Two-stage supercharging vehicle-mounted air compressor

Abstract

The invention discloses a two-stage supercharging vehicle-mounted air compressor and aims at providing an automotive two-stage supercharging air compressor which is low in power consumption, high in reliability and low in exhaust temperature. The two-stage supercharging vehicle-mounted air compressor comprises a cylinder cover, wherein the cylinder cover is connected with a cylinder body through a valve plate assembly, a crankshaft is arranged under the cylinder body, a primary air cylinder and a secondary air cylinder are arranged in the cylinder body in parallel, and an unloading mechanism is arranged on the valve plate assembly and comprises an unloading hole, a plunger piston, a pin, a rack, a spring and gear. The plunger piston is fixedly connected with the rack through the pin, one end of the plunger piston faces the unloading hole, the other end of the plunger piston is connected with the spring, the rack is meshed with the gear, a cooling system is arranged in the cylinder cover, air discharged by the primary air cylinder is cooled by the cooling system and then flows into the secondary air cylinder. The two-stage supercharging vehicle-mounted air compressor is suitable for modification of brake systems of large automobiles and existing automobiles.

Description

technical field [0001] The invention relates to the field of air compressors, in particular to a two-stage supercharging vehicle-mounted air compressor. Background technique [0002] The braking system of large cars mostly uses air brakes as an auxiliary to increase the braking force. The air compressor is the first energy supply device in the braking system, directly providing the air required by the braking system and generating the air pressure required for braking. . [0003] Most of the existing vehicle air compressors use ordinary single-stage air compressors. Due to their own structural limitations, ordinary single-stage air compressors have the following problems: [0004] 1. With the increase of exhaust pressure, the exhaust efficiency of single-stage air compressor gradually decreases. When the exhaust pressure rises to 12Bar, the exhaust efficiency is about 50%, resulting in high engine power consumption; [0005] 2. The exhaust temperature of the single-stage a...

AI Technical Summary

Problems solved by technology

[0004] 1. With the increase of exhaust pressure, the exhaust efficiency of single-stage air compressor gradually decreases. When the exhaust pressure rises to 12Bar, the exhaust efficiency is about 50%, resulting in high engine power consumption;

[0005] 2. The exhaust temperature of the single-stage air compressor exceeds 200°C. The high temperature will easily cause thermal deformation of the piston assembly of the air compressor, which will increase the partial wear of the piston and the amount of oil discharged with the air, resulting in high-temperature deformation of the cylinder liner and damage to the piston ring. Make the air compressor easy to leak oil, reduce reliability, and cause engine failure;

[0006] 3. The single-stage air compressor is often operated under high-load conditions, which not only greatly reduces the service life of the air compressor, but also increases the power consumption of the engine

Its disadvantages are: only one level of compression, low efficiency, high engine power consumption

Its shortcomings are: 1. The structure is complex, which is inconsistent with the installation size of the existing air compressor, which is not conducive to the transformation of the existing automobile braking system; 2. Compressed air is cooled by heat dissipation, resulting in high temperature, which is easy to cause high-temperature deformation of the cylinder liner Damaged piston rings increase the failure of the air compressor

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