Intake and exhaust control system and method for a diesel engine

Abstract

The invention discloses an intake and exhaust control system of a diesel engine. The intake and exhaust control system of the diesel engine comprises a flow control part, an acquiring device and a controller, wherein the flow control part is connected between an air storage bottle and an air compressor of a turbocharger, the acquiring device is used for acquiring the air inflow of the air compressor and reflecting state parameters of air demanding quantity of an air cylinder of the diesel engine, and the controller is connected with the acquiring device and is used for acquiring the air demanding quantity of the air cylinder according to the state parameters and controlling the size of an opening of the flow control part according to the air inflow and the air demanding quantity to enable the total air inflow of the air compressor after air supplement to be equal to the air demanding quantity. According to the intake and exhaust control system of the diesel engine, when the diesel engine operates slowly, the air compressor can convey sufficient air to the air cylinder after being supplied with air by means of the air storage bottle, so that oil burning of the air cylinder is achieved fully, large torque is generated, oil consumption is reduced, and exceeding discharging is avoided. The invention further discloses an intake and exhaust control method corresponding to the control system.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a diesel engine intake and exhaust control system and method. Background technique [0002] Turbocharged diesel engines are gradually being widely used in the market due to their advantages such as high specific power and good pollution discharge performance. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of the intake and exhaust system of a turbocharged diesel engine in the prior art. The following briefly introduces the working process of the intake and exhaust system of this structure and its existing defects. [0004] In the prior art, the intake and exhaust system of the diesel engine includes air filter 1', turbocharger 2', intercooler 3' and other components, such as figure 1 As shown, the air in the atmosphere enters the air filter 1' to filter and then enters the compressor 21' of the turbocharger 2', the air compressed by the comp...

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned turbocharged diesel engine has the disadvantage of low-speed characteristics, that is, when the turbocharged diesel engine is running at a reduced speed, the boosted air of the turbocharger 2' is not enough to meet the air volume required for the combustion of the cylinder 100', resulting in Insufficient torque, insufficient combustion, increased fuel consumption, etc., resulting in excessive emissions and aggravated environmental pollution

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