Cummins Inc.

Cummins Engine Company, Inc.

Other

Randal L Bergstedt

Jagdeep I Singh

Martin T Books

Praveen Chitradurga Muralidhar

John P O'Brien

Jeffrey S Rauch

Rohit Saha

Jaideep Prasad

Rajan S Kalirai

Rima Salve

Ian N Alsman

Danny R Baker

Sumit Tripathi

William A Rankin

Dusan M Janic

David L Clark

Richard G Varo

Dmitri V Baraban

Hari Donepudi

Kenneth S Houston

Kevin E Lowe

Eric R Richardson

Larry L Barnett

Bibhu Batchal Mahanta

Chirag Dhirajlal Ambaliya

Sunil Dhulipati

A method includes detecting a change in a loading condition on an engine based on use of an implement system including a pump driven by the engine, an actuator fluidly coupled to the pump, and an implement repositionable with the actuator. The change in the loading condition is detected based on a variation in a command signal from a joystick that controls movement of the implement, an outlet pressure of the pump, a displacement of the pump, and/or an engagement signal of a clutch positioned to selectively couple the pump to the engine. The method further includes commanding a fueling system to increase an amount of fuel provided to the engine and/or an air handling system of the machine to increase an amount of air and/or a boost pressure of the air provided to the engine in response to detection of an increasing loading condition based on the variation.

Intelligent engine and pump controls

Systems and methods for implementing a start-stop feature on a vehicle powered at least in party by an internal combustion engine are described. The method includes receiving, at an electronic control unit ('ECU') of the vehicle, an indication that the vehicle is in line at a drive-thru. The method further includes determining, by the ECU, a number of start-stop events anticipated during the drive-thru. The method includes determining, by the ECU, an approximate stop time for each of the number of start-stop events. The method further includes determining, by the ECU, that a battery of the vehicle has enough remaining charge to power a plurality of vehicle components during implementation of the start-stop feature. The method includes implementing, by the ECU, the start-stop feature in which the internal combustion engine is turned off for at least a portion of the time when the vehicle is stopped.

Communication interface for start-stop systems and methods

An internal combustion engine operatively coupled with a variable load and an electronic control system operatively coupled with the internal combustion engine. The electronic control system is structured to receive an engine speed target value, a first engine speed feedback value, and a second engine speed feedback value. The electronic control system processes the first engine speed feedback value and the second engine speed feedback value to determine a feedforward correction value. The feedforward correction value is determined to correct for first variation between the second engine speed feedback value and the first engine speed feedback value due to variation in the variable load and to distinguish between the first variation and a second variation due to operation of the internal combustion engine. The control system processes the first engine speed feedback value target, the second engine speed feedback value and the feedforward correction value to determine an engine fueling command, and controls fueling of the internal combustion engine using the fueling command.

Engine controls including dynamic load correction

Systems and methods for implementing a start-stop feature on a vehicle powered at least in part by an internal combustion engine include receiving, at an electronic control unit ('ECU') of the vehicle, an indication that the vehicle is in line at a drive-thru; determining, by the ECU, a number of startstop events anticipated during the drive-thru; determining, by the ECU, an approximate stop time for each of the number of start-stop events; determining, by the ECU, that a battery of the vehicle has enough remaining charge to power a plurality of vehicle components during implementation of the start-stop feature; implementing, by the ECU, the start-stop feature in which the internal combustion engine is turned off for at least a portion of the time when the vehicle is stopped

A system for controlling fueling signals provided to a fueling system of an internal combustion engine operates to eliminate the throttle deadband when the engine speed is limited to speeds less than the maximum engine speed. In one embodiment, the engine control module is modified to incorporate an additional throttle factor operable to scale the calculated throttle derived from the operator commanded throttle position. In one aspect of the invention, this throttle factor is a function of the ratio of the difference between a user-requested high idle breakpoint speed and the minimum engine speed, and difference between the minimum and maximum engine speeds. Thus, the relationship between engine speed and throttle input is rescaled to eliminate the deadband. Where this relationship is linear, the present invention essentially alters the slope of the line between the minimum and maximum throttle positions. The resulting rescaled commanded throttle value is then fed to the routines within the ECM that calculate a fueling command as a function of current engine speed and commanded throttle.

System and method for maintaining a constant throttle deadband

A diagnostic system for an engine is provided for which a plurality of annunciators are energized according to particular fault code sequences. A self-diagnosis mode is controlled by use of the vehicle throttle. The self-diagnosis mode can be initiated by a predetermined number of cycles of the vehicle throttle, in which a cycle corresponds to depressing and releasing the throttle beyond upper and lower limits. In one aspect of the invention, a timer is used to determine whether the predetermined number of throttle cycles occurs within a fixed time limit. If not, then the self-diagnosis mode is not activated. Once the self-diagnosis mode is activated, subsequent cycles of the vehicle throttle will increment the annunciators among the sequential fault codes.

System and method for controlling diagnostic annunciators

The present invention relates to an engine governor which interpolates between several fueling power curves based upon throttle position and engine speed. Each of the curves are chosen so as to provide a consistent power rise with decreasing engine speed at throttle positions less than maximum. The curves are chosen so as to eliminate an abrupt transition between the given fueling curve and the 100% fueling curve. This is preferably accomplished by having the fueling curve exhibit a knee at the transition to the 100% fueling curve. This gives the driver an indication that the throttle position will not maintain the desired speed under the current loading conditions, thereby prompting the driver to increase the throttle position, thereby allowing the throttle to be used to simulate infinite gear shifts between actual transmission gear shifts.

Hybrid power governor

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Columbus, IN, United States of America

Randal L Bergstedt