High-pressure gas compression-ignition engine

A high-pressure gas compression-ignition engine, comprising a cylinder block, a piston and a cylinder head, wherein the piston is installed in the cylinder block and sealed by the cylinder head to form a combustion chamber for fuel operation, and the cylinder head is respectively provided with an intake valve linked with an intake passage and an exhaust valve linked with an exhaust passage, wherein the engine further comprises:

• a fuel supply system, in which fuel from a fuel tank is supplied to the combustion chamber of the cylinder block through fuel passages and pressurized by a pump body;
• a fuel injection device, which is arranged in the combustion chamber and used for injecting the fuel into the combustion chamber;
• a compression-ignition system, which is connected to an exhaust duct or an external air source, can recover or suck a part of a tail gas energy discharged from a power stroke of the combustion chamber into the external air source, and store it in a compression-ignition gas storage tank after high-pressure compression, a corresponding cylinder cover is provided with a compression-ignition gas valve assembly which communicates with the compression-ignition gas storage tank through a compression-ignition pipeline, which can inject pre-stored high-pressure gas into the combustion chamber and is used to inject fuel into the combustion chamber during the power stroke.