Level 1 - Safety and Fundamentals
High Voltage Safety and Hybrid Vehicle Systems (CESD-110)
- Describe safety precautions and personal protective equipment (PPE) used when working on or around high voltage vehicles. Inspecting, and testing of PPE
- Explain safe depowering procedures for hybrid and electric bus, function of main hybrid electric vehicle components
- Identify different hybrid electric vehicle types, platforms, component configurations, and main auxiliary systems found on hybrid and electric bus
- Describe strategies such as Geo fencing and emergency backup power supply using Hybrid and Electric Bus
Introduction to Hybrid and Electric Bus Overview (CEHB-109)
- Define and compare hybrid, electric, plug-in and traditional combustion engine bus technology
- Define commonly used components within a Hybrid or Electric bus electronic system
- Explain the importance of Lock out Tag out (LOTO) and the sequence of performing a LOTO
- Demonstrate a LOTO procedure in the lab
- Explain the purpose and operating principles of: IGBT, Contactors, Relays, Precharge circuit and Precharge resistors, and Keying Resistors (when used)
- Discuss driver interactions and concerns such as vehicle interfaces, charging and range
- Explore the operation of main hybrid and electric vehicle components including low and high voltage systems
- Investigate passenger safety systems and emergency response guides
- Define battery and transmission technologies used in hybrid and electric bus
Level 2 - Systems, Components and Troubleshooting
Introduction to High Voltage Battery Systems (CEHB-111)
- Define various Battery types used in Hybrid and Electric bus, Cell pack vs Module pack energy storage system (ESS)
- Explain the importance and process of Battery management systems; Balancing, temperature regulation, High voltage interlocks (HVIL) and Manual safety disconnect (MSD)
- Define High voltage battery ratings and specification as they relate to transit such as; State of charge, KW/h and Amp/h, energy density and power factor
- Discuss the different types of chargers, charging configuration and level of charging found on Hybrid and Electric bus and factors that determine which charging system is used
- Demonstrate maintenance and diagnostics on High Voltage battery
- Deenergizing, MSD, HVIL, Isolation faults
- Outline the causes and effects of a thermal event, such as; Emergency response guidelines and procedures to thermal event, and environmental impact
Introduction to Drive Systems, Brake and Regenerative Braking (CEHB-112)
- Define Hybrid and Electric Bus drive systems
- Outline the operation principle of a Drive motor
- Demonstrate testing loss of Isolation on the Drive system
- Outline the similarities between Induction and Permanent Magnet Drive Motor
- Explain Braking strategies adopted for Hybrid and Electric Bus
- Explain the operating principles of Regenerative braking
- Discuss maintenance and cost related
Hybrid and Electric Bus Maintenance and Accessory Systems (CEHB-113)
- List the High Voltage and Low Voltage accessories found on Hybrid and Electric Bus
- Explain the operating principle of Hybrid and Electric bus accessory circuits
- Air Compressor, Power steering pump, Heating and Cooling, and Door controls
- Discuss the benefits Electro mobility plays with Telematics
- Outline the maintenance requirements for each major component on Hybrid and Electric Bus
- Demonstrate standard operating practices for maintaining hybrid and electric bus
Advance Troubleshooting and Systems Overview
- Explain the fundamentals of using wiring schematics used in the Transit sector
- Define CAN communication and the various DATA bus protocol found on Hybrid and Electric bus
- Outline CAN bus troubleshooting and manipulation
- Outline various Electronic Service tools used on Hybrid and Electric Bus