Hydrogen IC Engine Conversion Project

Project Aim/Brief

• Design, build and implement a simple engine management system to allow an otherwise unmodified engine to run on hydrogen gas

– What does this mean?

– Solution to be as simple as possible

– Initial ideas too simple

Hydrogen and the ICE

• Benefits– Wide Flammability range, High diffusivity, High auto-ignition

temperature, Low ignition energy, High flame speed

• Problems– High flame speed, Pre-ignition, low density, small quenching distance

Engine Management• Closed Loop Control

– Sensors, processor, actuators

• Maps– Fuel and ignition

Sensors

• Opto-Slot– High speed, digital

• Heated O2

• MAP

• Accelerator– Analogue potentiometer or switch

operated

Actuators

• Injector– CNG injector, 3mm orifice

• Approx mean flow rate 3.25L/s at 1 BAR

• Ignition– Opto-isolated MOSFET – coil

Project Targets

• Sensors, actuator subsystems to be designed by week 12– Target Met

• Test/calibrate Sensors by week 12– Target not met due to delay in acquiring specialised parts

• On-the-fly reprogrammability– New target, close to completion

• Processor Hardware/Software– On Target

• System Testing/Evaluation– On Target assuming sensors/injector materialise soon

Week 13-20

• Attempt to complete system by end of week 14

• Verify stability and behaviour. Organise safety inspection by end of week 15

• Implement system on test engine, fine tune, gather results by end of week 20

• Easter - Write report, prepare oral presentation

Any Questions?