Multi-Step Automatic Gearbox

• US 20160230849A1
• Filed: 03/19/2014
• Published: 08/11/2016
• Est. Priority Date: 09/20/2013
• Status: Active Grant

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: MARGRAF, Christoph, SIBLA, Christian, HAUPT, Josef, BREHMER, Martin, BECK, Stefan
• Granted Patent: US 9,803,723 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16H 2003/445 without permanent connection between the input and the set of orbital gears
• CPC Class Codes: F16H 2003/447 without permanent connection between the set of orbital gears and the output
• CPC Class Codes: F16H 2200/0065 the gear ratios comprising nine forward speeds
• CPC Class Codes: F16H 2200/0069 the gear ratios comprising ten forward speeds
• CPC Class Codes: F16H 2200/2012 with four sets of orbital gears
• CPC Class Codes: F16H 2200/2046 with six engaging means
• CPC Class Codes: F16H 2200/2048 with seven engaging means
• CPC Class Codes: F16H 2200/2064 using at least one positive clutch, e.g. dog clutch
• CPC Class Codes: F16H 2200/2094 using positive clutches, e.g. dog clutches
• CPC Class Codes: F16H 3/66 composed of a number of gear trains without drive passing from one train to another
• CPC Class Codes: F16H 3/666 with compound planetary gear units, e.g. two intermeshing orbital gears F16H3/663 takes precedence

Abstract

The invention relates to a multi-speed automatic transmission in planetary design with one drive shaft (AN), one output shaft (AB), four planetary gear sets (RS1, RS2, RS3, RS4) and several shift elements (A to F). A first clutch shaft (3) constantly connects the first planetary gear set (RS1) to the fourth planetary gear set (RS4), a second clutch shaft (5) constantly connects the second planetary gear set (RS2) to the third planetary gear set (RS3), a third clutch shaft (6) constantly connects the third planetary gear set (RS3) to the first planetary gear set (RS1). The drive shaft (AN) is constantly connected to the fourth planetary gear set (RS4); the output shaft (AB) is constantly connected to the third planetary gear set (RS3). The first planetary gear set (RS1) is directly connected to two shift elements (A, B), the second planetary gear set (RS2) is directly connected to four shift elements (C, D, E, F), the third planetary gear set (RS3) is directly connected to two shift elements (C, D), the fourth planetary gear set (RS4) is directly connected to four shift elements (A, C, E, F). The drive shaft (AN) is directly connected to only one shift element (C). The output shaft (AB) is directly connected to only one shift element (D).

Claims

1. Automatic transmission in planetary design, in particular for a motor vehicle, with one drive shaft (AN), one output shaft (AB), with four planetary gear sets (RS1, RS2, RS3, RS4), each of which features three elements (SO1, ST1, HO1;

SO2, ST2, HO2;

SO3, ST3, HO3;

SO4, ST4, HO4), along with six shift elements (A to F), the selective engaging of which brings about different transmission ratio relationships between the drive shaft (AN) and output shaft (AB), whereas

a first clutch shaft (3) constantly connects the first planetary gear set (RS1) to the fourth planetary gear set (RS4),

a second clutch shaft (5) constantly connects the second planetary gear set (RS2) to the third planetary gear set (RS3)

a third clutch shaft (6) constantly connects the third planetary gear set (RS3) to the first planetary gear set (RS1),

the drive shaft (AN) is constantly connected to the fourth planetary gear set (RS4),

the output shaft (AB) is constantly connected to the third planetary gear set (RS3),

the first planetary gear set (RS1) is directly connected to two shift elements (A, B),

the second planetary gear set (RS2) is directly connected to four shift elements (C, D, E, F),

the third planetary gear set (RS3) is directly connected to two shift elements (C, D),

the fourth planetary gear set (RS4) is directly connected to four shift elements (A, C, E, F),

the drive shaft (AN) is directly connected to one shift element (C), and

the output shaft (AB) is directly connected to one shift element (D).

2-43. -43. (canceled)