Patent application number | Description | Published |
20120179435 | Method For Determining A Power Capability For A Battery - A method for determining a power capability for a battery includes the step of defining at least one equation based on a circuit model for the behavior of the battery. The equation includes a plurality of battery parameters, including a battery current. The value of at least one of the battery parameters is measured, and the battery current is solved-for from the at least one equation. A limiting battery current is defined based at least in part on the battery current. A limiting battery voltage is determined, and the power capability of the battery is determined based on the limiting battery current and the limiting battery voltage. | 07-12-2012 |
20150046000 | REAL-TIME FUEL CONSUMPTION ESTIMATION - An engine, electric machine and battery of a vehicle are operated, in certain examples, such that a state of charge of the battery is generally maintained while the real-time fuel consumption is estimated and minimized by the use of route segmentation and a predictive average power calculation. | 02-12-2015 |
20150087475 | REGENERATIVE BRAKING AND TORQUE CONVERTER CONTROL - A method for controlling vehicle regenerative braking includes decreasing regenerative braking, provided a converter clutch is locked, such that regenerative braking torque reaches zero before a converter clutch opens due to vehicle speed reaching a reference speed; decreasing regenerative braking, provided the converter clutch is scheduled to open, such that regenerative braking torque reaches zero before the converter clutch opens due to vehicle speed reaching the reference speed; and braking the vehicle using wheel brakes. | 03-26-2015 |
20150127199 | SPATIAL DOMAIN OPTIMAL ELECTRIC AND HYBRID ELECTRIC VEHICLE CONTROL WITH PATH FORECASTING - A vehicle engine, electric machine and battery are operated, in certain examples, such that a predetermined route is segmented based on varying criteria to determine target battery state of charge at the segment endpoints along the route. The endpoints are a superposition of endpoints defined by predicted powertrain operating mode transitions, predicted vehicle acceleration transitions or predicted road grade transitions along the route. | 05-07-2015 |
20150175149 | SYSTEM AND METHOD FOR ENGINE IDLE STOP CONTROL - A system and method for controlling engine idle stop in a hybrid vehicle balance the extra electrical load imposed on the vehicle during engine stop with the electrical energy saved to achieve net fuel savings. Predictive information is used to determine potential vehicle stops and corresponding stop durations during a time window. To achieve net fuel savings, the engine stop duration time must be long enough for the electrical energy savings to cover electrical load added to the system. If the predicted stop duration time is long enough to yield net fuel savings, engine stop may be initiated. If not, engine stop may be inhibited. | 06-25-2015 |
20150175150 | SYSTEM AND METHOD FOR ENGINE IDLE STOP CONTROL WITH STARTER MOTOR PROTECTION - A system and method for controlling engine idle stop in a hybrid vehicle that uses predictive information to schedule engine stops with relatively longer stop duration time to gain more fuel savings and extend life of starter motor. More specifically, predictive information may be used to determine potential vehicle stop events, along with corresponding stop duration times, within a time window. An engine stop scheduler and/or controller may be configured to schedule stops of longer duration for optimal total engine stop time. Similarly, taking into account constraints imposed by the thermal limits of the motor, engine stop may be inhibited for predicted short events to allow engine stop at later longer stop events. | 06-25-2015 |
20150202964 | HYBRID VEHICLE BRAKING SYSTEM AND METHOD - A vehicle includes a powertrain having an electric machine, and friction brakes configured to resist rotation of a vehicle wheel. The further includes at least one controller programmed to (i) issue a command for the electric machine to apply a regenerative torque to decelerate the vehicle in response to driver braking demand, and (ii) cause both a decay in the regenerative torque and a countervailing increase in the resistance of the friction brakes when vehicle speed is reduced to less than a first threshold such that braking demand is substantially satisfied by only the friction brakes when the vehicle speed is less than a second threshold. | 07-23-2015 |
20150203106 | HYBRID VEHICLE BRAKING LIMIT DETERMINATION SYSTEM AND METHOD - A vehicle includes a powertrain having an electric machine configured to selectively apply regenerative torque to cause deceleration in response to braking demand; the powertrain further including a torque converter configured to decouple the electric machine from wheels of the vehicle. The vehicle is also provided with a controller programmed to, during a regenerative braking event, receive a signal defining a regenerative torque limit, and in response to a fault condition associated with the regenerative torque limit, generate a replacement regenerative torque limit based upon a torque converter open speed to decrease roughness during transitions into and out of regenerative braking. | 07-23-2015 |