Car and gas engine, engine ECU, control method for injecting combustion gas

Abstract

The invention provides a car and a gas engine, an engine ECU, and a control method for injecting combustion gas. The engine comprises an air cylinder, an air intake manifold connected with the air cylinder, a pressure sensor used for measuring air pressure in the air intake manifold and outputting signals to the engine ECU, and an in-cylinder direct-injection combustion gas injector. An injection port of the in-cylinder direct-injection combustion gas injector stretches into the air cylinder to inject combustion gas into the air cylinder. The engine ECU is used for determining whether the gas engine is in the heavy-load working condition or not according to an output signal of the pressure sensor such that a combustion gas injection instruction can be sent to the in-cylinder direct-injection combustion gas injector when the engine is in the heavy-load working condition. When the engine is in the heavy-load working condition, the in-cylinder direct-injection combustion gas injector injects combustion gas to the air cylinder and combustion gas injected does not occupy space of an air channel. Therefore, when the gas engine operates in the heavy-load working condition, air intake amount required by the gas engine is not affected, thereby not affecting air intake efficiency of the engine.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an automobile, a gas engine, an engine ECU, and a control method for injecting gas. Background technique [0002] The lack of energy and the deterioration of the global environment have become the focus of attention in the world. With the advancement of science and technology and the development of society, the number of cars in the world has increased year by year, and it has taken up a large amount of limited oil reserves and increased air pollution. degree. [0003] Natural gas engines have been highly valued for their good emission characteristics (almost no particulate emissions), abundant natural gas resources, and high octane number of natural gas. Most of the natural gas engines in the prior art are ignited by the intake port injection spark, and the gas supply method of the natural gas engine is mostly a single injection. This gas injection method makes the mixture ...

AI Technical Summary

Problems solved by technology

Most of the natural gas engines in the prior art are ignited by the intake port injection spark, and the gas supply method of the natural gas engine is mostly a single injection. This gas injection method makes the mixture in the cylinder present a distribution that is lean at the top and rich at the bottom at the moment of ignition, which is not conducive to Reliable ignition and stable combustion of mixture

[0004] There is an existing natural gas engine, which installs a gas injector for injecting natural gas in the intake duct, and the injected natural gas will occupy the space of the intake duct

Especially when the engine is running under heavy load conditions, it requires a large amount of intake air, and because natural gas occupies the space of the intake port, the intake air volume is affected, which in turn affects the intake efficiency of the engine

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