Injection strategy of internal combustion-air mixed power device

Abstract

The invention relates to an injection strategy of an internal combustion-air mixed power device, belonging to the technical field of power machinery. The mixed power device adopts an aerodynamic operating mode of starting working condition and low working condition and an internal combustion power mode of middle and high working conditions; when in high working condition, a driven mode which simultaneously uses internal combustion power and aerodynamic can also be adopted. By a fuel oil-air injection strategy, the three work modes are converted to realize mixed power driving. Internal combustion power adopts a compound recycle mode with low compression ratio, high pressure rise ratio and high expansion ratio. By injecting high pressure air into an internal combustion power cylinder with mixed air to promote the further mixture of oil and gas in the cylinder and ignite the mixed air in a compression way, the invention realizes efficient and clean burning within a full working conditionrange and obtains optimal economy and emission. The air of a high pressure air tank is supplied through dragging a compressor by internal combustion power or is directly inflated by a filling station. The mixed power device has much higher economy, emission and dynamic property than common internal combustion power.

Description

technical field [0001] The invention relates to an injection method of an internal combustion-air hybrid power device, which belongs to the technical field of power machinery. Background technique [0002] As we all know, with the increasingly stringent requirements on economy and emissions, people apply a large number of electronic control technology and exhaust after-treatment technology to internal combustion power, which greatly increases the cost of internal combustion power, especially the diesel engine is higher than The fuel injection pressure of 200MPa greatly reduces the reliability of the fuel supply system. On the other hand, take the low-cost in-cylinder purification route, develop an efficient and clean combustion system, and reduce nitrogen oxides (NO x ) and particulate (PM) harmful emissions, and to maintain a high efficiency of internal combustion power, because the ignition phase control problem has been difficult to solve, so far it has only achieved goo...

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Problems solved by technology

[0002] As we all know, with the increasingly stringent requirements on economy and emissions, people apply a large number of electronic control technology and exhaust after-treatment technology to internal combustion power, which greatly increases the cost of internal combustion power, especially the diesel engine is higher than The fuel injection pressure of 200MPa greatly reduces the reliability of the fuel supply system

On the other hand, take the low-cost in-cylinder purification route, develop an efficient and clean combustion system, and reduce nitrogen oxides (NO x ) and particulate (PM) harmful emissions, and to maintain a high efficiency of internal combustion power, because the ignition phase control problem has been difficult to solve, so far it has only achieved good results in low and medium working conditions. Failure to achieve premixed combustion

In 1997, Toyota's Prius hybrid vehicle began to enter the market. In Japan's 10-15 urban working conditions, it can save about half of the fuel, but the addition of generators, motors, batteries and energy recovery devices has increased the cost a lot, and , the number of energy conversions is large, and the path is complex. Internal combustion power-generator-battery (charging / discharging)-motor is a typical energy path of hybrid power

Every time the energy passes through a device, there is a loss of efficiency. It can be said that the desired effect of hybrid power has not been achieved.

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