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Hrovat, MI
Davor Hrovat, Ann Arbor, MI US
| Patent application number | Description | Published |
|---|---|---|
| 20090132141 | TRACTION CONTROL SYSTEM AND METHOD FOR A VEHICLE - A system for a vehicle, comprising of a traction control system for adjusting powertrain output to reduce wheel slip; an input device located in said vehicle configured to identify an environmental condition; and a powertrain controller to control powertrain output based on actuation of a pedal of the vehicle by the driver, where a relationship between powertrain output and pedal actuation is adjusted in response to said input device. | 05-21-2009 |
| 20090150037 | ADAPTIVE TRACTION CONTROL SYSTEM - A method of controlling a traction control system ( | 06-11-2009 |
Davor D. Hrovat, Ann Arbor, MI US
| Patent application number | Description | Published |
|---|---|---|
| 20090186743 | Vehicle Launch Using a Transmission Input Clutch - A method for controlling a transmission input clutch during a vehicle launch includes selecting a subject device that transmits torque between an input and an output, a providing a mathematical model of the subject device, such that the model employing only static relationships of engine speed and transmission input speed to a desired magnitude of torque produced by the subject device, using the model, the current engine speed and the current engine speed to determine the desired torque produced by the subject device, and adjusting the torque capacity of the clutch to the desired torque of the subject device determined from the model. | 07-23-2009 |
| 20100105523 | Vehicle Launch Using a Transmission Clutch - A method for controlling a transmission input clutch during a vehicle launch includes determining a desired clutch torque, a desired engine torque, a desired vehicle acceleration and a desired engine speed, determining a change in clutch torque and a change in engine torque with reference to the first and second errors and current operating conditions, applying to the clutch an updated clutch torque capacity whose magnitude is the sum of the desired clutch torque and the change in engine torque, and producing an updated engine torque whose magnitude is the sum of the desired engine torque and the change in engine torque. | 04-29-2010 |
Davor David Hrovat, Ann Arbor, MI US
| Patent application number | Description | Published |
|---|---|---|
| 20090276141 | Feed-Forward Control in a Fuel Delivery System & Leak Detection Diagnostics - A method for operating a fuel delivery system with a first pressure pump fluidly coupled to a second higher pressure pump and a fuel rail including adjusting pump operation of at least one of the first and second pumps during engine starting, the variation based on engine starting conditions. When the pressure rise during the start is correlated to an expected response, further adjusting pump operation based on measured fuel pressure, and when pressure rise during the start is less than the expected response, further adjusting pump operation independent from measured fuel pressure. | 11-05-2009 |
| 20100012087 | SPARK TIMING ADJUSTMENT BASED ON VEHICLE ACCELERATION - Systems, methods and a processor are provided for adjusting the spark timing of an internal combustion engine. The systems, methods and processor include adjusting the spark timing of an internal combustion engine configured to power a vehicle toward peak torque timing based on an output of a longitudinal acceleration sensor configured to sense a longitudinal acceleration of the vehicle. | 01-21-2010 |
| 20100017096 | VEHICLE STABILITY AND SURGE CONTROL - In one example, a method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting dilution in the combustion chamber of the engine to reduce surge in response to the vehicle acceleration. The dilution may be adjusted by adjusting cam timing, for example. | 01-21-2010 |
| 20100017101 | VEHICLE SURGE AND SPARK TIMING CONTROL - A method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting spark timing in the combustion chamber of the engine in response to a knock indication, and further adjusting spark timing in response to the vehicle acceleration to reduce surge. | 01-21-2010 |
| 20100313847 | VEHICLE STABILITY AND SURGE CONTROL - In one example, a method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting dilution in the combustion chamber of the engine to reduce surge in response to the vehicle acceleration. The dilution may be adjusted by adjusting cam timing, for example. | 12-16-2010 |
Davorin D. Hrovat, Ann Arbor, MI US
| Patent application number | Description | Published |
|---|---|---|
| 20100318279 | SYSTEM AND METHOD FOR CONTROLLING AN ENGINE DURING TRANSIENT EVENTS - Systems and methods for controlling an internal combustion engine include adjusting fuel delivered to a cylinder during a transient event by an amount indexed by number of combustion events after detecting the transient event. A base fueling parameter may be adjusted by an adaptive correction value indexed by combustion events after the transient event is detected, with the adaptive value determined using air/fuel ratio difference of previous combustion events during similar transient operating conditions associated with the same combustion event index number. Ionization sensor signal characteristics may be used to determine actual air/fuel ratios used to determine the air/fuel ratio difference and corresponding adaptive correction values. The adaptive values may be modified in response to a vehicle refueling event based on an amount of added fuel relative to existing fuel in the vehicle fuel tank. | 12-16-2010 |
Davorin David Hrovat, Ann Arbor, MI US
| Patent application number | Description | Published |
|---|---|---|
| 20110184612 | Ratio Shift Control System and Method for a Multiple-Ratio Automatic Transmission - A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. | 07-28-2011 |
| 20110184613 | MULTIPLE-RATIO AUTOMATIC TRANSMISSION CONTROL METHOD AND SYSTEM FOR RATIO UPSHIFTS - A speed ratio shaft control for multiple ratio vehicle transmission has controlled release of an off-going transmission clutch and controlled engagement of an on-coming transmission clutch during a speed ratio upshift, at least one clutch being a friction torque establishing clutch. A controller, using shift-timing software strategy, actively manages in real time a clutch torque level for each clutch so that transient torque disturbances in a transmission torque output shaft are mitigated. | 07-28-2011 |