System and method of speed-based downspeed coasting management

US8731788B2 · kind B2 · utility

Assignee

• CUMMINS INTELLECTUAL PROPERTY, INC. · US

Inventors

• Vivek A. Sujan · Columbus, US
• Phani Vajapeyazula · Columbus, US
• Kenneth M. Follen · Greenwood, US
• An Wu · Columbus, US
• Barty L. Moffett · Seymour, US
• Howard Robert Frost · Columbus, US

Key dates

• Filing date: Dec 23, 2011
• Grant date: May 20, 2014
• Expiry date: Dec 29, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/84
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A velocity profile can be used in conjunction with vehicle operating condition data to determine a gear shift schedule that mitigates the amount of service brake effort required to slow a vehicle by making optimal use of engine speed, friction and engine brakes. The gear shift point drives the engine to a higher operating speed and greater frictional torque, slowing the vehicle, which can then coast to a desired speed. The gear shift point can be timed to minimize fuel consumption during the maneuver. Thus, a vehicle downshift event is created based on the transmission gear recommendation. The benefit is increased freight efficiency in transporting cargo from source to destination by minimizing fuel consumption and maintaining drivability.