High compression ratio, hydrogen enhanced gasoline engine system

Internal combustion engine system comprising:

• an internal combustion gasoline engine having a compression ratio in the range of 11-16;
• and
• means for introducing into the engine EGR along with a stoichiometric fuel/air mixture including hydrogen sufficient to prevent misfire and wherein the amount of EGR is always sufficient to prevent knock.

Internal combustion engine system comprising:

• an internal combustion gasoline engine wherein the compression ratio is in the 11-16 range;
• means for introducing into the engine fuel/air mixtures with an equivalence ratio of 0.4-0.7 along with an amount of hydrogen to substantially eliminate misfire, wherein the hydrogen is injected into the engine so as to be preferentially close to the spark plug.

Internal combustion gasoline engine system comprising:

• an internal combustion gasoline engine having a compression ratio in the range of 11-16;
• and
• means for introducing into the engine a varying fuel/air mixture along with a varying amount or fixed amount of EGR including hydrogen sufficient to prevent misfire and wherein the combination of the fuel/air mixture and EGR is always sufficient to prevent knock.

Internal combustion engine system comprising:

• an internal combustion gasoline engine having a compression ratio in the range of 11-16;
• and
• means for introducing into the engine fuel/air mixtures including an amount of hydrogen to substantially eliminate misfire at a first equivalence ratio in the range of 0.4-0.7 when the engine is operating below a selected torque or power level and introducing into the engine fuel/air mixtures in a second equivalence ratio wherein the second equivalence ratio is greater than the first equivalence ratio when the engine is operated above the selected torque or power level, the second equivalence ratio being sufficiently low at all times to prevent knock, and wherein the system further includes a knock sensor for detecting knock in the engine.