節(jié)氣門體介紹

節(jié)氣門體在汽油機控制系統(tǒng)中的作用汽油機的工作是將燃油和空氣充分有效地按一定比例混合，通過定時點火燃燒爆炸，然后將爆炸產(chǎn)生的能量通過曲軸向外輸送，怎樣才能根據(jù)不斷變化的需求去組織燃燒，達到最佳的空氣燃油比例？節(jié)氣門體起到了一個重要的作用。首先根據(jù)來自油門踏板的位置提出了對發(fā)動機的扭矩需求，然后ECU根據(jù)這個需求換算成以節(jié)氣門體的開度要求為表現(xiàn)形式的空氣進氣量的要求；最后配之以為達到最佳燃燒效果的燃油供油量，達到最佳的動力性、經(jīng)濟性和排放。The

role

of

throttle

body

in

gasoline

engine

control

systemGasoline

engine"s

job

is

to

fuel

and

air

mixed

in

certain

proportion,

efficiently

by

timingignition

burning

explosion,

and

thensend

the

blast

energy

through

the

crankshaft

to

the

outside,

how

can

according

tothe

changing

needs

to

organize

the

combustion,best

air

fuel

ratio?

Throttle

body

plays

a

important

role.First

of

all,

according

to

the

position

of

the

accelerator

pedal

is

put

forward

on

theengine

torque

requirements,then

converted

to

ECU

according

to

the

needs

to

the

opening

of

throttle

bodydemands

of

air

volume

in

the

form

of;The

final

match

of

the

thought

to

achieve

the

best

effect

of

combustion

of

fuel

oil,to

achieve

the

best

performance,

fuel

economy

and

emissionsCarbon

canisterCamshaft

phaser*Fuel

rail/InjectorCanister

purgevalveAir

massAccelerator

pedal

moduleThrottledevice(ETC)KnocksensorDelivery

module

withlow

pressure

pumpOxygenSensor**MaincatalystCANDiagnosislampDiagnosisinterfaceImmobilizerIntake

manifoldsensorEGR-valve**

optionSource:

GS/VSA

64SpeedsensorPhasesenor

Oxygen

sensorPre

catalyst*Temp.sensorETC

Electronic

Throttle

ControlEOBD

European

On-Board

Diagnosis

SystemRLFS

Returnless

Fuel

Supply

SystemCamshaft

phaser:intake

and/orexhaust

phasing**

Reserve

for

EOBDAir

mass

meter

withIntake

air

temperatureElectroniccontrol

unit系統(tǒng)原理圖(System

principle)1.電子節(jié)氣門體(Electronic

throttle

body)?工作原理：電子節(jié)氣門是電子節(jié)氣門控制系統(tǒng)的一個關鍵部件，它一方面執(zhí)行來自發(fā)動機ECU的指令，調(diào)節(jié)節(jié)氣門開度來控制發(fā)動機的進氣量，從而實現(xiàn)控制發(fā)動機的負荷輸出，同時可以輸出反映節(jié)氣門開度位置的信號，供控制系統(tǒng)監(jiān)控節(jié)氣門工作狀況。電子節(jié)氣門由節(jié)氣門體、驅(qū)動電機和節(jié)氣門位置傳感器等構(gòu)成，來自發(fā)動機ECU的指令使驅(qū)動電機動

作，通過傳動機構(gòu)使節(jié)氣門板轉(zhuǎn)動，保證發(fā)動機工作所需的節(jié)氣門開度。節(jié)氣門位置傳感器由兩個電位器組成，節(jié)氣門開度變化時，電阻值發(fā)生變化，輸出的電壓信號隨之變化，與電子油門踏板位置傳感器信號一起，輸入到發(fā)動機ECU，經(jīng)計算后，輸出驅(qū)動電機控制信號，從而控制發(fā)動機節(jié)氣門開度。同發(fā)動機控制系統(tǒng)一起，電子節(jié)氣門配合工作，可以實現(xiàn)：發(fā)動機怠速控制，車輛巡航控制，Limphome控制，自動變速箱控制，車身電子穩(wěn)定控制（ESP）等功能。Working

principle:

electronic

throttle

is

electronic

throttle

control

system

of

one

of

the

key

parts,

onthe

one

hand,

the

execution

of

the

instruction

from

the

engine

ECU,

adjust

the

opening

of

throttle

tocontrol

the

engine

into

the

air,

so

as

to

realize

control

of

the

load

on

the

engine

output,and

can

reflect

the

position

of

the

throttle

opening

signal

output,

working

condition

monitoring

throttlefor

control

system.Electronic

throttle

by

throttle

body,

drive

motor,

and

throttle

position

sensor,

etc,

from

the

engine

ECUinstructions

that

drive

motor

movement,

through

the

drive

mechanism

to

rotate

the

door

plank

of

solarterms,

to

ensure

that

the

engine

for

the

throttle

opening.

Throttleposition

sensor

is

composed

of

two

potentiometer,

change

the

throttle

opening,

and

the

resistance

valuechanges,

the

output

voltage

signal

changes,

together

with

the

electronic

accelerator

pedal

position

sensor

signal,

the

input

to

the

engine

ECU,

after

calculation,

output

drive

motor

control

signal,

so

as

tocontrol

the

engine

throttle

opening.Together

with

the

engine

control

system,

electronic

throttle

with

work,

can

be

achieved:

the

engine

idlespeed

control,

vehicle

cruise

control,

Limp

home

control,

automatic

transmission

control,

automobile

bodyelectronic

stability

control

(ESP),

etc直流電機在驅(qū)動電流作用下旋轉(zhuǎn)一定角度，通過齒輪傳動機構(gòu)，將直流電機軸的運動傳遞給節(jié)氣門軸，節(jié)氣門軸帶動節(jié)氣門旋轉(zhuǎn)到所需角度，改變進氣通道的截面積，從而控制發(fā)動機的進氣流量。同時，由于節(jié)氣門軸的轉(zhuǎn)動，改變電位計的工作位置，電位計輸出的信號發(fā)生變化，發(fā)動機控制單元根據(jù)信號值可確定節(jié)氣門的具體開度位置反饋，從而精確微調(diào)其位置；電位計為兩個反向信號計組成，一個反映節(jié)氣門的正向開度位置，另一個反映節(jié)氣門的反向開度位置，比較兩個信號計的信號值可相互檢查其工作狀態(tài)，作為判斷是否有失效的一個依據(jù)。Dc

motor

rotation

Angle,

under

the

action

of

a

drive

current

through

a

gear

transmissionmechanism,

transfer

the

motion

of

the

dc

motor

shaft

to

the

throttle

shaft,throttle

shaft

drive

the

throttle

to

the

required

level,

changing

the

cross-sectional

areaof

inlet

channel,

to

control

the

inlet

flow

of

the

engine.

At

the

same

time,because

of

the

rotation

of

the

throttle

shaft,

change

the

working

positionpotentiometer,

potentiometer

output

signal

changes,

the

engine

control

unit

canbe

set

according

to

the

signal

value

of

the

opening

of

the

throttle

on

the

specificposition

feedback,

thus

precise

fine-tuning

its

position;Potentiometer

to

two

reverse

signals

of

meter,

a

positive

reflect

the

throttle

openingposition,

another

reflection

of

the

opening

of

the

throttlereverse

position,

compare

the

two

signals

of

value

can

check

the

working

state

of

eachother,

as

a

basis

for

judging

whether

there

is

a

failure.外形及內(nèi)部結(jié)構(gòu)二條輸出信號線接插件定義及功能電機及機械傳動部分的特性20：140gcm21.7Nm1.5＜0.8A4500rpm210Nm9.5A傳動比：直流電機的轉(zhuǎn)動慣量：常溫下電機扭矩：直流電機電阻：

Ω±0.3Ω電感：0.9mH±0.1mH無負載電流：無負載轉(zhuǎn)速：鎖止扭矩：鎖止電流：212F時的最大恒定電流（有效值）：＜2.5A＜1.5A名義電流（無負載）平均值：電位計供電：

5V±0.2V電阻：1.25kΩ±30%工作電流：ECU內(nèi)帶電阻）線性度（對應點）：10μA（±2%機械最大值UMA，100%/105°不同喉口直徑對應的最小流量和參考的怠速流量（壓差：60kPa±2.5kPa,25℃）響應時間電機斷電后的回位時間性能檢測：

在線測試可選擇以下六個位置檢測其傳感器輸出電壓的百分比：關死位置----最小機械停止位；自由狀態(tài)----安全狀態(tài)；40%的開度；64%的開度；88%的開度；全開位置----最大機械停止位。終檢可選擇以下二點：關死位置---