app can automatically detect:

    • Tire speed-related (1st, 2nd, and 3rd order vibrations)
    • Driveshaft speed-related (1st, 2nd, and 3rd order vibrations)
    • Engine speed-related (0.5, 1st, 2nd, 3rd, 4th, 5th, and 6th order vibrations)
    • Electric Motor Speed Related (1st order vibrations)

    Each type of vibration has unique causes. A vibration type is not the same thing as a vibration source. There are many possible causes (sources) for each vibration type. The NVH app includes step-by-step instructions on locating the vibration source once the app has identified the type of vibration.

    What the app cannot do

    •  The NVH App cannot automatically tell you the source of a vibration
    • Although the NVH app is excellent at identifying the type of vibration your vehicle is experiencing, you or someone else will need to follow the diagnostic steps described in the app help files to identify the exact cause or source of the vibration.

    There are almost 300 possible sources of vibration concerns in today’s vehicles

    T1 Diagnostic Help

    THE NVH APP IS HERE!

    Turn your Phone or Tablet into a Vibration diagnostic tool! Purchase our new App to use the internal sensors of your Phone or Tablet to diagnose the type of vibration your car or truck is experiencing. There are close to 300 individual vibration sources on a typical vehicle; the NVH App knows each one of them and can guide you through the entire diagnostic and repair procedures for each one of them.

    What issues have you had with diagnosing vibration, harshness and noise issues?

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