Patent application number | Description | Published |
20090255746 | Traction and Stability Control System and Method for a Vehicle with Mechanically Independent Front and Rear Traction Wheels - A vehicle powertrain with mechanically independent sets of front and rear traction wheels has separate motive power units. An electronic control system including traction wheel slip control is electronically coupled to a first motive power unit and to a second motive power unit to separately establish maximum rear wheel traction and maximum front wheel traction. Independent requests are made for an increase or a decrease in wheel torque for one set of traction wheels and an increase or decrease in wheel torque for the other set of traction wheels thereby improving acceleration performance and enhancing vehicle stability. | 10-15-2009 |
20090314255 | ENGINE AUTOSTOP AND AUTORESTART CONTROL - Systems and methods are described for controlling engine operation of an engine that may be shut-down during engine idle stop conditions. The engine may include a high pressure direct injection fuel system. In one embodiment, a method comprises during at least a first fuel rail temperature below a threshold, automatically stopping engine operation during a selected engine idle stop condition; and during at least a second fuel rail temperature above the threshold, maintaining engine operation during the selected engine idle stop condition. | 12-24-2009 |
20130029806 | METHOD AND SYSTEM FOR CONTROLLING AN ENGINE - An engine with a fast vacuum recovery brake booster system is disclosed. In one example, an actuator is adjusted in response to a flow between the brake booster and an engine intake manifold. Operation of the engine and vehicle brakes may be improved especially when the engine is boosted. | 01-31-2013 |
20130030616 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for adjusting operation of a plug-in hybrid electric vehicle responsive to a seasonal grade of the fuel available in the vehicle's fuel tank. If the seasonal grade of fuel in the fuel tank does not correspond to the seasonal grade of fuel mandated during the time of engine operation, a fuel injection amount is adjusted to compensate for differences between seasonal grades of a fuel. | 01-31-2013 |
20130066493 | METHOD AND SYSTEM FOR VEHICLE SPEED CONTROL - Methods are provided for controlling a vehicle speed during a downhill travel. Based on the estimated grade of the downhill travel and further based on an input received from the operator, different combinations of an engine braking torque and a regenerative braking torque are used to maintain the vehicle speed during the downhill travel. A battery rate of charging is also adjusted based on the duration or distance of the downhill travel, as indicated by the operator input. | 03-14-2013 |
20130110374 | METHOD AND SYSTEM FOR ENGINE CONTROL | 05-02-2013 |
20130110376 | METHOD AND SYSTEM FOR ENGINE CONTROL | 05-02-2013 |
20130144481 | SYSTEMS AND METHODS FOR DETECTING ACCELERATOR PEDAL FAILURE - A system for detecting accelerator pedal failure in an accelerator pedal system including a vehicle control system, the pedal failure detecting system having an accelerator pedal; a pedal arm; a sensor configured to interpret a force applied to the accelerator pedal and further configured to transmit a signal as a sensor output to the vehicle control system, wherein the vehicle control system is configured to correlate the sensor output to an accelerator pedal position, and to indicate a failure condition when it is not feasible the to read the sensor output given the accelerator pedal position. A method for detecting accelerator pedal failure conditions in an accelerator pedal system. | 06-06-2013 |
20140066255 | BRAKE APPLY AND RELEASE DETECTION FOR STOP/START VEHICLE - A vehicle is provided with an engine that is configured for automatic shutdown and restart. The vehicle is also provided with a controller that is configured to shutdown the engine in response to brake effort exceeding a first threshold and to restart the engine in response to brake effort decreasing below a second threshold. The first threshold and the second threshold are based on an estimated vehicle mass and a road gradient. | 03-06-2014 |
20140066256 | DYNAMIC FILTERING FOR STOP/START VEHICLE LAUNCH PREPARATION - A vehicle includes an engine configured for automatic shutdown and restart. The vehicle is provided with a controller that is configured to restart the engine when a difference between an actual brake pressure and a filtered brake pressure is greater than a threshold value. The filtered brake pressure is dependent upon a magnitude of the actual brake pressure and a rate of change of the actual brake pressure. | 03-06-2014 |
20140067154 | KINEMATIC ROAD GRADIENT ESTIMATION - A vehicle and a vehicle system are provided with a controller that is configured to generate output indicative of a kinematic road gradient estimation using an extended Kalman filter. The extended Kalman filter includes a system input based on a longitudinal acceleration and an acceleration offset, and a system output based on a predicted vehicle speed. The acceleration offset is based on at least one of a lateral velocity, a lateral offset, and a vehicle pitch angle. The controller is further configured to generate output indicative of a kinematic quality factor corresponding to an availability of the kinematic road gradient estimation. | 03-06-2014 |
20140067155 | DYNAMIC ROAD GRADIENT ESTIMATION - A vehicle and vehicle system are provided with a controller that is configured to generate output indicative of a vehicle mass estimation. The vehicle mass estimation is based on a longitudinal acceleration and a wheel torque when at least one of the longitudinal acceleration, a vehicle speed and a yaw rate indicate an occurrence of a qualified event. The controller is further configured to generate output indicative of a dynamic road gradient estimation based on the vehicle speed, the wheel torque and the vehicle mass estimation. | 03-06-2014 |
20140067224 | WHEEL TORQUE DISTURBANCE SUPPRESSION CONTROL FOR VEHICLE HOLD BEFORE/DURING ENGINE STARTUP - A vehicle-hold control method is used to hold an engine-powered vehicle from rolling backward on a road gradient during an engine start. The engine shuts down when the vehicle is stopped following operation of the vehicle under engine power. The engine is re-started during an engine cranking interval as vehicle wheel brakes are applied. The brakes are released in response to detection of pre-calibrated engine speed characteristics. | 03-06-2014 |
20140163842 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for adjusting operation of a plug-in hybrid electric vehicle responsive to a seasonal grade of the fuel available in the vehicle's fuel tank. If the seasonal grade of fuel in the fuel tank does not correspond to the seasonal grade of fuel mandated during the time of engine operation, a fuel injection amount is adjusted to compensate for differences between seasonal grades of a fuel. | 06-12-2014 |
20140235406 | STOP-IN-PARK CONTROL FOR MICRO-HYBRID VEHICLES - A stop/start system of a micro-hybrid vehicle may selectively initiate an engine auto start in response to a PRNDL gear lever/transmission being moved/shifted out of DRIVE after an engine auto stop and a determination that the vehicle is located, for example, in an intersection or railroad crossing prior to the PRNDL gear lever/transmission being moved/shifted into REVERSE. | 08-21-2014 |
20140236459 | STOP/START CONTROL TO INCREASE MICROHYBRID VEHICLE BATTERY CHARGE - A stop/start system of a vehicle autostops and autostarts an engine and, in response to an identification of a drive cycle destination indicating that the vehicle will remain parked for at least a predefined period of time, prevents autostopping of the engine during the drive cycle to increase a state of charge of the battery above a nominal target state of charge. | 08-21-2014 |
20140244150 | DRIVER COACHING SYSTEM - A driver coaching system may have an input device generating an input signal indicative of a road condition. The system may also include an advisory device determining an output conveyed to a driver and indicative of a fuel efficiency rating based on an actual vehicle speed and an optimum fuel efficient speed. The advisory device may not decrease the fuel efficiency rating when the road condition does not warrant the optimum fuel efficient speed. | 08-28-2014 |
20140257637 | CONTROL FOR STOP/START VEHICLE WHEN APPROACHING CONTROLLED INTERSECTIONS - A controller in a stop/start vehicle may anticipate a vehicle stop and engine shutdown event in response to detecting a vehicle approach to an intersection. The controller may disable a power steering system or otherwise prepare vehicle subsystems for shutdown prior to the anticipated shutdown event. The controller may also enable the power steering system in response to anticipating an automatic restart event. | 09-11-2014 |
20140257677 | STOP/START CONTROL FOR STOP/START VEHICLE IN TURN LANE - An engine of a stop/start vehicle, after the engine has been automatically stopped, may be commanded to automatically restart in response to detecting that the vehicle is in a turn lane based on traffic data in a vicinity of the vehicle such that the engine is automatically restarted before a brake pedal is released and a steering wheel is turned. | 09-11-2014 |
20140257678 | AUTO-STOP CONTROL FOR A STOP/START VEHICLE NEAR WATER - A stop/start vehicle includes an engine and a stop/start system that prevents an auto stop of the engine when a speed of the vehicle is approximately zero in response to the vehicle being located within a specified distance from a body of water or in response to the vehicle being located in a user identified geographic region. | 09-11-2014 |
20140257679 | AUTO-STOP CONTROL FOR A STOP/START VEHICLE AT A SERVICE LOCATION - A stop/start vehicle includes an engine and a stop/start system that prevents an auto stop of the engine when the speed of the vehicle is approximately zero in response to the vehicle being located at a service location or in response to the vehicle being located in a user identified geographic region. | 09-11-2014 |
20150057832 | SENSOR FUSION VEHICLE VELOCITY ESTIMATION SYSTEM AND METHOD - A method according to an exemplary aspect of the present disclosure includes, among other things, arbitrating velocity signals derived from information from a first sensor and a second sensor, estimating a ratio between an actual tire radius and an expected tire radius, and generating a fused velocity estimate based on an arbitrated signal calculated during the arbitrating step and an estimated ratio calculated during the estimating step. | 02-26-2015 |