Single nozzle direct injection system for rapidly variable gasoline/anti-knock agent mixtures

Engine management system for operation of a direct injection spark ignition gasoline engine comprising:

• a gasoline engine;
• a source of gasoline;
• a source of anti-knock agent;
• a first low pressure pump for pumping gasoline from the source of gasoline;
• a second low pressure pump for pumping anti-knock agent from the source of anti-knock agent;
• a proportioning valve for receiving gasoline and anti-knock agent from the first and second low pressure pumps and delivering a selected mixture of gasoline/anti-knock agent to a high pressure pump;
• and
• at least one injector for receiving the selected mixture from the high pressure pump and directly delivering the liquid mixture into a cylinder of the engine where the ratio of the anti-knock agent to gasoline is sufficient to prevent knock as the torque is increased and where the volume between the high pressure pump and the fuel injectors is minimized to improve transient performance

Engine management system for operation of a direct injection spark ignition gasoline engine comprising:

• a gasoline engine;
• a source of gasoline;
• a source of anti-knock agent;
• a first low pressure pump for pumping gasoline from the source of gasoline;
• a second low pressure pump for pumping the anti-knock agent from the source of anti-knock agent;
• a high pressure pump for receiving the gasoline and anti-knock agent and pressurizing them separately;
• a proportioning valve for receiving the pressurized gasoline and anti-knock agent and delivering a selected mixture of gasoline and anti-knock agent to at least one injector for direct injection into a cylinder of the engine wherein the ratio of the anti-knock agent to gasoline is sufficient to prevent knock as the torque increases and where the volume between the high pressure pump and the fuel injectors is minimized to improve transient performance.

Engine management system for operation of a direct injection spark ignition gasoline engine comprising:

• a gasoline engine;
• a source of gasoline;
• a source of anti-knock agent;
• a first low pressure pump for pumping gasoline from the source of gasoline;
• a second low pressure pump for pumping the anti-knock agent from the source of anti-knock agent;
• one or multiple high pressure pumps for receiving the gasoline and anti-knock agent and pressurizing them separately;
• at least one injector with multiple PWM valves that receives separately the pressurized gasoline and antiknock agent, controlling the amount of anti-knock agent and/or gasoline to be directly injected into a cylinder, allowing for cycle-to-cycle control of the anti-knock agent/gasoline ratio, wherein the ratio of the anti-knock agent to gasoline is sufficient to prevent knock as the torque increases.

Engine management system for operation of a direct injection spark ignition gasoline engine comprising:

• a gasoline engine;
• a source of gasoline;
• a source of anti-knock agent;
• a first low pressure pump for pumping gasoline from the source of gasoline;
• a second low pressure pump for pumping the anti-knock agent from the source of anti-knock agent;
• one or multiple high pressure pumps for receiving the gasoline and anti-knock agent and pressurizing them separately;
• at least one pulsed pressure-air-assist injector with two secondary PWM valves that receives separately the anti-knock agent and the gasoline, controlling the amount of anti-knock agent and/or gasoline that is directly injected into a cylinder, allowing for cycle-to-cycle control of the anti-knock agent/gasoline ratio, wherein the ratio of the anti-knock agent to gasoline is sufficient to prevent knock as the torque increases.

Engine management system for operation of a direct injection spark ignition gasoline engine comprising:

• a gasoline engine;
• a source of gasoline;
• a source of anti-knock agent;
• a first low pressure pump for pumping gasoline from the source of gasoline;
• a second low pressure pump for pumping anti-knock agent from the source of anti-knock agent;
• a proportioning valve for receiving gasoline and anti-knock agent from the first and second low pressure pumps and delivering a selected mixture of gasoline/anti-knock agent to a high pressure pump;
• and
• at least one injector for receiving the selected mixture from the high pressure pump and directly delivering the liquid mixture into a cylinder of the engine where the ratio of the anti-knock agent to gasoline is sufficient to prevent knock as the torque is increased and where the volume between the high pressure pump and the fuel injectors is minimized to improve transient performance and where during initial stages of a transient that requires increased anti-knock agent the fuel contained in the volume between the injectors and the proportional valve is flushed away in order to speed the process of composition adjustment of the directly injected fuel.

A fuel management system for a direct injection gasoline engine uses direct injection of an anti-knock agent to prevent knock as the torque is increased comprising:

• a gasoline engine;
• a source of gasoline;
• a source of the anti-knock agent;
• a direct injector with two sets of nozzles wherein one of the set of nozzles provides gasoline and the other set of nozzles provides the anti-knock agent and:
• wherein a common shaft is used for the direct injection fuel pumps for the gasoline and the anti-knock agent.