Abstract: An electronic engine control is provided that compensates the engine's power output capability based on the parasitic power load demands.

Abstract: An apparatus and method for determining the performance of a starting system for an internal combustion engine is disclosed. Preferably the system includes an energy supply connected with a starting motor and a charger for charging the energy supply. An electronic controller determines operating characteristics of the energy supply and starting system.

Abstract: In many applications, it is desirable to have work machines automatically maintain a desired speed and heading. Provided is an electronic control connected with left and right hydraulic motor assemblies that drive left and right ground engaging propulsion mechanisms, left and right speed sensors, and on operator input.

Abstract: A control system for use in connection with control systems on construction equipment includes an electronic control module that records pressure sensor signals of a hydraulic pressure sensor and responsively determines whether the pressure sensor has failed.

Abstract: The present invention provides a method and apparatus for detecting a status of a valve, the valve being connected to a fluid circuit. The method includes the steps of establishing an expected value of a characteristic of the fluid of the fluid circuit, determining an actual value of the fluid characteristic of the fluid circuit, and determining a valve status in response to the actual value, and the expected value.

Abstract: A communications bus including a plurality of devices connected with the bus has a self diagnosing capability. When operating in a diagnostic mode, a device will send a known diagnostic data transmission set over the bus, receive the diagnostic data transmission set and compare the data sent with the data received. The device will produce a diagnostics fault in response to the comparison.

Abstract: The present invention provides a method and apparatus for controlling the speed of an engine. The engine has an associated turbo charger and a throttle. The method includes the steps of determining a load characteristic of the engine, determining a change in said load characteristic, and controlling the engine in response to said load change.

Abstract: A selective catalytic reduction emissions control includes a NOx-reducing reagent stored in a vessel. The system includes apparatus and a method for determining when the vessel is empty or when the vessel is filled with a substance other than an acceptable NOx-reducing reagent.

Abstract: An automatic control for operating an engine retarder, service brakes, and an automatic transmission associated with earth moving equipment is provided. The automatic control monitors engine speed and responsively produces control signals to maintain engine speed within predetermined limits.

Abstract: A sensor is positioned to sense the magnetic field strength of a magnet associated with a rotating body. The sensor produces a signal having a sinusoidal output as the magnet rotates with the rotating body. A controller takes a derivative of the output and calculates the rotational velocity of the rotational body as a function of the derivative.

Abstract: A method for controlling delivery of fuel to each cylinder of an engine by adjusting the appropriate fuel valve duration times to each such cylinder based upon a predetermined detonation level. By using the detonation level measurements from each individual cylinder as a controlling parameter, the delivery of fuel to that particular cylinder can be trimmed to achieve the predetermined detonation level. Balancing the detonation level for each such cylinder to a common detonation level likewise produces a substantially identical air/fuel ratio in each such cylinder. The detonation control loop can be initiated at predetermined intervals so as to continuously maintain a balanced air/fuel ratio to each cylinder in any particular engine.

Abstract: An engine controller including programmable interrupt means connected with an engine speed sensor permits the controller to have configurable speed timing interrupts.

Abstract: A generator set controller verifies the status of a synchroscope mode selector to determine whether the generator set controller is operating in a synchroscope mode. When operating in a synchroscope mode, the generator set controller uses an existing display panel to create an indication of the difference between the phase of the power on a power bus and the phase of the power output of the generator.

Abstract: An apparatus and method for varying the current levels of a fuel injection signal used in connection with an electronically controlled hydraulic actuator unit injector fuel system is disclosed. The apparatus and method varies the current level of the fuel injection signal delivered to the unit injector based on sensed engine parameters, which preferably include a sensed pressure of hydraulic actuating fluid and a sensed temperature of the engine.

Abstract: A generator set controller includes a dead bus sensor producing a dead bus signal indicative of a power failure on a power bus that is an input to the controller on a digital input channel. The controller also receives a voltage signal from a phase of a power bus.

Abstract: An electronic unit injector cross-wire detection system for an internal combustion engine including at least two pairs of electronic unit injectors includes a test signal generating device and a signal receiving device. The test signal generating device includes a signal high line and a signal low line, the signal high line connected to a first wiring harness connection location of each pair of electronic unit injectors of the engine for delivering test signals to a first electronic unit injector of each pair of injectors. The signal low line is connected to a second wiring harness connection location of each pair of electronic unit injectors for returning the delivered test signals. The signal receiving device includes at least two pickup coils, a pickup coil holding structure, and a signal monitoring unit.

Abstract: An automatic elevated idle speed control is disclosed for use with an internal combustion engine on a vehicle. The control includes an electronic controller connected with an engine speed determining means, and a sensor that determines the power requirements of a PTO device and produces a signal. The control automatically varies an engine speed command based on the signal.

Abstract: The invention is a method for a cylinder cutout system in a compression ignition engine utilizing a plurality of electronic unit injectors. An electronic controller, in communication with the compression ignition engine, is configured to receive a plurality of sensor signals indicative of current engine operating parameters. In response to the received signals, the electronic controller produces an injector signal. Included in each of the electronic unit injectors is a solenoid, that when activated in response to the injector signal received from the electronic controller, will facilitate injection of fuel to a corresponding cylinder. A predetermined plurality of the electronic unit injectors will be deactivated in response to the injector signal.

Abstract: An engine speed command selector and method of selecting an engine speed command signal from two command signals includes a selector switch having a local and a remote position, a local low indicator, a local high indicator, a local mode indicator and a remote mode indicator; the engine speed command selector permits an operator to change between local and remote mode when a local engine speed command is within a predetermined tolerance of a remote engine speed command and the operator has moved the selector switch to the desired mode position.

Abstract: An earth moving or construction equipment implement control system is disclosed. The control system includes a fuzzy logic controller that is connected to an electro-hydraulic valve. An implement position sensing system senses the height of the implement. A set point is compared to the implement position to produce an implement position error signal which is an input to the fuzzy logic controller.