Automotive Drive Train Having an Eight-Cylinder Engine

A motor vehicle drive train comprising:

• an eight-cylinder combustion engine (250) comprising a maximum engine torque Mmot,max;
• an engine output shaft or a crank shaft (18);
• a transmission input shaft (66);
• a torque converter device (1) comprising a converter housing (16), a converter lockup clutch (14), a torsion vibration damper (10) and a converter torus (12), wherein said converter housing (16) is non-rotatably coupled to said engine output shaft or crank shaft (18), said converter torus (12) is formed by a pump shell (20), a turbine shell (24) and a stator shell (22);
• said torsion vibration damper (10) comprises a first energy accumulator means (38), a second energy accumulator means (40) and a first component (46), wherein said first energy accumulator means (38) comprises at least one first energy accumulator (44) and said second energy accumulator means (40) comprises at least one second energy accumulator (44), said first energy accumulator means (38) connected in series with said second energy accumulator means (40), said first component (46) is arranged between and connected in series with said first energy accumulator means (38) and second energy accumulator means (40), and said turbine shell (24) comprises an outer turbine shell (26) non-rotatably connected to said first component (46);
• wherein said torque converter device (1) further comprises a third component (62) non-rotatably coupled to said transmission input shaft (66), which in particular adjoins the torque converter device (1), and said third component (62) is connected in series with said second energy accumulator means (40) and said transmission input shaft (66), so that a torque can be transferred from said second energy accumulator means (40) through said third component (62) to said transmission input shaft (66);
• wherein during a torque transfer through said first component (46), a change of said torque transferred through said first component (46) is counteracted by a first mass moment of inertia J1, and during a torque transfer through said third component (62), a change of said torque transferred through said third component is counteracted by a second mass moment of inertia J2;
• wherein a spring constant c1 [in the units of Nm/°] of said first energy accumulator means (38) is greater than or equal to a product of said maximum engine torque Mmot,max [in the units of Nm] of said eight-cylinder combustion engine and a factor 0.014 [in the units of 1/°] and less than or equal to a product of said maximum engine torque Mmot,max [in the units of Nm] of said eight-cylinder combustion engine and a factor 0.068 [in the units of 1/°];
• wherein a spring constant c2 [in the units of Nm/°] of said second energy accumulator (40) means is greater than or equal to a product of said maximum engine torque Mmot,max [in the units of Nm] of said eight-cylinder combustion engine and a factor 0.035 [in the units of 1/°] and less than or equal to a product of said maximum engine torque Mmot,max [in the units of Nm] of said eight-cylinder combustion engine and a factor 0.158 [in the units of 1/°];
• wherein a quotient formed from a sum of said spring constant c1 [in the units of Nm/rad] of said first energy accumulator means (38) and said spring constant c2 [in the units of Nm/rad] of said second energy accumulator means (40) divided by said first mass moment of inertia J1 [in the units of kg*m2] is greater than or equal to 21932 N*m/(rad*kg*m2) and less than or equal to 197392 N*m/(rad*kg*m2);
• and,
• wherein a quotient formed from a sum of said spring constant c2 [in the units of 1/rad] of said second energy accumulator means and a spring constant cGEW [in the units of 1/rad] of said transmission input shaft divided by said second mass moment of inertia J2 [in the units of kg*m2] is greater than or equal to 5614708 N*m/(rad*kg*m2) and less than or equal to 22458833 N*m/(rad*kg*m2).

A motor vehicle drive train comprising:

• an eight cylinder combustion engine (250) comprising a maximum engine torque Mmot,max;
• a torque converter device (1), comprising a converter lockup clutch (14) having a piston (80), a torsion vibration damper (10) and a converter torus (12), said converter torus (12) formed by a pump shell (20), a turbine shell (24) and a stator shell (22);
• wherein the torsion vibration damper (10) includes:
• a first energy accumulator means (38), comprising at least one first energy accumulator (42);
• a second energy accumulator means (40), comprising at least one second energy accumulator (44) and which is connected in series with the first energy accumulator means (38);
• a first component (46), aid first component (46) arranged between and connected in series with said first energy accumulator means (38) and said second energy accumulator means (40);
• wherein said turbine shell (24) includes an outer turbine dish (26), said outer turbine dish (26) nonrotatably connected to said first component (46) through a driver component (50);
• wherein said driver component (50) and/or said first component (46) is configure d with a substantially thicker wall than said piston (80) and/or a substantially stiffer wall than said piston (80) forming an additional mass or forming a large mass moment of inertia J1 acting between said first energy accumulator means (38) and said second energy accumulator means (40), and arranged for torque transfer through said first component (46) and/or through said driver component (50.