Paccar Inc.

Nick Hertlein

Charles Wayne Reinhardt Swart

Stephen Anthony Ciatti

Michael D Gerty

Maarten Meijer

Richard Jeffrey Currie

John Bessman

Steve Ciatti

An engine control system for a vehicle includes at least one processor; and a memory, operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor and in response to receiving an engine start signal, cause the engine control system to perform a method, the method including causing a crankshaft of an engine of the vehicle to begin to rotate and to rotate through a first plurality of rotations, and causing, for each combustion chamber of at least one combustion chamber of the engine, an exhaust valve of the combustion chamber to remain in an opened position while the crankshaft rotates through the first plurality of rotations and prior to fuel being injected into the combustion chamber.

Engine control systems and methods for starting an engine

A method includes detecting a diesel engine runaway event in a diesel engine and, in response to detecting the diesel engine runaway event, deactivating all cylinders in the diesel engine such that no combustion occurs in any cylinders of the diesel engine and no cylinders of the diesel engine produce power, wherein deactivating the cylinders of the diesel engine includes mechanically decoupling a camshaft of the diesel engine from inlet valves of the cylinders of the diesel engine, and wherein deactivating cylinders of the diesel engine prevents flow of air from an intake manifold into combustion chambers of the cylinders.

Use of cylinder deactivation to prevent diesel engine runaway

A method for starting a vehicle's engine includes: causing a crankshaft of the engine to begin to rotate and to rotate through a first plurality of rotations; and causing, for each combustion chamber of at least one combustion chamber of the engine, an exhaust valve of the combustion chamber to remain in an opened position while the crankshaft rotates through the first plurality of rotations and prior to fuel being injected into the combustion chamber.

A testing device is capable of testing a NOx sensor in an environment that does not have dew point detection capability. The testing device includes a connector configured to be coupled to the NOx sensor, an output indicator, and circuitry. The circuitry is configured to send an unverified dew point signal to the NOx sensor via the connector and receive a sensor signal from the NOx sensor via the connector. The unverified dew point signal includes an indication that a temperature of the environment is at or above the dew point. The sensor signal includes an indication of operation of the NOx sensor in the environment. The circuitry is further configured to determine a status of the NOx sensor based on the received sensor signal and indicate, via the output indicator, the status of the NOx sensor.

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Bellingham, WA, United States of America

Nick Hertlein