Why does the failure of engine oxygen sensor lead to an increase in fuel consumption?

Oxygen sensor: When the oxygen sensor fails, ECU can't get this information, so it doesn't know whether the injected gasoline quantity is correct. An improper air-fuel ratio will reduce the engine power and increase the emission pollution.

The main raw materials of no-wash flux are organic solvent, rosin resin and its derivatives, synthetic resin surfactant, organic acid activator, corrosion inhibitor, cosolvent and film former. Simply put, it is to dissolve various solid components in various liquids to form a uniform and transparent mixed solution, in which different proportions of various components have different functions.

Composition:

In recent decades, rosin resin flux, which is mainly composed of rosin, resin, halogen-containing activator, additive and organic solvent, is generally used in the welding process of electronic products. Although this flux has good solderability and low cost, the residue after welding is high, and the residue contains halogen ions, which will gradually cause problems such as decreased electrical insulation performance and short circuit.

In order to solve this problem, it is necessary to clean the rosin resin flux residue on the electronic printed board, which will not only increase the production cost, but also the cleaning agent for cleaning the rosin resin flux residue is mainly a compound of fluorine and chlorine.

This compound is an ozone depleting substance in the atmosphere and has been banned and eliminated. There are still many companies that use rosin-based flux and then use cleaning agent to clean it, which is inefficient and costly.