Adaptive intake system of diesel engine

Abstract

The invention relates an adaptive intake system of a diesel engine. The adaptive intake system is applied to an exhaust gas turbocharged diesel engine. Before the exhaust gas turbocharged diesel engine provides charging, the engine can take in gas through an intake one-way valve through a bypass gas passage, such that the intake distance is shortened, intake resistance is decreased, intake volumeis increased, and ignition delay can be shortened to relieve vibration; when the exhaust gas turbocharged diesel engine provides charging, the bypass gas passage is closed automatically, and set charging effect is maintained.

Description

Technical field [0001] The invention relates to a diesel engine self-adaptive air intake system capable of alleviating symptoms such as difficulty in starting an exhaust gas turbocharged diesel engine, large vibration due to a long combustion delay period at low speed, and the like Background technique [0002] At present, the known exhaust gas turbocharged diesel engine, when starting, the air intake resistance is relatively large, resulting in insufficient air intake, and the temperature of the compressed air in the cylinder is low and difficult to start; Insufficient air intake, low temperature of the compressed air in the cylinder, long flame retardation period, rough combustion, large vibration, etc. Small, not enough to drive the exhaust turbocharger to generate intake air pressure; at this time, the intake air of the exhaust turbocharged engine has to bypass the exhaust side of the engine and go through the intake turbine, so that the intercooler can enter the intake ...

AI Technical Summary

Problems solved by technology

[0002] At present, the known exhaust gas turbocharged diesel engine, when starting, the air intake resistance is relatively large, resulting in insufficient air intake, and the temperature of the compressed air in the cylinder is low and difficult to start; Insufficient air intake, low temperature of the compressed air in the cylinder, long flame retardation period, rough combustion, large vibration, etc. Small, not enough to drive the exhaust turbocharger to generate intake air pressure; at this time, the intake air of the exhaust turbocharged engine has to bypass the exhaust side of the engine and go through the intake turbine, so that the intercooler can enter the intake air Manifold, due to the long inlet air passage, large and small cross-sectional area of ​​the air passage, and large air flow contact surface, the air intake resistance is obviously greater than that of a naturally aspirated diesel engine. As a result, the exhaust gas turbocharger produces a The actual intake air volume before the pressure effect is obviously less than that of a naturally aspirated diesel engine, and the cylinder pressure and compressed air temperature are lower than those of a naturally aspirated diesel engine when fuel injection is made, which is not conducive to shortening the ignition delay period to alleviate burning shock

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