节气门体介绍

节气门体在汽油机控制系统中的作用汽油机的工作是将燃油和空气充分有效地按一定比例混合，通过定时点火燃烧爆炸，然后将爆炸产生的能量通过曲轴向外输送，怎样才能根据不断变化的需求去组织燃烧，达到最佳的空气燃油比例？节气门体起到了一个重要的作用。首先根据来自油门踏板的位置提出了对发动机的扭矩需求，然后ECU根据这个需求换算成以节气门体的开度要求为表现形式的空气进气量的要求；最后配之以为达到最佳燃烧效果的燃油供油量，达到最佳的动力性、经济性和排放。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系统原理图(System

principle)1.电子节气门体(Electronic

throttle

body)•工作原理：电子节气门是电子节气门控制系统的一个关键部件，它一方面执行来自发动机ECU的指令，调节节气门开度来控制发动机的进气量，从而实现控制发动机的负荷输出，同时可以输出反映节气门开度位置的信号，供控制系统监控节气门工作状况。电子节气门由节气门体、驱动电机和节气门位置传感器等构成，来自发动机ECU的指令使驱动电机动

作，通过传动机构使节气门板转动，保证发动机工作所需的节气门开度。节气门位置传感器由两个电位器组成，节气门开度变化时，电阻值发生变化，输出的电压信号随之变化，与电子油门踏板位置传感器信号一起，输入到发动机ECU，经计算后，输出驱动电机控制信号，从而控制发动机节气门开度。同发动机控制系统一起，电子节气门配合工作，可以实现：发动机怠速控制，车辆巡航控制，Limphome控制，自动变速箱控制，车身电子稳定控制（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直流电机在驱动电流作用下旋转一定角度，通过齿轮传动机构，将直流电机轴的运动传递给节气门轴，节气门轴带动节气门旋转到所需角度，改变进气通道的截面积，从而控制发动机的进气流量。同时，由于节气门轴的转动，改变电位计的工作位置，电位计输出的信号发生变化，发动机控制单元根据信号值可确定节气门的具体开度位置反馈，从而精确微调其位置；电位计为两个反向信号计组成，一个反映节气门的正向开度位置，另一个反映节气门的反向开度位置，比较两个信号计的信号值可相互检查其工作状态，作为判断是否有失效的一个依据。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.外形及内部结构二条输出信号线接插件定义及功能电机及机械传动部分的特性20：140gcm21.7Nm1.5＜0.8A4500rpm210Nm9.5A传动比：直流电机的转动惯量：常温下电机扭矩：直流电机电阻：

Ω±0.3Ω电感：0.9mH±0.1mH无负载电流：无负载转速：锁止扭矩：锁止电流：212F时的最大恒定电流（有效值）：＜2.5A＜1.5A名义电流（无负载）平均值：电位计供电：

5V±0.2V电阻：1.25kΩ±30%工作电流：ECU内带电阻）线性度（对应点）：10μA（±2%机械最大值UMA，100%/105°不同喉口直径对应的最小流量和参考的怠速流量（压差：60kPa±2.5kPa,25℃）响应时间电机断电后的回位时间性能检测：

在线测试可选择以下六个位置检测其传感器输出电压的百分比：关死位置----最小机械停止位；自由状态----安全状态；40%的开度；64%的开度；88%的开度；全开位置----最大机械停止位。终检可选择以下二点：关死位置---