Abstract: Methods and systems for controlling a fuel tank isolation valve coupled to a fuel tank in a vehicle are disclosed. In one example approach, a method comprises, in response to a refuel request, actuating a fuel tank isolation valve to vent a fuel tank for refueling; and, in response to a pressure in the fuel tank below a threshold pressure after a predetermined time duration, discontinuing actuation of the fuel tank isolation valve to seal the fuel tank.

Abstract: Methods and systems are provided for improving canister purging during the limited engine operation time in a hybrid electric vehicle. Prior to a transition into an engine-on mode, a canister heater is operated to heat the canister to an optimum temperature based on vehicle operating conditions. Upon transition into the engine-on mode, fuel vapors released from the heated canister are purged to an engine intake.

Abstract: A driving pattern based plug-in hybrid electric vehicle (PHEV) energy consumption preplanning process enables a PHEV trip-oriented energy management control (TEMC) to utilize scalable levels of available trip foreknowledge in order to optimize the onboard energy (fuel and electricity) usage. The preplanning process generates an optimal battery state-of-charge (SOC) depletion profile for a given trip to be traveled by a PHEV. The preplanning process may generate the battery SOC profile using a driving pattern based dynamic programming (DP) algorithm. The TEMC controls the onboard energy usage in accordance with the battery SOC profile, which is optimized for the trip. The preplanning process makes use of spatial domain normalized drive power demand (SNDP) (or S-NDP) distributions in which each set of distributions is indicative of a respective driving pattern. The trip foreknowledge is used to select the driving pattern best representative of the driving process for the trip.

Abstract: An apparatus includes a deceleration definition module that interprets a target deceleration rate, a deceleration detection module that identifies a vehicle deceleration event, and a deceleration quality module that identifies a deceleration improvement opportunity in response to the target deceleration rate and the vehicle deceleration event. The apparatus further includes an operator feedback module that provides a specific operator guidance in response to the deceleration improvement opportunity.

Abstract: An apparatus for selecting operating conditions of a genset, the apparatus including a processor circuit configured to select a set of operating points from a plurality of operating points of the genset each comprising an engine speed in a generator electrical output value and a plurality of cost values associated with operating the genset at respective operating points such that the sum of the cost values associated with the operating points in said set is minimized and such that the engine speed increases or decreases monotonically with monotonically increasing or decreasing electrical power output values.

Abstract: A regenerative braking system for a vehicle utilizing diversion of energy for efficient use or maintaining consistent vehicle performance. The regenerative braking system includes a generator for producing regenerative energy during slowing and includes switches connected to a battery and a plurality of devices. A processor is connected with the battery and the switches for controlling the configuration of the switches based on a characteristic of the battery. If the battery has a state of charge exceeding a predetermined threshold, the processor controls the switches to route the regenerative energy to the other devices. The processor also controls the switches to provide regenerative energy to specific devices where it may most desirably be utilized. Heating and cooling units of the vehicle may be alternatively or simultaneously connected to receive the regenerative energy for providing consistent vehicle slowing performance when the battery state of charge exceeds the predetermined threshold.

Abstract: A hybrid vehicle includes an internal combustion engine; a rotating electrical machine that rotates an output shaft of the internal combustion engine; and a control unit that performs automatic stop control for the internal combustion engine. The control unit causes the output shaft to rotate using the rotating electrical machine, when a stop period of the internal combustion engine according to the automatic stop control is equal to or longer than a first period.

Abstract: A vehicle control system, a server and a vehicle control device which improve energy efficiency of a vehicle based on the information of other vehicles is provided. The system includes a first energy information acquiring mechanism that acquires energy information indicating the energy efficiency of the vehicle including at least accelerator pedal opening information, an identification mechanism that identifies the vehicle of good energy efficiency among a plurality of vehicles based on the energy information, and a drive system control mechanism that controls the drive system of the own vehicle based on the accelerator pedal opening of the other vehicle that has been identified as energy efficient.

Abstract: A load application means, which applies a load to an engine such that a temperature of exhaust gas is raised to a temperature required to burn particulate matter, is comprised of an electric load application means for applying the load to the engine to raise the temperature of the exhaust gas by operating an electric assist motor to generate electric power and a hydraulic load application means for applying the load to the engine to raise the temperature of the exhaust gas by increasing a delivery pressure of a variable displacement hydraulic pump, and a selection control unit is provided for performing control processing to selectively actuate the electric load application means and/or the hydraulic load application means.

Abstract: The subject invention is directed to a method and system for generating an improved fuel mileage value for a powered vehicle. Said method and system take into account real-time operational parameters of a vehicle, such as the rate of fuel consumption, vehicle velocity, vehicle acceleration and deceleration, the kinetic and potential energy of the vehicle, and the energy recovered by regenerative braking. In one set of applications, the improved fuel mileage value generated by said method and system provides timely and positive feedback and psychological reinforcement to vehicle operators to encourage fuel-efficient vehicle operations. Such feedback and psychological reinforcement are especially valuable when a regenerative vehicle braking system is being used. Said value can also provide feedback of the operational efficiency to an automated or semi-automated throttle and/or braking system.

Abstract: Systems and methods for operating a battery pack supplying power to propel a vehicle are disclosed. One example method comprises, adjusting a battery pack state of charge window in response to vehicle mass. Adjusting the battery pack state of charge window in response to vehicle mass may allow the battery pack to provide an increased amount of energy to a motor so that the motor may provide torque to a driveline for a longer period of time and/or absorb more vehicle generator produced power during vehicle operations.

Abstract: Methods and systems are provided for displaying a recommended engine fuel fill amount to an operator of a plug-in hybrid electric vehicle. In one example, the recommended engine fuel fill amount is determined based on an actual amount of fuel consumed over a particular duration and displayed to an operator of the vehicle with a low fuel warning.

Abstract: A vehicle capable of traveling using electric power from a power storage device mounted thereon has an ECU executing, when traveling by electric power from the power storage device: the step of calculating a reference electric consumption based on an average operating point determined by an average vehicle speed and average driving force for every predetermined period; the step of calculating an actual electric consumption based on power consumption and travel distance during the period; the step of calculating a predicted electric consumption by a smoothing processing based on the reference electric consumption and actual electric consumption; and the step of calculating an allowed travel distance RMD that the vehicle can travel by the electric power remaining in the power storage device, based on the predicted electric consumption and the SOC of the power storage device.

Abstract: A system and method for managing power in a vehicle is provided herein. The vehicle includes a battery, an electric motor, and a plurality of electric devices. The electric motor is operable to drive the vehicle. The battery provides power to the electric motor and each of the electric devices. A first sensor is operable to detect the amount of power each of the electric devices is consuming and a display is operable to provide the power consumption for each of the electric devices and the battery power. Accordingly, the user is able to identify and manage how the battery's power is being distributed during the operation of the vehicle.

Abstract: The invention relates to a method (40) for operating a battery arrangement (14) of a motor vehicle (10), in particular a traction battery of the motor vehicle (10), wherein expected environmental conditions and/or use parameters of the motor vehicle (10) are determined (42), wherein an expected withdrawal of energy from an electrical energy store of the battery arrangement (14) is determined (44), wherein a heat loss of the battery arrangement (14) is calculated (46) on the basis of the expected withdrawal of energy, wherein a temperature profile (30) of the battery arrangement (14) is predicted (48) on the basis of the calculated heat loss and the expected environmental conditions and/or use parameters, and wherein a temperature of the battery arrangement (14) is set (54) on the basis of the predicted temperature profile (30).

Abstract: In a hybrid vehicle that is in a four-wheel drive system based on FF layout and that is switchable between a two-wheel drive state and a four-wheel drive state by an electronically controlled coupling 10, the electronically controlled coupling 10 is controlled to a release side when an engine 1 is started in an EV-4WD travel state so as to reduce the transmission amount of engine torque to a drive system of a side of rear wheels 8L and 8R.

Abstract: An electric vehicle includes a transmission, motor, rechargeable energy storage system (RESS), auxiliary power unit (APU), and a controller. The APU has a pair of rings, at least one of which rotates with respect to the other. One ring is coaxial with and radially within the other. Ring rotation generates current in windings. A gear element is in driving connection with the rotatable ring. The APU includes an engine disposed radially within the inner ring, and a power takeoff mechanism coupled to the gear element. The controller energizes the APU to rotate a ring. A method includes positioning the APU in a vehicle body compartment, affixing an outer ring of windings to a compartment wall, and positioning a rotatable inner ring having permanent magnets radially within and coaxial with the outer ring. The engine is positioned radially within the inner ring. A power takeoff mechanism connects to the inner ring.

Abstract: The invention relates to an engine operation start control device of a hybrid vehicle comprising a power output device having an internal combustion engine and an electric motor. In this hybrid vehicle, an intermittent control for intermittently operating the engine can be performed and when the operation of the engine is started during the intermittent control being performed, a cranking of the engine is performed until the engine speed reaches a target engine speed. According to the invention, in case that the operation of the engine is started when the speed of the hybrid vehicle is higher than or equal to a predetermined speed and a power required for the power output device is larger than or equal to a predetermined power, the engine speed, which increases as the speed of the hybrid vehicle increases, is set as the target engine speed.

Abstract: A method for controlling regenerative braking of an automobile micro-hybrid system is disclosed. The system includes at least a rotary electrical machine and an electrochemical battery. The method includes a step, when the electrochemical battery has a first predetermined energy state, which corresponds to an initial optimum charging state, of commanding a reduction of the first energy state, to a second energy state corresponding to an intermediate charging state, so as to make a charging capacity available in the electrochemical battery during a subsequent opportunity for recovery of electrical energy during, for example, a braking phase of the vehicle.

Abstract: Provided is a hybrid construction machine capable of preventing overcharge, comprising: an engine; a generator-motor; a hydraulic pump; a hydraulic actuator to be operated by the hydraulic pump as a hydraulic pressure source; an actuator regeneration section to make a regenerative action of generating actuator regenerated-electric-power through return fluid from the hydraulic actuator; an electric storage device; a charging-rate detector; and a control section. The control section performs: causing the electric storage device to be charged with electric power generated by the generator-motor and the actuator regenerated-electric-power; causing the generator-motor to make a motor action through electric power stored in the electric storage device to assist the engine; and a regeneration control including stopping the generator action and restricting the actuator regenerated-electric-power, when a detected charging rate of the electric storage device is not smaller than a preset charging-rate limitation value.

Abstract: Methods and systems are provided for extending an engine-off period of a hybrid vehicle while reducing engine cold-start emissions. During an engine pull-up to meet operator demand, the engine is held at a higher power for a longer duration to aggressively heat the exhaust catalyst. Subsequently, the engine is pulled up to a lower power and held at the lower power for shorter bursts of time to activate the exhaust catalyst.

Abstract: One embodiment relates to a hybrid vehicle drive system for a vehicle including a first prime mover, a first prime mover driven transmission, a rechargeable power source, and a PTO. The hybrid vehicle drive system further includes a hydraulic motor in direct or indirect mechanical communication with the PTO and an electric motor in direct or indirect mechanical communication with the hydraulic motor. The electric motor can provide power to the prime mover driven transmission and receive power from the prime mover driven transmission through the PTO. The hydraulic motor can provide power to the prime mover driven transmission and receive power from the prime mover driven transmission through the PTO.

Abstract: A lifting vehicle having two axles with respective differentials; a constant-velocity, universal joint drive connecting the differentials; a telescopic arm; and a hydraulic circuit powered by a hydraulic pump to operate the telescopic arm.

Abstract: In order to operate a hybrid vehicle, a mode is provided in which adjustment to the remaining electrical range is performed, specifically said remaining range is kept substantially constant. For example, the driver of the vehicle can continuously maintain the currently determined remaining electrical range by activating an activation element, in order to be able to retrieve said remaining electrical range later for purely electric driving, for example in a low emission zone. Adjustment to the remaining electrical range is more appropriate than the previously known adjustment to the charge state of the battery, because the vehicle driver can better plan his trip.

Abstract: In a control apparatus for controlling front-wheel and rear-wheel rotating electrical machines capable of driving front and rear wheels of a vehicle on electrical power of a battery, a command torque determinator determines command torques for the rotating electrical machines based on a predetermined torque distribution ratio, a power distribution ratio calculator calculates a power distribution ratio based on the torque distribution ratio, an outputtable torque calculator calculates outputtable torques of the rotating electrical machines, a power distribution ratio corrector corrects the power distribution ratio based on the outputtable torques, and a power distributor distributes the electrical power of the battery between the rotating electrical machines in the corrected power distribution ratio.

Abstract: A system and method for determining functionality of a single signal wire actuator of a vehicle monitor the signal wire for a heartbeat signal after commanding the actuator and waiting for a self-diagnostic period. In one embodiment, a hybrid vehicle includes an engine, an electric heater, a heater core and a valve positioned to route coolant through an engine and/or an electric heater. An actuator positioned to circulate coolant through the electric heater and the heater core is configured to transmit a heartbeat signal while connected to a power source and a ground terminal. A vehicle controller may be configured to store a diagnostic code, start the engine and/or control the valve to selectively route coolant through the engine and the heater core in response to a heat request and the heartbeat signal not being received from the actuator within a predetermined interval of time.

Abstract: Methods and devices for controlling a vehicle electric coolant pump include operating the coolant pump at a speed to provide a desired coolant flow based on a temperature difference between an engine coolant inlet temperature and an engine coolant outlet temperature. A hybrid vehicle having an engine and an electric water pump includes a controller that controls water pump speed to provide coolant flow based on a differential temperature between an engine coolant inlet and an engine coolant outlet. Pump speed may also be controlled based on engine speed and load. Control of an electric water pump based on temperature difference, engine speed, and load may result in faster engine warm up and reduce pump power consumption.

Abstract: An operation includes disabling a vehicle from moving while connection status of the vehicle with external charging infrastructure is unknown. A message is generated to advise a user to check the connection status. The vehicle is enabled to move upon a user indication that the vehicle is disconnected from the charging infrastructure.

Abstract: An example method for selecting between modes of regeneration of an energy storage device of a vehicle includes: determining operating conditions of the vehicle; and when regeneration is appropriate based upon the operating conditions, regenerating the energy storage device, including selecting between a nonperformance-impacting regeneration mode and a performance-impacting regeneration mode.

Abstract: A system and method for controlling an electric vehicle include at least one controller configured to detect an over-voltage condition when an electric-machine voltage exceeds an over-voltage threshold. In response to the over-voltage condition, the electric machine and a variable voltage controller (VVC) are disabled. Upon determining the electric-machine voltage is decreased to at least a second threshold being less than the over-voltage threshold, the controller is configured to set the VVC to a limited-operation mode. Upon determining the electric-machine voltage is decreased to at least a third threshold being less than the second threshold and the over-voltage threshold, the controller is configured to re-enable the electric machine and set the VVC to a normal-operation mode. The limited operation-mode enables the vehicle to maintain vehicle propulsion during the drive-cycle as the electric machine is recovered from a transient condition causing the over-voltage condition.

Abstract: There is provided an electrically driven working vehicle that needs reduced assisting power from an electrical storage device when accelerating subsequent to modulation and still obtains acceleration at least equivalent to that of torque converter vehicles. The electrically driven working vehicle has an engine 1, a generator motor 5 connected mechanically to the engine 1, a generator inverter 6 for controlling the amount of power generated by the generator motor 5, a traveling motor 7 for driving a vehicle body, an electrical storage device 3 connected electrically to the generator inverter 6 and to the traveling motor 7, and a forward/reverse switching device 103 for switching the traveling direction of the vehicle body.

Abstract: Provided is a method of driving a vehicle including: monitoring a power status of the vehicle; and if, during the monitoring the power status of the vehicle, a power failure is detected and a first acceleration command is received, controlling the vehicle to travel at a first speed corresponding to the first acceleration command.

Abstract: In hybrid construction machine employing a hydraulic motor and an electric motor for the driving of the swing structure, satisfactory operability of a combined operation of the swing structure and other actuators is secured irrespective of the operating status of the electric motor. A control device of the hybrid construction machine executes control selected from: hydraulic/electric complex swing control for driving the swing structure by total torque of the electric motor and the hydraulic motor when a swing operating lever device is operated; and hydraulic solo swing control for driving the swing structure by the torque of the hydraulic motor alone when the swing operating lever device is operated.

Abstract: Provided is an electric power control apparatus capable of suppressing charge/discharge with respect to an electrical storage device under an anomalous condition. The electric power control apparatus includes an electrical storage device including electrical storage modules, a module-temperature detection section, a temperature-condition judgment section, an adopted-module-temperature selection section, and a charge/discharge-electric-power-upper-limit setting section. The temperature-condition judgment section makes a judgment on a temperature condition of the electrical storage device based on a temperature detected by an electrical-storage-device temperature detection section.

Abstract: A vehicle has a first partial onboard power supply system and a second partial onboard power supply system which is electrically connected with the first partial onboard power supply system at at least a first nodal point. The first partial onboard power supply system includes a first group of electric consumers and the second partial onboard power supply system includes a second group of electric consumers. The first partial onboard power supply system includes a starter, an onboard power supply system accumulator connected parallel to the starter and a first switch between the first group of consumers and the onboard power supply system accumulator. The second partial onboard power supply system includes a first direct-voltage controller, an electric support accumulator connected parallel to the second group of electric consumers at a second modal point, and an interface of the first direct-voltage controller connected with the second nodal point.

Abstract: Methods and systems for fuel system leak detection are disclosed. In one example approach, a method comprises, in response to a pressure change in a fuel tank less than a threshold for a duration during engine-off conditions while the tank is sealed off from atmosphere, indicating a leak condition, and in response to a pressure change in the tank greater than the threshold during engine-off conditions while the tank is sealed off from atmosphere, indicating a no-leak condition.

Abstract: A torque applied to a one-way clutch when a first motor generator and second motor generator are operated in a motor generator drive mode is restrained or prevented from becoming excessively high by setting a first motor generator sharing ratio in response to a driving torque target for the vehicle, by controlling operation of the first motor generator in response to a first motor generator first sharing ratio when vehicle vibrations due to cogging torque are likely to take place, and by reducing the torque from the first motor generator when the driving torque target is large. Torque applied to the one-way clutch which otherwise would become excessively high immediately after engine shutdown, is restrained or prevented by reducing the torque from the first motor generator in response to a second motor generator second sharing ratio when engine downtime is short.

Abstract: The present invention provides a working vehicle, including a power source unit, an air intake passage, and an air exhaust passage all of which are arranged inside a roof portion, wherein the power source unit is disposed in a portion close to a center in a vehicle body width direction, the air intake passage guides air taken from an air intake port that is provided in a center portion in the vehicle body width direction, to the power source unit, and the air exhaust passage is bent in a planar view such that air supplied to the power source unit flows in a bent manner toward an air exhaust port that is provided in one end portion in the vehicle body width direction.

Abstract: Methods and systems for controlling a fuel tank isolation valve coupled to a fuel tank in a vehicle are disclosed. In one example approach, a method comprises, in response to a refuel request, actuating a fuel tank isolation valve to vent a fuel tank for refueling; and, in response to a pressure in the fuel tank below a threshold pressure after a predetermined time duration, discontinuing actuation of the fuel tank isolation valve to seal the fuel tank.

Abstract: A method of storing energy produced by a mobile vehicle is disclosed. The method may include receiving information on a vehicle trip profile. An electrical mode of a traction motor configured for propelling the vehicle may be changed from a motor mode where the traction motor receives electrical power to a generator mode where the traction motor produces electrical power when the trip profile indicates a charging opportunity. The method may further include directing energy generated by the traction motor in generator mode to a first tier of one or more energy storage devices with first rate-of-energy-absorption capabilities. A second tier of one or more energy storage devices with second rate-of-energy-absorption capabilities slower than the first rate-of-energy-absorption capabilities may then be charged with energy from the first tier energy storage devices. The charging of the second tier energy storage devices may continue when the traction motor is no longer producing electrical power.

Abstract: A vehicle having at least an electric traction motor and a passenger cabin includes a controller. The controller has a memory storing an expected range routine and a processor coupled to the memory. The processor is configured to execute the expected range routine. An expected range for the vehicle is determined referencing an average power consumption of a cabin conditioning system over an selected duration of initial cabin conditioning. During the selected duration of initial cabin conditioning, the average power consumption of the cabin conditioning system is added to an instantaneous power consumption of at least the electric traction motor to determine a total power consumption of the vehicle. The total power consumption of the vehicle is used to determine the expected range, which is output on a display located in the passenger cabin for reference by the driver.

Abstract: A motor generator and a power converter are driven by an engine, to supply electric power to a power storage device. ECU causes the engine to start if SOC of the power storage device falls below a first threshold value, and causes the engine to stop if SOC exceeds a second threshold value which is larger than the first threshold value. In the case where a running range has been selected when the vehicle stops, ECU causes the engine to stop if SOC exceeds a third threshold value which is larger than the first threshold value and smaller than the second threshold value. In the case where a non-running range has been selected, ECU causes the engine to stop if SOC exceeds the second threshold value.

Abstract: Methods and systems are provided for displaying a recommended engine fuel fill amount to an operator of a plug-in hybrid electric vehicle. In one example, the recommended engine fuel fill amount is determined based on an actual amount of fuel consumed over a particular duration and displayed to an operator of the vehicle with a low fuel warning.

Abstract: A control device for a hybrid vehicle is configured to enter a driving mode in which a preset engine-start condition is met, and is configured to enter electric vehicle mode when a preset engine-stop condition is met, and includes an engine-start-condition-controlling device which, during travel in the electric vehicle mode, in the event that an electric vehicle travel zone expansion condition that has been set on the basis of vehicle speed VSP and torque demand information reflective of demand by the driver, and that expands the travel zone in the electric vehicle mode, is met, changes the engine-start condition from a baseline start condition, to an expansion engine-start condition for expanding the travel zone in the electric vehicle mode, doing so for the duration of a prescribed time thereafter.

Abstract: An energy map for a motor vehicle and an energy mapping system for making the energy map are disclosed. The energy map includes energy information related to energy consumption and energy recharging of various power sources along various roadway segments. The energy mapping system may include a navigation system for a motor vehicle comprising a GPS receiver, various energy level sensors, and an electronic control unit. A probe vehicle may be used to measure energy consumption and energy recharging for various power sources. The energy mapping system may also include a service provider. The navigation system may measure energy levels for the various power sources along various roadway segments and transmit the measurements to the service provider. The service provider may then associate differences in the measured energy levels for each of the various power sources with the various roadway segments.

Abstract: A vehicle control device is disclosed which calculates a drive torque requirement Treq as a target running force output value for a vehicle on the basis of the amount of driving operation by a driver; calculates a correction torque ?Treq for suppressing vehicle sprung body vibration; controls an engine and an electric motor on the basis of a post-correction drive torque requirement Tareq which is derived by correcting the drive torque requirement Treq with the correction torque ?Treq, and controls the indication of the operation state of the electric motor. The correction torque ?Treq includes at least a feed-back control amount ?Tfb as a disturbance-based correction amount. The indication of the operation state of the electric motor is conducted on the basis of a target running force output value for display in which the influence of the feed-back control amount ?Tfb is reduced as compared with the value Tareq.

Abstract: In a control of a motive power apparatus for a hybrid vehicle, the coil temperatures of first and second rotary electric machines and an air pressure index value are acquired, and upper limit values of the outputs of the machines are determined on the basis of the values acquired. If the output of one of the machines is restricted by the determined upper limit value of the output, the output of the other is increased. Alternatively, the upper limit values of the outputs of rotary electric machines are determined by applying the acquired coil temperatures to a relation between the coil temperature and the upper limit value of the output which relation is set for each air pressure index value. If the output of one of the first and the second rotary electric machines is restrained by the determined upper limit values, the output of the other is increased.

Abstract: A control apparatus for a hybrid vehicle includes, as a drive power source, a hybrid system that has an engine and a motor. The control apparatus includes a control unit configured to reduce an output of the hybrid system and maintain or increase an engine rotation speed when a driver performs an accelerator operation and a brake operation simultaneously.

Abstract: Method for controlling an electrical machine (14), in particular for an electric or hybrid drive train (12) of a motor vehicle (10), wherein the electrical machine (14) can provide a torque (T) both at positive and at negative speeds (n), having the steps of: using a characteristic curve (M; G) to check whether a torque desired value (72; 74) can or may be provided by the electrical machine (14), wherein the characteristic curve (M; G) represents a limit torque with respect to the speed (n) and has a first section (A1; A4) for positive speeds and a second section (A2; A3) for negative speeds. In this case, the first section (A1; A4) and the second section (A2; A3) are arranged in the same quadrant (I; IV) of the characteristic curve (70).

Abstract: A system and method for controlling a driving mode of a hybrid vehicle are provided. The method includes setting, by a controller, an engine-on control level based on an SOC (state of charge) of a battery and calculating a compensation factor based on a speed of the vehicle and a road gradient. The controller is configured to reflect the compensation factor in the engine-on control level and calculate a compensated engine-on control level. In addition, the method includes comparing, by the controller, a driver expectation power to the compensated engine-on control level and starting the engine when the driver expectation power is greater than the compensated engine-on control level.