• Clean Energy
• Marine
• Automotive Expertise
  • Hybrid and Electric Vehicles
    • Consultancy and Studies
    • Demonstrators and Production programmes
    • Technical Expertise
      • Architecture Definition and Simulation
      • Systems Integration
      • Hybrid and EV Control Systems
      • NVH - Noise and Vibration Expertise
      • Hybrid Transmission Design for OEM
      • Power Electronics & Electric motors
    • Contact
  • Controls and Electronics
  • Diesel Engines
  • Spark Ignition Engines
  • Prototechnik (Deutsch)
  • Driveline and Transmission
  • Vehicle Systems
  • Research and Technology
• Fuels and Lubricants
• Defence Systems and Technologies
• Motorsport
• Engineering Services, Testing, Manufacturing
• Large and Other Engines

Driveline Dynamics

• Clunk – caused by fast torque reversal through gear lash unwinding and winding the torsion shaft
• Torque blending (steady-state or transient) mismatch between engine and electric motor
• Transient torque blending mismatch between electric motor and friction brakes during ABS event
• Sudden drop-off of electric torque due to faulty motor, power electronics or battery

NVH Issues

• Sound quality issues - Unexpected acoustic signature due to hybrid-specific operating modes such as electric-only operation and audible noise from motor / gears Idle rattle
• Driveline vibrations due to low-speed electric motor torque ripple

Ricardo capabilities

• Transmission, driveline, engine, powertrain and whole vehicle
  NVH expertise
• Experienced Transmission & Driveline NVH problem solving (Gear whine, Gear Rattle, Gearshift Quality), closely linked to Ricardo Transmission design to give proven, “real world” solutions