Decompression device for internal combustion engine

A decompression device for an internal combustion engine, comprising a valve rocker shaft bracket and a valve rod, wherein a valve spring is sleeved on the valve rod, and a valve rocker is arranged above the valve rod, wherein the valve rocker shaft bracket is connected to a decompression bracket;

• the valve rocker is movably connected to a valve opening/closing device connected with a control device;
• the valve opening/closing device is a device that, when the valve rocker moves downwards before the internal combustion engine is stopped, the valve opening/closing device receives a control command from the control device to connect with the valve rocker, so that the valve rod cannot arrive at a valve closing position, and the valve is at an open state;
• when the internal combustion engine is started, the valve opening/closing device receives a control command from the control device to keep connecting with the valve rocker for a time, and then disconnect, and the valve rod arrives at the valve closing position;
• the control device is a device which sends a command to the valve opening/closing device to keep connecting or disconnecting with the valve rocker.