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QC/T 1077-2017

Chinese Standard: 'QC/T 1077-2017'
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Detail Information of QC/T 1077-2017; QC/T1077-2017
Description (Translated English): (Terminology and definition of automatic transmission control for automobiles)
Sector / Industry: Automobile & Vehicle Industry Standard (Recommended)
Date of Issue: 2017-04-12
Date of Implementation: 2017-10-01
Regulation (derived from): Ministry of Industry and Information Technology Bulletin 2017 No.14
Summary: This standard specifies the terms and definitions for the classification of automatic control transmissions for automobiles.

QC/T 1077-2017
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
T 21
Terms of automotive automatic transmission
classifications
汽车自动控制变速器分类的术语及定义
ISSUED ON: APRIL 12, 2017
IMPLEMENTED ON: OCTOBER 1, 2017
Issued by: Ministry of Industry and Information Technology of the
People’s Republic of China
Table of Contents
Foreword ... 7 
1 Scope ... 8 
2 Automotive automatic transmission classifications ... 8 
3 Automatic transmission classifications ... 8 
4 Dual clutch transmission classifications ... 9 
5 Continuously variable transmission classifications ... 11 
6 Automatic manual transmission classifications ... 12 
Terms of automotive automatic transmission
classifications
1 Scope
This Standard specifies the terms and definitions of automotive automatic
transmission classifications.
This Standard applies to the automotive automatic transmission where the
internal combustion engine is the sole source of power.
2 Automotive automatic transmission
classifications
2.1 Automatic transmission, AT
A transmission using a combination of hydraulic transmission and mechanical
transmission to achieve automatic shifting.
2.2 Dual clutch transmission, DCT
An automatic shifting transmission using two sets of clutches to control power
interruption and transmission to achieve no-power interruption.
2.3 Continuously variable transmission, CVT
An automatic transmission that continuously changes the transmission ratio.
2.4 Automatic manual transmission, AMT
An automatic transmission with automatic shifting function based on a manual
transmission.
3 Automatic transmission classifications
3.1 Classification by the type of transmission gear drive
3.1.1 Fixed axis gear drive type automatic transmission
An automatic transmission using fixed axis type gear drive.
A dual clutch transmission where the dual clutch drive actuation system uses
the hydraulic pressure established by the mechanical pump to achieve clutch
separation and combination, thereby realizing power interruption and
transmission.
4.2.2 Dual clutch transmission with electro-hydraulic actuator of
clutch
A dual clutch transmission where the dual clutch drive actuation system uses
the hydraulic pressure established by the motor drive to achieve clutch
separation and combination, thereby realizing power interruption and
transmission.
4.2.3 Dual clutch transmission with electrical motor actuator of clutch
A dual clutch transmission where the dual clutch drive actuation system uses
a motor-driven mechanical structure to achieve clutch separation and
combination, thereby realizing power interruption and transmission.
4.3 Classification by the execution mode of shifting mechanism
4.3.1 Dual clutch transmission with hydraulic shifting actuator
A dual clutch transmission using hydraulic drive to control the transmission
shift actuator for gear shifting.
4.3.2 Dual clutch transmission with electrical motor shifting actuator
A dual clutch transmission using a mechanical actuator of a motor-driven
transmission for gear shifting.
4.4 Classification by the main oil circuit pressure of hydraulic system
4.4.1 Dual clutch transmission with high pressure system
A dual clutch transmission with a maximum pressure of greater than 35 bar
for the main oil circuit in the hydraulic system.
4.4.2 Dual clutch transmission with low pressure system
A dual clutch transmission with a maximum pressure of not greater than 35
bar for the main oil circuit in the hydraulic system.
4.5 Classification by the drive oil pump form
4.5.1 Dual clutch transmission with mechanical oil pump
A dual clutch transmission using a mechanical oil pump to establish oil
A continuously variable transmission with a sub-transmission mechanism.
6 Automatic manual transmission classifications
6.1 Classification by the execution mode of clutch drive
6.1.1 Hydraulic clutch automated mechanical transmission
An automatic manual transmission that separates and combines the clutch by
means of hydraulic drive.
6.1.2 Electric clutch automated mechanical transmission
An automatic manual transmission that separates and combines the clutch by
means of a motor-driven mechanical mechanism.
6.1.3 Pneumatic clutch automated mechanical transmission
An automatic manual transmission that separates and combines the clutch by
means of pressurized gas drive.
6.2 Classification by the gear selecting and gear shifting drive mode
6.2.1 Automated mechanical transmission with hydraulic gear
selecting and gear shifting actuator
An automatic manual transmission that performs gear selecting and gear
shifting operation on the gear selecting and gear shifting mechanism by
means of hydraulic drive.
6.2.2 Automated mechanical transmission with electric gear selecting
and gear shifting actuator
An automatic manual transmission that performs gear selec......
Related standard:   QC/T 1067.1-2017  QC/T 1067.2-2017
   
 
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