Engine compressed air supply system, engine and engine control method

Abstract

The present invention relates to the technical field of internal combustion engines in hybrid electric vehicles, and in particular to an engine compressed air supply system with the characteristics of compressed air in-cylinder direct injection, an engine and an engine control method. The injection nozzles and high-pressure compressed air nozzles, the injection ports of the high-pressure fuel direct injection nozzles and high-pressure compressed air nozzles are directly located on the top of the combustion chamber, the spark plug and the high-pressure fuel direct injection nozzles are connected with the electronic control module, and the cylinder head of the cylinder block is equipped with Exhaust valve, there is an exhaust valve on the exhaust valve, a camshaft to control the opening and closing of the exhaust valve is also arranged on the cylinder head, a camshaft phase sensor is arranged above the camshaft, and the camshaft phase sensor is connected with the electronic control module , to realize the performance balance of high thermal efficiency and high power output under different rotational speed and load conditions of the engine.

Description

technical field [0001] The present invention relates to the technical field of internal combustion engines in hybrid vehicles, in particular to an engine compressed air supply system, an engine and an engine control method with the characteristics of compressed air direct injection (Air Direct Injection, hereinafter referred to as ADI). Background technique [0002] Traditional internal combustion engines at home and abroad all need to use intake valves and related valve mechanisms to introduce fresh air into the cylinder, so as to form a mixture in the cylinder and ignite the working medium to do work. The mechanical structure of the engine with the intake valve structure is complex, and the single transmission structure cannot realize the opening phase of the intake valve, and the adjustment of the opening lift of the intake valve needs to add a variable intake phase and a variable intake lift mechanism. In order to realize the multi-variable air intake control of the cont...

AI Technical Summary

Problems solved by technology

In terms of air intake volume control, the traditional intake air distribution structure will cause excessive intake resistance loss and pump air loss. The overall length is long, and there are factors such as the turning, variable cross-section, and pressure wave interference of each section of the pipeline; the large pumping loss mainly comes from the small air intake required by the engine when the throttle valve is small, while the traditional The engine air intake system must maintain a high degree of vacuum to achieve the corresponding part-load operating conditions, and maintaining the air intake vacuum degree causes a large amount of pump air work loss

This results in low overall engine thermal efficiency and affects engine fuel economy

If a continuously variable lift valve train is used, the pumping loss can be reduced to a certain extent, but the mechanical structure of the engine is extremely complicated, which has a negative impact on reliability and cost control

[0003] With the large-scale application of hybrid technology, such as the technical solution of internal combustion engine-motor hybrid power, under the driving conditions of the whole vehicle, the working conditions of the hybrid internal combustion engine and the pure internal combustion engine in the form of traditional vehicles have undergone great changes. Moreover, the disadvantages brought about by the traditional engine structure and principle make it difficult to balance fuel economy and cost control

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