A method and device for adjusting the load of a gasoline engine

Abstract

The invention provides a gasoline engine load adjusting method and device. The gasoline engine load adjusting device comprises a gasoline engine, a throttling valve installed on an air intake pipe of the gasoline engine and an EGR circuit communicated with the gasoline engine. The EGR circuit comprises an EGR valve and an EGR cooler which are connected in sequence. The inlet of the EGR valve is communicated with an exhaust pipe of the gasoline engine. The outlet of the EGR cooler is communicated with the air intake pipe of the gasoline engine. A mixed gas temperature sensor for measuring the temperature of mixed gas is installed on an air intake manifold of the gasoline engine. An EGR cooler electronic circulation water pump is connected between the liquid inlet and the liquid outlet of the EGR cooler and used for controlling the flow of cooling water. The front end of a general air intake pipe of the gasoline engine is provided with an air flow meter for measuring the mass flow rate of the air. The throttling valve, the mixed gas temperature sensor, the EGR cooler electronic circulation water pump, the EGR valve and the air flow meter are connected with a logic control unit. By means of the gasoline engine load adjusting method and device, the economical efficiency when the gasoline engine is partially loaded is improved.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a method and a device for adjusting the load of a gasoline engine. Background technique [0002] Compared with diesel engines, gasoline engines are less economical. The reason is that in addition to the inherent poor anti-knock performance of gasoline fuel, the compression ratio of gasoline engines is low. , and this way of controlling the gasoline engine load will cause the gasoline engine to have a large intake throttling loss at part load, and the intake throttling loss will lead to an increase in fuel consumption, which will lead to poor part-load economy. Exhaust gas recirculation (Exhaust Gas Recycling, hereinafter referred to as: EGR) technology is considered as a technical way to improve the partial load performance of gasoline engines. The introduction of exhaust gas at partial load can supplement the volume space reduced by throttling and relatively increase the throttle valve ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned defects in the prior art, and to provide a technical problem that can solve the economic deterioration caused by throttling loss when the gasoline engine is partially loaded, and can also solve the problem of low fuel work ability when the gasoline engine is partially loaded. , technical problems of poor fuel economy

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