Abstract: A method for improved engine control is disclosed. The system controls the rate of change of engine RPM, referred to as “ramp rate.” A method provides for controlling the ramp rate of an internal combustion engine including establishing a predetermined rate limit, determining a current engine speed, determining a desired engine speed, and adjusting the speed at or below the predetermined rate limit. In one embodiment, the ramp rate is controlled by an engine control module. The system does not require consideration of vehicle weight. Hence, there is no need for extensive sensors or other means to approximate a vehicle weight. This saves cost and complexity as compared with prior art systems. In another embodiment, the ramp rate control is based on a driver profile or user tier. This allows different ramp rates for different drivers, providing flexibility to have a lower ramp rate for less experienced drivers.

Abstract: A system for providing heat to the dump body of a dump truck is disclosed. The disclosed system is suitable for use with truck equipped with a diesel particulate filter. When enabled, the system controls the exit path of exhaust gas such that it is routed to the dump body during normal operating conditions. In one embodiment, when the diesel particulate filter enters a regeneration cycle, high heat is produced. The system then routes the exhaust gas as to bypass the dump body to avoid heat damage from the higher temperature exhaust gas.

Abstract: A method and system for improving fuel economy in a vehicle. The vehicle is equipped with an internal combustion engine, and a suspension air-spring automatic pneumatic control system. The internal combustion engine is controlled by an electronic engine control module. A load signal representative of the cargo load is generated and fed to the engine control module to cause the engine control module to enter a reduced horsepower mode of operation when the vehicle is less than fully loaded. Alternatively, the load signal is used as a basis for attenuating a fuel demand signal generated by the accelerator pedal deflection when the driver presses the accelerator pedal. The attenuated fuel demand signal is input to the engine control module, causing the engine control module to reduce the fuel consumed by the engine when the vehicle is less than fully loaded.