The pressure in the air intake chamber of the air compressor is much lower than the pressure in the air chamber.

BMW transferred the development focus to the compressed gas in the Asian gas storage tank to make the regulator conduct, and the compressed gas flows through the regulator to the loose pressure mechanism of the cylinder head of the air compressor, so that the loose pressure mechanism acts to open the air compressor. Valve plate. In this way, the air intake chamber of the air compressor communicates with the clearance at the top of the piston. Because the pressure in the intake chamber of the air compressor is much smaller than the pressure in the exhaust chamber, the gas enters the cylinder from the intake chamber and then returns to the intake chamber. At this time, the air tank is no longer inflated, and the air compressor is operated at an empty load. In order to achieve the purpose of unloading. The exhaust unloading is connected to an unloading valve in the exhaust line between the air compressor and the gas storage tank, and the unloading valve can sense the gas pressure of the gas storage tank. Before the pressure reaches the set value, the unloading valve is only equivalent to a one-way valve, so that the compressed gas generated by the air compressor can only flow from the exhaust port of the air compressor to the gas storage tank, and cannot be reversed.

When the pressure reaches the set value, the compressed air senses the unloading valve, so that the bypass passage is opened, the exhaust port of the air compressor is connected to the atmosphere, and the side communicating with the gas storage tank has a single one due to the unloading valve. As a function of the valve, the compressed air of the gas storage tank does not leak due to the opening of the passage of the unloading valve. In this way, the air compressor exhausts into the atmosphere, and the unloading purpose is also achieved. When the air compressor adopts the supercharged air intake and belongs to the air intake unloading type, when the air compressor is unloaded, the piston top clearance communicates with the engine intake cavity through the cylinder head intake chamber, and the suction is still at a high temperature. Gas can not really serve the purpose of unloading. As the engine is running, the temperature of the air compressor will gradually increase, which will reduce the sealing reliability of the loosening mechanism on the cylinder head of the air compressor, and even lose the function of pumping.

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