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燃油系统(fuel system)

作者:高考题库网
来源:https://www.bjmy2z.cn/gaokao
2021-02-10 23:59
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2021年2月10日发(作者:twins是什么意思)


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燃油系统(


fuel system






燃油系统



fuel


system



Fuel



lift


up


and


put


down


is


called


weight


lifting,


lift


up


and


put


down


is


called


weight.


The


head


must


have


the


courage,


the


rise


should


be


emboldened.


Learning


to


add,


proud


to


be


reduced,


the


opportunity


to


travel,


in addition to lazy to. The three problems of life: thinking,


love, Unrequited love. First, training objective: 1) master


the rapid diagnosis method of oil pressure relief method and


circuit fault 2) master the maintenance method of electric


fuel pump and fuel injector fuel system Two, the content of


training: 1)


the


oil pressure


relief


system 2)


detection


of


vehicle


fuel


system



3)


electric


fuel


pump


inspection


and


testing 4)


inspection


and


testing


of


electromagnetic


injector


Three,


training


equipment,


tools


and


materials Santana


2019,


the


fuel


pump


assembly,


fuel


injector


assembly.


The


oil


pressure


gauge,


digital


multimeter,


manual


vacuum


pump,


injector


cleaning


machine,


common


tools,


with


scales,


containers, cotton yarn, gasoline, wire etc. Four, training


operation:



1,


the


oil


pressure


relief


system



From


the


entrance of the fuel filter pressure relief pipe joint The


pressure relief valve pressure relief The dynamic pressure






1


/


8



relief The injector with pressure relief The manual vacuum


pump with pressure relief Detection of 2, the fuel system of


the car 1) in the power supply voltage is not less than 12V,


switch


off


the


ignition,


remove


the


battery


strap. 2)


pressure


gauge


pressure


relief


after


loading


of


gasoline,


gasoline


pump


power and short circuit. 3) put on the battery strap, the


ignition


switch


is


in


the


ON


position,


the


gasoline


pump


pressure test. If the pressure is too high, then replace the


pressure


regulator;


if


the


pressure


is


too


low,


then


check


the


fuel pump, fuel filter and pressure regulator for leaks. 4)


the


ignition


switch


for


the


OFF


position,


remove


the


fuel


pump


short wiring. 5) to start the engine, the idle state of the


pressure measuring system. If the oil pressure of the system


is


not


in


the


specified


range,


check


the


vacuum


tube


and


pressure


regulator.



6).


Remove


vacuum


hose


from


the


oil


pressure regulating, plug the hose. The test pressure shall


comply


with


the


provisions. 7)


off


after


five


minutes


to


check


the


oil


pressure,


such


as


drop,


check


the


fuel


pump


and


pressure


regulator for leaks. 8) pressure relief, remove the strap,


remove


the


oil


pressure


gauge. 9)


after


loading


complex


leak.


3, the fuel pump test Test the working condition of the fuel


pump


should


ensure


the


battery


voltage


is


normal,


the


gasoline


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pump


fuse


is


normal,


normal


gasoline


filter. 1)


gasoline


pump


circuit check ON (ignition means connected to the ignition


switch),


gasoline


pump


should


be


able


to


hear


the


startup


sound,


if


a


finger


pinch


pipeline


should


be


able


to


feel


the


pressure.


If the fuel pump does not start, should check the fuel pump,


gasoline


and


fuel


pump


relay


control


circuit. OFF


(meaning


the


ignition


switch


off


ignition),


fuel


pump


relay


must


have


action,


otherwise


check


the


fuel


pump


relay


line,


if


the


line


is


normal,


the replacement of fuel pump relay. If the fuel pump relay,


gasoline pump is still not working. The ignition switch is


closed,


with


a


multimeter


measuring


gasoline


pump


power


supply


voltage on the conductor, the voltage value is about normal


battery


voltage


(about


12V).


If


the


voltage


does


not


reach


the


specified value, you need to find and remove the fuel pump


circuit circuit fault; if the voltage reaches the specified


value, take the lead wire colleagues found no gasoline pump


circuit, that electric fuel pump failure, should check the


replacement


of


fuel


pump. 2)


test


gasoline


pump The


ignition


OFF from gasoline pump electric plug. The resistance meter


gasoline pump coil resistance, if not within the specified


scope, then replace the gasoline pump assembly. The power




3


/


8





supply


to


the


gasoline


pump


plus


12V


(note


the


polarity),


check


the running condition of the gasoline pump. If not normal,


replace


gasoline


pump


assembly. Note:


this


experiment


should


be


completed


to


avoid


burning


gasoline


pump


coil


in


10S,


while


the


gasoline


pump


away


from


the


battery. 3)


measuring


gasoline


pump


supply



The


ignition


OFF



The


pressure


relief


after


receiving the pressure gauge on the oil pipe. The hose to the


oil return pipe, and into the cup. The use of joint wire


shorted


fuel


pump


relay


contacts


and


battery


positive


terminal,


the


steam


pump


operation


system


hydraulic


power. The


empty


cup.


The


switch


on


the


gasoline


pump,


make


it


work.


Pump


oil


measurement


within


the


prescribed


time,


compared


to


a


predetermined


value.


If


you


do


not


reach


the


minimum


amount


of


oil, possible causes for the pipeline bending or obstruction,


gasoline pump failure


etc.. Detection of


4. injector


1)


injector inspection, (1) check the working condition of the


fuel injector when the engine is running, touch the injector


or


use


a


stethoscope


to


check


the


fuel


injector,


to


see


whether


the machine work is consistent with the engine speed. If not


normal, check the fuel injection signal ECM output. If the


fuel


injector is difficult


to


close, the method


can


be used


to


check


off


the


fire.


Check


the


action


to


be


fast,


failure


or


long

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