Control device of variable valve exhaust tube

Abstract

A control device for a variable valve exhaust pipe, sleeved with a spring (81) between a mounting base (6) and a main support piece (4); the spring is located in a sleeve pipe (52) and extends into a mounting base sleeve pipe (62); both the sleeve pipe and the mounting base sleeve pipe are respectively provided with a magnet (82, 83) on the outer side; a fixing spring (91) is disposed between the magnet and an auxiliary support piece (5) or a mounting base casing (61), such that relatively high-temperature exhaust can be treated; the magnet and the mounting base casing are also provided with a magnetic coil (88) therebetween. On one hand, the length and compression space of the spring are increased, thus improving the adjustable exhaust range of the control device; on the other hand, by means of adding the magnetic coil, the magnetism magnitude of the magnet can be adjusted at any time, thus greatly improving the controllability of the device, therefore not only achieving an automatic maintenance effect and preventing the locking between a hollow shaft and an inner hollow pipe, but also increasing the magnetism of the magnet when the displacement needs to be increased abruptly during such situations as emergency acceleration, thus controlling the spring to quickly compress and open a piston plate to exhaust the gas.

Description

Technical field

[0001] The invention relates to a motor vehicle exhaust pipe device, in particular to a control device for a variable valve exhaust pipe. Background technique

[0002] Due to the current energy shortage, ordinary civilian cars will emphasize fuel saving. Therefore, engineers will increase the exhaust back pressure of the exhaust pipe by various means. This can increase the low-speed torque of the engine and reduce the fuel consumption of the car. It will also limit the maximum horsepower of the engine, because the exhaust pressure will increase greatly when the engine is outputting high horsepower. After the exhaust stroke, a large amount of exhaust gas remains in the cylinder, which will affect the intake efficiency of the next intake stroke. The airflow throughput of the engine is reduced, the rated maximum horsepower of the engine is severely reduced, and the acceleration response of the engine is relatively slow. Moreover, the increase in exhaust pressure wil...

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