Energy-saving method and device for cylinder replacing work of internal combustion engine

Abstract

The invention discloses an energy-saving method for cylinder replacing work of an internal combustion engine. The air inlet sides of 1 to n-1 cylinders of the internal combustion engine are provided with return-air control valves or inlet/return-air variable valve timing mechanisms and air inlet valves which are controlled by an electronic control unit and can regulate the on-off state or the starting duration along with the change of the rotating speed and the load of the internal combustion engine, so that the cylinders can change between a normal working state and a stop working state; an energy-saving device for cylinder replacing of the internal combustion engine controls the return-air control valves or the inlet/return-air variable valve timing mechanisms and the air inlet valves (1) through the electronic control unit, and the device is formed with the cooperation of check valves so as to finish the energy-saving work of cylinder replacing; the return-air control valves or the inlet/return-air variable valve timing mechanisms and the air inlet valves (1) are arranged on the air inlet sides of the cylinders; and the check valves (2) are arranged at the positions of air inlet manifolds (6), close to the cylinders. Under the condition of low power output, the method and the device can reduce compression stroke, energy consumption of working stroke, improve the energy efficiency ratio of working cylinders, and finally, can greatly reduce the overall energy consumption of the internal combustion engine.

Description

technical field [0001] The invention relates to various industrial internal combustion engines, in particular to an energy-saving method and device for changing the number of working cylinders of the existing internal combustion engines from the original total number of working cylinders to changing the number of working cylinders according to needs. technical background [0002] When the four-stroke internal combustion engine is running, it is the intake stroke, compression stroke, power stroke and exhaust stroke in chronological order. The four strokes are a cycle. In one cycle, only the power stroke generates thrust due to fuel combustion to output power. The other three strokes all lose energy, and the energy loss in the compression stroke is the largest; in the power stroke, the internal combustion engine loses a lot of energy due to the increase in friction and gas leakage caused by the sudden increase in the pressure in the cylinder. [0003] Formula 1: W=W1-W2. [0...

AI Technical Summary

Problems solved by technology

These devices have obvious effects on improving the high-speed performance of the internal combustion engine and reducing the fuel consumption at an economical speed (90 kilometers per hour), but the fuel-saving effect is not significant for urban transportation at a speed of about 50 kilometers per hour. This is what people usually say that these cars are not economical. oil cause

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