Combustion motor and stirling compound engine

Abstract

The invention relates to an engine compounded by combustion motor and stirling engine. Combustion motor and stirling engine are in the same machine body, the exhaust pipe of the combustion motor is connected with the heater of the stirling enging in series, exhaust of the combustion motor is taken as high temperature heat source of the stirling engine, and power produced by the two engines is used for driving the same crankshaft. Working medium in the stirling engine passes through closed circulation loops, each loop is composed of an expanding cavity, a piston, a compression cavity, a heat regenerator, a cooler and a group of heating tubes which are sequentially connected. The processes of working medium when doing work in the circulation loop are the same, namely the working medium absorbs heat of exhaust of the combustion motor and then is expanded in the expanding cavity, the piston is driven to move downward, and the crankshaft is driven to do work. The invention has the characteristic that stirling engine can absorb waste heat of exhaust of combustion motor to the utmost extent. Compared with the traditional combustion motor waste heat recycling device, the invention can cause mean effective power of diesel engine to be increased by 10% under the same fuel consumption condition.

Description

technical field [0001] The invention belongs to engine technology, in particular to an engine composed of an internal combustion engine and a Stirling engine. Background technique [0002] With the shortage of petroleum energy and the stricter emission regulations, the issue of energy conservation and emission reduction has attracted more and more attention. Finding high-efficiency, non-polluting energy, promoting the secondary utilization of energy, and researching methods of energy recovery and conversion are all effective ways to reduce energy waste and improve energy utilization. Only about 1 / 3 of the energy generated by the combustion of fuel in internal combustion engines is effectively utilized, and the rest is lost to the atmosphere, and nearly 1 / 3 of the energy is lost by exhaust gas. Therefore, the effective use of the exhaust gas energy of the internal combustion engine is a powerful measure to save energy, reduce emissions, and improve the thermal efficiency of ...

AI Technical Summary

Problems solved by technology

However, each of these methods has its limitations

Supercharging technology can only use part of the energy of the exhaust gas, and the exhaust gas at the outlet of the turbine still has a high temperature, which has reuse value; waste heat air conditioning technology has no work output, and the energy utilization rate is low; thermoelectric power generation is limited by materials With the development of other technologies, the efficiency of thermoelectric conversion is low; the use of Rankine cycle to recover the energy of exhaust gas, the system is complicated, and the volume and weight are difficult to meet the requirements

The structure of the Stirling engine is compact, but the efficiency of the currently used Stirling engine to recover the waste heat of the exhaust gas of the internal combustion engine is still low. The proposal of the present invention can make the waste heat of the internal combustion engine more fully utilized, improve the thermal efficiency of the engine, and significantly reduce the heat loss of the engine. Improve fuel consumption and improve engine power

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