Vehicle pre-exhaust control system

Abstract

The invention discloses a pre-discharging control system for a whole vehicle, which comprises a pre-discharging control module, wherein the pre-discharging control module is marked with first time and second time; the second time is longer than the first time; if a pre-discharging request signal is received by the pre-discharging control module, an oil pre-pumping signal is outputted to an oil pump, the oil pump is controlled to start pre-pumping oil while outputting an oil pre-injecting signal to an oil injector, and the oil injector is controlled to open; after the outputting of the oil pre-injecting signal is lasted for the first time, the operation of outputting the oil pre-injecting signal to the oil injector is stopped and the oil injector is controlled to close; and after the outputting of the oil pre-pumping signal is lasted for the second time, the operation of outputting the oil pre-pumping signal to the oil pump is stopped and the oil pump is controlled to stop pre-pumping oil. By adopting the pre-discharging control system for the whole vehicle provided by the invention, air can be expelled from a fuel oil pipeline of a new vehicle so as to cause the fuel oil pressure to be the specified pressure, one-step successful starting and fuel oil consumption of the new vehicle are ensured and the carbon deposition of a spark plug is reduced.

Description

technical field [0001] The invention relates to engine technology, in particular to a vehicle pre-exhaust control system, which is used to control the pre-pumping and pre-spraying of the engine oil circuit when a new car of a vehicle factory is off the assembly line. Background technique [0002] In order to ensure the successful start of the vehicle engine, a combustible mixture formed by an appropriate proportion of fuel and air is required. For the engine of the electronic injection control system, the engine control unit (ECU) realizes the adjustment of the fuel injection quantity and the intake air quantity through the control of the fuel injector and the throttle body, so as to form a suitable fuel and air ratio (air-fuel ratio) mixture to ensure a successful engine start. Too large or too small air-fuel ratio is not conducive to the combustion of the mixture, resulting in unreliable starting and starting failure. The ECU's control of the fuel injection volume of the...

AI Technical Summary

Problems solved by technology

[0003] For new cars equipped on the production line, before the first start, the pipeline from the fuel tank to the fuel distribution pipe, including the fuel distribution pipe assembly, is filled with air, which will cause the fuel injector to spray out at the beginning of the first start. It is air, and because there is no formation of flammable mixture, the engine cannot start normally. In the subsequent starting process, as the air is continuously discharged, the fuel pressure gradually builds up. Before the air is completely emptied, because the mixture is less than the theoretical Air-fuel ratio, resulting in poor fuel atomization, unreliable engine starting performance and misfire chatter

This will cause the engine of the new car equipped on the production line to be started several times before it can be successfully started, which affects the production efficiency; at the same time, during the multiple starts of the engine, due to insufficient combustion, it will cause serious carbon deposits on the spark plug, which will affect the spark plug. life, and the carbon deposition of the spark plug will directly affect the starting performance of the vehicle at low temperature

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