US 5,258,651 A · Electrically biased starting reaction device for a power transmission

Abstract

A planetary gear arrangement, which provides a starting device for a power transmission, has an electrically biased reaction member. The reaction member is operatively connected with an electric motor/generator that is selectively controlled to establish a braking force at the reaction member. A fluid operated friction brake is disposed in parallel with the motor/generator to provide a selective fully engaged brake to establish the reaction, or a slipping brake to assist the generator in establishing the reaction at the planetary gear arrangement. A fluid operated clutch is also associated with the planetary gear arrangement to provide a selective 1:1 ratio within the planetary gear arrangement. The planetary gear arrangement cooperates with the park mechanism in the transmission and the motor/generator to provide an engine cranking mechanism which is useful during engine start.

Claims4

Dependent claims

A starting device disposed to transmit power in the form of torque and rotary speed components from an engine to a transmission comprising:

an input member connected to receive power from an engine;
a planetary gear means having a first gear means connected with said input member, a second gear means meshing with the first gear means and operatively connected to an input of a transmission, and a third gear means meshing with said second gear means;
retarding means comprising electrical energy translation means and selectively engageable friction drive establishing means operatively connected with said third gear means including a first element rotatable with the third gear means in a direction opposite to the rotary speed component of the engine and stationary means, said retarding means being operable to control the rotation of said third gear means for establishing a power path from the engine through the second gear means to the input of the transmission;
and selectively engageable clutch means for selectively directly connecting two of said gear means for establishing a direct drive from the engine to the transmission.

1 more element

Dependencies are inferred from the claim text.

Electrically biased starting reaction device for a power transmission

Life of this patent

Electrically biased starting reaction device for a power transmission

Life of this patent

Abstract

Claims4