Abstract: The present invention provides a pulley assembly adapted to transmit torque from a drive pulley to first and second driven accessories. The pulley assembly generally includes a housing and an auxiliary drive component. The auxiliary drive component is rotatably supported by the housing and adapted to be coupled to the first driven accessory. The auxiliary drive component includes first and second annular drive surfaces. The first drive surface is adapted to be drivingly coupled to the drive pulley and the second drive surface is adapted to be drivingly coupled to the second driven accessory.

Abstract: A method of monitoring operation of a dosing system for treating exhaust of an engine includes monitoring a downstream temperature of an exhaust downstream of the dosing system and injecting a dosing agent. A control module determines a temperature differential threshold based on an amount of dosing agent injected and calculates a temperature differential. The control module further evaluates operation of the dosing system based on the temperature differential and the temperature differential threshold.

Abstract: A transmission system for a vehicle includes an automatic transmission configured to automatically change speed ratios between an input member and an output member. An indicator is configured to provide an indication of predetermined speed ratio changes to a driver inside a passenger compartment. A corresponding method is also provided. The method includes establishing a speed ratio, determining that a speed ratio change is appropriate, and generating an indication perceptible to a driver.

Abstract: Methods and apparatus are provided for controlling AC motor torque output. The method comprises the steps of producing a current based on a first comparison of a fundamental output frequency of the AC motor with a predetermined frequency and a second comparison of a magnitude of a commanded current with a predetermined DC current, and supplying the current to the AC motor.

Abstract: In order to provide a modular arrangement, an inverter for an electric traction motor used to drive an automotive vehicle is positioned in proximity with the traction motor. The inverter is located within a compartment adjacent to one end of the electric traction motor and is cooled in a closed system by spraying a liquid coolant directly onto the inverter. The liquid coolant absorbs heat from the inverter and is cooled by a heat exchange arrangement comprising a reservoir with pipes carrying a second coolant from the radiator of the automotive vehicle. In a preferred embodiment, the coolant is collected from the inverter in an annular reservoir that is integral with the compartment containing the inverter. In accordance with one embodiment of the cooling arrangement, heat from the inverter vaporizes the liquid coolant by absorbing heat from the inverter during a phase change from a liquid to a vapor.

Abstract: The present invention provides a method and apparatus for mathematically calculating an optimal transmission input torque value for the inertia phase and the torque phase of a ratio change. Engine output is then altered by an amount necessary to change the actual value of the transmission input torque to the calculated optimal value of transmission input torque. The timing of the clutch elements during the power-on skip through neutral downshift is established by calculating delay periods for the off-going and on-coming clutches such that a predetermined desired shift time is met. The power-on skip through neutral downshift is thereafter adaptively controlled so that aberrations are diagnosed and corrected during subsequent downshifts. The invention is carried out by monitoring engine and/or transmission characteristics including input speed, output speed and shift duration during a downshift and identifying departures from acceptable patterns.

Abstract: A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based on the estimated initial speed. This method can provide smooth startup and/or restart at any speed.

Abstract: A modeling system for a control parameter of a vehicle comprises a first model that formulates the control parameter in terms of linear spline basis functions, coefficients, and knots. A second model is derived according to the first model, includes coefficients that are derived according to the linear spline basis functions, coefficients, and knots, and forms a linear equation for the control parameter. A memory module stores the linear equation. A control module calculates the control parameter according to the linear equation.

Abstract: A method of reducing exhaust emission from a catalytic converter apparatus of a vehicle, the apparatus including at least one catalytic converter, each of the at least one catalytic converter having a catalyst brick positioned within a predefined length of the vehicle. The method includes directing exhaust to pass more than once through the predefined length through at least one of the at least one catalyst brick. The converter apparatus can accelerate catalyst conversion reactions and thus accelerate converter system light-off.

Abstract: A vehicle having an engine that drives a transmission includes a pump that provides fluid to the transmission and a temperature sensor that monitors a temperature of the fluid. The temperature sensor generates a temperature signal. A control module receives the temperature signal and operates the pump to provide the fluid at a first pressure when the temperature signal is below an upper temperature limit. The control module operates the pump to provide the fluid at a second pressure when the temperature signal is above the upper temperature limit.

Abstract: The present invention provides a method adapted to control a hybrid electric vehicle having a primary power source and a secondary power source. The method includes estimating the power capability of the primary power source, and thereafter obtaining a power command from the vehicle's driver. A primary power demand and a secondary power demand which collectively meet the driver power command are then established, and a desired power balance between the primary power demand and the secondary power demand is also obtained. A system power capability is calculated based on the desired power balance and the estimated power capability. The method of the present invention then determines if the driver power command exceeds the system power capability. If the driver power command exceeds the system power capability, the driver power command limited and thereafter the limited driver power command is executed.

Abstract: A fuel control system for regulating fuel to cylinders of an internal combustion engine during an engine start and crank-to-run transition includes a first module that determines a raw injected fuel mass based on a utilized fuel fraction (UFF) model and a nominal fuel dynamics (NFD) and a second module that regulates fueling to a cylinder of the engine based on the raw injected fuel mass until a combustion event of the cylinder. Each of the UFF and NFD models is calibrated based on data from a plurality of test starts-that are based on a pre-defined test schedule.

Abstract: Method and apparatus are provided for job performance support. The apparatus for providing on-the-job performance support of a procedure comprises a memory configured to store performance support data. The performance support data comprises action data, resource data, reference data, procedure data, and assembly data. The apparatus further comprises a processor coupled to the memory and a display coupled to the processor. The processor is configured to access the memory, retrieve the performance support data, and assemble the performance support data to form the procedure. The display is configured to produce a Graphical User Interface (GUI) that visually presents the procedure assembled by the processor. The display is further configured to produce the GUI that visually presents an administrator interface.

Abstract: A control system and method for increasing engine temperature for an engine having a variable nozzle turbo (VNT) is provided. An offset idle module generates an offset idle signal. A normal boost module calculates a normal boost. A supplemental boost module calculates a supplemental boost. An offset boost module generates an offset boost signal for the VNT based on the normal boost and the supplemental boost. A control module adjusts engine idle and VNT boost based on the offset idle signal and the offset boost signal.

Abstract: An engine control system for regulating a torque output of a variable displacement engine includes a first module that calculates a torque modification term based on an engine operating parameter and a second module that determines a desired engine torque and an estimated engine torque. A third module modifies the desired engine torque based on the torque modification term to provide a modified desired engine torque and a fourth module regulates an engine torque output based on the modified desired engine torque and the estimated engine torque when the engine is operating in a deactivated mode.

Abstract: A response time compensation system for controlling engine operation in activated and deactivated modes in a displacement on demand engine includes a LOMA system that regulates pressurized fluid flow to switch engine operation between the activated and the deactivated modes and a count module that monitors a cycle count of the LOMA system. A response factor module determines a response factor of the LOMA system based on the cycle count and a compensation module generates a compensated response time of the LOMA system based on the response factor.

Abstract: A preferred input torque for a hybrid powertrain is determined within a solution space of feasible input torques in accordance with a plurality of powertrain system constraints that results in a minimum overall powertrain system loss. System power losses and battery utilization costs are calculated at feasible input torques and a solution for the input torque corresponding to the minimum total powertrain system loss is converged upon to determine the preferred input torque.

Abstract: A double-ended inverter system for a vehicle having a load, a first energy source, and a first inverter system coupled to the first energy source and adapted to drive the load. The double-ended inverter system further having a secondary energy source, a second capacitor coupled in parallel to the secondary energy source, and a second inverter system coupled to the secondary energy source and adapted to drive the load. A controller includes an output coupled to the first inverter system and the second inverter system for providing at least one pulse width modulated signal to the first inverter system and the second inverter system.

Abstract: A method and apparatus are provided for generating a vehicle control signal that controls a function of a vehicle device associated with a sensed event. The apparatus comprises a first sensor that is configured to provide a first sensor output signal having a first magnitude that approximately corresponds to a sensed event with a first accuracy and second sensor that is configured to provide a second sensor output signal having a second magnitude that approximately corresponds to the sensed event with a second accuracy that is less than the first level of accuracy. The apparatus also comprises a processor that is configured to receive the first sensor output signal, receive the second sensor output signal, calculate a magnitude for the vehicle control signal based on an average of a weighted value of the first magnitude and the second magnitude, generate the vehicle control signal with the magnitude, and provide the vehicle control signal to the vehicle device.

Abstract: The present invention provides a system and method for releasably retaining at least one coil spring. The present invention utilizes a circumferential castellation formed within a housing operable to receive within the notches formed by the castellation a complimentary number of fingers formed from a retainer plate. The retainer plate is operable to hold the coil springs in compression and is fixed in place by an internal snap ring disposed within an inwardly facing circumferential grove formed on the radial inner side of the protruding blocks or dentils formed by the castellation.