'Blackburn Cycle' or Ideal Explosion Engine is more fuel efficient than Hybrid

One 'Blackburn Cycle' includes two 4 stroke cycles. These adjacent 4 stroke cycles are usual 4 stroke cycles for high power, but they are different for low power.

To make a good bomb the ingredients need to be well mixed in the ideal proportions. Explosions in an engine cylinder are similar. An ideal fuel/air mixture of 1:14, free from any exhaust gas, gives more power from less fuel.

For low power the 'Blackburn Cycle' has alternate 'air only' 4 stroke cycles in each cylinder, between usual fuel/air 4 stroke cycles. This 'air only' flushes all exhaust gas through the engine so that the next combustion contains an ideal explosive charge of fresh fuel/air with no exhaust gas.

Exhaust gas has burnt once it will not burn again but, if present with fuel and air, will reduce the temperature and pressure increase during combustion. 4 stroke engines use variable valve timing and tuning to reduce some of the old exhaust gas mixed with each new fuel/air charge. The 'Blackburn Cycle' eliminates old exhaust gas completely up to half load.

BC is MORE fuel efficient than Hybrid. There is no difference between Ordinary 4 stroke, Hybrid and the 'Blackburn Cycle' for higher power with a thermal efficiency about 35%. Hybrids charge their batteries at this high efficiency, but there is a loss converting mechanical power to electric and a further loss converting electrical energy back to mechanical to power the vehicle. Hybrid efficiency reduces as power reduces.

The 'Blackburn Cycle' is more fuel efficient below half power, than at full power, because combustion conditions are then more ideal, with 1:14 fuel/air mixture and no exhaust gas. While Hybrid efficiency reduces as power reduces the 'Blackburn Cycle' efficiency actually increases, and this gain continues right down to idling speed. The 'Blackburn Cycle' is also cheaper and lighter than Hybrid which itself saves fuel.

Compared with current 4 stroke engines the 'Blackburn Cycle' saves about 30% fuel and CO2 emissions overall for the same performance. If drivers usually limit acceleration to half power the overall gain will increase to nearly 50%.

The nature of combustion and the laws of Physics mean that the 'Blackburn Cycle' should replace the 4 stroke Otto Cycle. The Car Makers, Academics, Governments and their Agencies have all been slow to test or benefit from this technology.