Power transmitting apparatus with a torque converter
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorHosei Suzuki
Life of this patent
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Abstract
A torque converter of a power transmitting apparatus includes a pump impeller connected to a crank shaft of an engine via a front cover, a turbine runner opposing thereto and an input clutch switching a relationship between the turbine runner and an input shaft to an engaged or disengaged state of an automatic transmission. A lockup clutch switched to an engaged or disengaged state with respect to the front cover includes a torsion damper provided between an upstream side plate fixed to the lockup clutch and a downstream side plate, in which a clutch drum is provided with an inertial mass at a downstream side of the torsion damper. Thereby, low-frequency sounds or vibrations in the power transmitting apparatus can be reduced.
Claims25
A power transmitting apparatus including:
- a crankshaft of an engine for generating a power;
- an input shaft of an automatic transmission mechanically and coaxially connected to said crankshaft for changing a rotational speed thereof in accordance with operating conditions;
- a torque converter interposed between said crankshaft and said input shaft for smoothly connecting and disconnecting said power;
- a pump impeller directly connected to said crankshaft and included in said torque converter for rotating a fluid therein;
- a turbine runner provided to be opposed to said pump impeller for being rotated by said fluid;
- and
- a lockup clutch directly and coaxially connected to said input shaft for firmly connecting and entirely disconnecting thereof, said lockup clutch comprising:
- a torsion damper assembled in said torque converter for securing a torsion rigidity between said crankshaft and said input shaft;
- and
- an inertial mass provided at a downstream side of said torsion damper,
- wherein said inertial mass lowers a secondary resonance of said power transmitting apparatus.
A power transmitting apparatus, comprising:
- a crankshaft of an engine for generating a power;
- an input shaft of an automatic transmission mechanically and coaxially connected to said crankshaft for changing a rotational speed thereof in accordance with operating conditions;
- a torque converter interposed between said crankshaft and said input shaft for smoothly connecting and disconnecting said power;
- a pump impeller directly connected to said crankshaft and included in said torque converter for rotating a fluid therein;
- a turbine runner provided to be opposed to said pump impeller for being rotated by said fluid;
- and
- a lockup clutch directly and coaxially connected to said input shaft for firmly connecting and entirely disconnecting thereof, said lockup clutch comprising:
- a torsion damper assembled in said torque converter for securing a torsion rigidity between said crankshaft and said input shaft;
- and
- an inertial mass provided at a downstream side of said torsion damper, wherein said inertial mass lowers a secondary resonance of said power transmitting apparatus by approximating an inertia of said downstream side to that of an upstream side of said torsion damper.
An automatic transmission, comprising:
- a plurality of transmission drive gears forming a plurality of transmission gear trains;
- a crankshaft for generating a power;
- an input shaft of said automatic transmission mechanically and coaxially connected to said crankshaft for changing a rotational speed thereof in accordance with operating conditions, wherein said plurality of drive gears are connected to said input shaft;
- a torque converter interposed between said crankshaft and said input shaft for connecting and disconnecting said power;
- a pump impeller directly connected to said crankshaft and included in said torque converter for rotating a fluid therein;
- a turbine runner provided to be opposed to said pump impeller for being rotated by said fluid;
- and
- a lockup clutch directly and coaxially connected to said input shaft for connecting and disconnecting thereof, said lockup clutch comprising:
- a torsion damper assembled in said torque converter for securing a torsion rigidity between said crankshaft and said input shaft;
- and
- an inertial mass provided at a downstream side of said torsion damper, wherein said inertial mass lowers a secondary resonance of said power transmitting apparatus by approximating an inertia of said downstream side to that of an upstream side of said torsion damper.
A power transmitting apparatus, comprising:
- a crankshaft for generating a power;
- an input shaft of an automatic transmission mechanically connected to said crankshaft for changing a rotational speed thereof in accordance with operating conditions;
- a torque converter interposed between said crankshaft and said input shaft;
- a lockup clutch directly connected to said input shaft, said lockup clutch comprising:
- a torsion damper assembled in said torque converter for securing a torsion rigidity between said crankshaft and said input shaft;
- and
- an inertial mass provided at a downstream side of said torsion damper,
- wherein said inertial mass approximates an inertial movement of said downstream side an of said torsion damper to an inertial movement of said upstream side of said torsion damper.
The power transmitting apparatus of 21, wherein said inertial mass is formed by increasing a thickness of said clutch drum.
Dependencies are inferred from the claim text.