System for managing engine retarding torque during coast mode op

Details System for managing engine retarding torque during coast mode op System for managing engine retarding torque during coast mode op

1998-05-18

1999-07-13

Wright, Dirk

Interrelated power delivery controls, including engine control

With supercharger

Manifold pressure control

477108, 477121, 477118, 123322, F16H 6100

Patent

active

059218835

ABSTRACT:
A system for managing engine retarding torque during coast mode operation includes a control computer operable in one embodiment to control boost pressure, engine compression brake setting and/or engine accessory deactivation upon detection of coast mode operation with the engine compression brakes enabled. In another embodiment, the control computer is operable to determine a current engine retarding torque value, based either on an estimation thereof as a function of current boost pressure and engine compression brake setting or based on a mass estimation technique accounting for the grade of the road, and control boost pressure, engine compression brake operation and/or engine accessory deactivation to thereby control engine retarding torque upon detection of coast mode operation with the engine brakes enabled. In either case, the control system is operable to manage engine retarding torque so as not to exceed the coast mode torque capacities of any of the drivetrain components, and of the axle assembly in particular.

REFERENCES:
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patent: 5109826 (1992-05-01), Kato
patent: 5121723 (1992-06-01), Stepper et al.
patent: 5393276 (1995-02-01), White et al.
patent: 5393277 (1995-02-01), White et al.
patent: 5401223 (1995-03-01), White et al.
patent: 5409432 (1995-04-01), Steeby
patent: 5609548 (1997-03-01), White et al.
patent: 5655407 (1997-08-01), Dresden, III et al.
patent: 5842376 (1998-12-01), Dresden, III et al.

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