Homogeneous Thermal Charge Spark Ignition combustion is mechanically controlled, increased to just BEFORE the point of self ignition by hot air and ignited by a spark or compression

Homogeneous Charge Compression Ignition combustion is computer controlled and increased to the point of self ignition by hot air and compression

Mechanically simple combustion process that costs much less to service and repair than new vehicles.

Mechanically a very complex and expensive combustion process that requires mortgaging your house to service and repair it.

Produces consistent clean burn combustion and is easy to control mechanically.

Produces erratic combustion and is very difficult to control even with computers.

Works at ALL engine speeds and throttle positions which is USEFUL technology that can be used by every vehicle from cars, trucks, motorcycles, boats to planes.

Works at ONLY one engine speed and one part throttle position which is USELESS technology for vehicles.

Unfortunately this doesn�t prevent some confused carmakers and universities wasting millions trying to improve the outdated HCCI combustion while more advanced combustion technology is available.

Works at full throttle.

Does NOT work at full throttle.

Works with ALL old and new vehicles from carburetion, gas to fuel injection that use spark ignition.

Uses a unique combination of mechanically simple parts and systems to produce and control HTCSI combustion that bolt on easily like conventional performance parts to ALL old and new vehicles.

Works with ONLY computerised new vehicles modified with direct injection, compression ignition and many additional complex and expensive systems.

Also works with ALL old and new diesel vehicles that use compression ignition.

Does NOT work with diesel vehicles.

Increases power at ALL engine speeds and throttle positions.

Reduces power but at least it works at ONLY one engine speed and one part throttle position.

Increases fuel economy by 30-50% at ALL engine speeds and throttle positions.

Increases fuel economy by 15% at ONLY one engine speed and one part throttle position. At all other engine speeds and throttle positions the engine converts back to conventional spark ignition combustion which reduces fuel economy.

Substantially reduces toxic emissions at ALL engine speeds and throttle positions.

Reduces toxic emissions at ONLY one engine speed and one part throttle position. At all other engine speeds and throttle positions the engine converts back to conventional spark ignition combustion which increases toxic emissions.

Uses conventional points, electronic or computerised ignition system with special ignition timing to ignite the hot homogenous intake charge.

Can also use compression ignition used by diesels to ignite the hot homogenous intake charge.

HTCSI combustion does NOT use or need the complex and expensive systems required by HCCI combustion in order to work.

Just what everybody wants...even more complex and expensive vehicles fitted with more useless systems.

Does NOT need computers but they may be used to enhance HTCSI combustion.

Does NOT work without computers therefore, they MUST be used to control HCCI combustion.

Uses High Pressure Differential Turbulence (HPDT) generated by the Negative Pressure Supercharging process to produce a homogenous intake charge with NO restriction to air flow.

Uses direct injection, high swirl intake ports that restrict air flow, close chamber heads and higher compression to produce a homogenous intake charge.

HPDT produces a MORE uniform homogenous intake charge with carburetion, gas, fuel injection or diesel than direct injection, high swirl intake ports, close chamber heads and higher compression.

Produces a LESS uniform homogenous intake charge than HPDT.

Uses hot air induction to increase the temperature of the homogenous intake charge to just BEFORE the point of self ignition.

Does NOT use or need exhaust gas recirculation.

Uses hot air induction or exhaust gas recirculation to increase the temperature of the homogenous intake charge to the point of self ignition.

Uses a COLD cooling system to prevent the homogenous hot intake charge from exceeding the optimum hotter combustion temperature and igniting BEFORE spark or compression ignition.

Uses a HOT cooling system to help the homogenous intake charge self ignite which also helps reduce power.

Uses fixed Synchronised Valve Timing (SVT).

Uses variable valve timing.

Uses fixed 8.5 compression.

Uses variable compression.

Uses OPEN chamber heads.

Uses CLOSE chamber heads.

Uses HIGH flow NON-swirl intake ports.

Uses LOW flow high swirl intake ports.

Uses 13 � 15:1 RICH burn combustion which produces a much faster CLEANER burn.

Uses 18 � 20:1 LEAN burn combustion which produces a much slower DIRTY burn.

Uses ONLY one fuel system.

Uses multiple fuel systems.

Works with low or high octane fuel.

Works with ONLY high octane fuel.

For more details see Ultra Fast Burn

For more details see HCCI