Hybrid vehicle systems
Hybrid vehicle systems: Hybrid traction torque is coordinated between ICE, electric machine and transmission/clutch state. The page also includes a worked example and measurement sequence.
Technical frame
Hybrid vehicle systems: Hybrid traction torque is coordinated between ICE, electric machine and transmission/clutch state. The page also includes a worked example and measurement sequence.
The technical values here expose the standard, protocol or physical relationship directly; model-specific service values are linked through the matching model/variant dossier.
The goal is not only to define the term but to let the reader calculate and interpret what the data means in a scan, scope or physical test.
Concrete technical facts
- Hybrid traction torque is coordinated between ICE, electric machine and transmission/clutch state.
- At 48 V and 100 A, ideal electrical power is 4.8 kW; real power changes with voltage drop and efficiency.
- Regenerative braking recovers part of kinetic energy, while battery SOC/temperature/power limits constrain regen.
- In disconnect-clutch hybrids, clutch slip and engine speed matching determine ICE engagement quality.
- Brake-blending diagnosis compares driver demand, regenerative torque and hydraulic brake pressure on the same timeline.
- Mild hybrid, full hybrid and PHEV architectures differ in electric-only propulsion capability and HV energy capacity.
Worked example
- Kinetic-energy example: a 1800 kg vehicle at 20 m/s has E=½mv²=360 kJ. At an assumed 60% recovery, 216 kJ could theoretically be recovered; real system limits can reduce it.
Measurement and verification sequence
- Log commanded/actual ICE and e-motor torque.
- Observe battery power/current limits with SOC and temperature.
- Record clutch state/slip and engine speed matching.
- Compare brake demand, regen torque and hydraulic pressure together.
Fault-separation logic
- Is a valid command present and are power/ground/network healthy?
- Does feedback follow the command?
- Does an independent physical measurement confirm the output?
- Is the fault limited to a specific temperature/load/speed condition?
- Does the result remain stable when the original condition is repeated after repair?
Technical sources
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