Intake and exhaust end double-throttle-valve control method of amount adjusting type supercharged engine and realization mechanism thereof

Abstract

The invention belongs to the field of internal combustion engines, and relates to an adjustment method of worm gear pressurization of an internal combustion engine, in particular to an intake and exhaust end double-throttle-valve control method of an amount adjusting type supercharged engine and a realization mechanism of the intake and exhaust end double-throttle-valve control method of the amount adjusting type supercharged engine. The realization mechanism mainly comprises a gas compressor arranged in an intake system, wherein the gas compressor is connected with a gas inlet of the internal combustion engine, a gas outlet of the internal combustion engine is connected with an exhaust pipe, the exhaust pipe is connected with a worm gear supercharger in series, the worm gear supercharger drives the gas compressor, and the exhaust pipe of the internal combustion engine is provided with an exhaust pipe throttle valve; the exhaust pipe throttle valve and the worm gear supercharger are connected in parallel, and waste gas entering a worm gear front exhaust pipe can be discharged in a bypass mode; the exhaust pipe throttle valve is connected with and controlled by an ECU. The invention further provides a control and adjustment method, the gas loss of the internal combustion engine can be effectively reduced, and economy of fuel is improved.

Description

technical field [0001] The invention relates to the field of internal combustion engines, in particular to a method for adjusting turbocharging of internal combustion engines, in particular to a method for controlling dual throttle valves at intake and exhaust ends of a volume-adjustable supercharged internal combustion engine and its realization mechanism. Background technique [0002] At present, the world is facing a severe energy and environmental crisis, and energy-saving and environmental protection technology has become a hot spot in the research and development of internal combustion engines. Turbocharging technology is widely used because it can effectively improve the enhancement level and fuel economy of internal combustion engines. In terms of the adjustment mode of the internal combustion engine, the supercharged internal combustion engine can be divided into a quality adjustment type and a quantity adjustment type. At this stage, although the number of superch...

AI Technical Summary

Problems solved by technology

When the load of the internal combustion engine gradually decreases, it is necessary to throttle the intake air by reducing the throttle opening to increase the intake resistance and reduce the intake air volume; on the other hand, the exhaust gas still expands at the turbine end to drive the compressor to increase The intake pressure causes the intake system to have two completely opposite effects: the throttling of the throttle valve and the boosting of the compressor. The two inhibit each other, which will increase the pumping loss and reduce the thermal efficiency and fuel economy of the internal combustion engine.

[0005] At present, the turbochargers of many volume-regulated supercharged internal combustion engines are equipped with wastegate valves, and the waste gas release valves will be opened under heavy load conditions, which reduces the thermal efficiency loss caused by the above-mentioned interaction between the throttle valve and the compressor to a certain extent.

But this waste gas release valve is mainly in order to suppress boost pressure, avoid internal combustion engine knocking and reduce the maximum explosion pressure in the cylinder, and does not actively go to control the waste gas release valve and the throttle valve to coordinate with each other to eliminate the aforementioned boost-throttling action

In addition, the built-in bleed valve of the supercharger has a limited opening and cannot be opened under all working conditions. Therefore, although the waste gas bleed valve of the turbo can objectively reduce fuel consumption to a certain extent, the effect is not obvious

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