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QC/T 1077-2017 PDF English

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QC/T 1077-2017: Terms of automotive automatic transmission classifications
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QC/T 1077-2017: Terms of automotive automatic transmission classifications

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AUTOMOTIVE INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.50 T 21 Terms of automotive automatic transmission classifications 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 selecting and gear shifting operation on the gear selecting and gear shifting mechanism by means of a motor-driven mechanical mechanism. 6.2.3 Automated mechanical transmission with pneumatic 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 pressurized gas drive. 6.3 Classification by the gear selecting and gear shifting sequence 6.3.1 Automated mechanical transmission without simultaneous gear ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.