Systems and methods for operating an internal combustion engine that is coupled to a power split transmission are described. In one example, the internal combustion engine is operated in a speed control mode or a torque control mode in response to a braking torque and a transmission shift command. Operating the engine in the torque control mode may allow the engine to charge a battery while a neutral transmission state is selected.

An embodiment control device for discharging condensed water includes a signal receiver configured to receive a power-starting off signal, a temperature receiver configured to receive outdoor air temperature information, and a controller configured to perform a condensed water discharge mode maintaining an engine under an idling condition during a preset power-starting maintenance period in response to the power-starting off signal being received by the signal receiver and the outdoor air temperature information received from the temperature receiver being equal to or lower than a set temperature value.

A utility vehicle includes: an engine; a drive wheel; a power transmission path between the engine and the drive wheel; a clutch that is provided in the power transmission path and configured to disconnect power transmission when an engine rotational speed is lower than an engage rotational speed; an engine rotational speed sensor configured to sense the engine rotational speed; and a controller configured to control an operation of the engine, the controller including an engine brake necessity determination circuitry configured to determine necessity of engine braking, and an engine rotational speed control circuitry configured to control the engine rotational speed, and when the engine brake necessity determination circuitry determines that engine braking is necessary, the engine rotational speed control circuitry is configured to perform automatic engine brake control that increases the engine rotational speed so as to be equal to or higher than the engage rotational speed.

Systems and methods for transitioning a hybrid vehicle from park or neutral to drive or reverse are presented. In one example, a requested engine speed is adjusted in response to a transmission disengaging indication and a transmission disengaging timer when a transmission is being disengaged from a gear. In another example, the requested engine speed is adjusted in response to a transmission engaging indication and a transmission engaging timer when the transmission is being engaged to a gear.

A utility vehicle includes: an engine; a drive wheel; a power transmission path between the engine and the drive wheel; a clutch that is provided in the power transmission path and configured to disconnect power transmission when an engine rotational speed is lower than an engage rotational speed; an engine rotational speed sensor configured to sense the engine rotational speed; and a controller configured to control an operation of the engine, the controller including an engine brake necessity determination circuitry configured to determine necessity of engine braking, and an engine rotational speed control circuitry configured to control the engine rotational speed, and when the engine brake necessity determination circuitry determines that engine braking is necessary, the engine rotational speed control circuitry is configured to perform automatic engine brake control that increases the engine rotational speed so as to be equal to or higher than the engage rotational speed.

An engine system is provided, which includes a supercharger driven by a crankshaft of an engine, an electromagnetic clutch disconnectably connecting the crankshaft to the supercharger, and a controller configured to output a control signal to the electromagnetic clutch. The controller includes a processor configured to execute an uphill-angle detecting module to detect an uphill angle during traveling of a vehicle, an uphill determining module to determine whether the detected uphill angle is above a given first uphill angle, and a boost controlling module to, when the detected uphill angle is above the first uphill angle, control the electromagnetic clutch to connect the crankshaft to the supercharger even when a target torque of the engine is within a not-boosting range.

Methods and systems are provided for an engine. In one example, a method of operating an engine of a vehicle, the vehicle comprising a brake pedal, a clutch pedal and a transmission having a neutral position and at least one in-gear position, comprises starting the engine if either the brake pedal of the vehicle is released or the transmission has been in neutral for a predetermined period of time, and the clutch pedal of the vehicle is depressed concurrently with the transmission being moved out of the neutral position into an in-gear position.

A vehicle control system includes an accelerator sensor which detects an accelerator opening, and a processor which sets a target acceleration of a vehicle based on the detected accelerator opening, sets a target torque of a drive source based on the set target acceleration, and controls the drive source to generate the set target torque. In a case where the target acceleration at a time when the accelerator opening is increased is set as a depression-increasing target acceleration and the target acceleration at a time when the accelerator opening is decreased is set as a pedal-returning target acceleration, under the same condition of the accelerator opening, the processor sets the target acceleration such that the depression-increasing target acceleration and the pedal-returning target acceleration are different from each other in a predetermined range of an upper limit acceleration or less and a lower limit acceleration or greater.

A vehicle speed control system that controls a vehicle speed of an agricultural vehicle that performs work using a work device while traveling using a traveling device, the agricultural vehicle performs work travel a plurality of times with non-work travel interposed therebetween, the vehicle speed control system including: a control unit configured to perform work travel control in which a vehicle speed is set according to a load on a motive power source that drives the traveling device and the work device; and a storage unit in which a vehicle speed that is set during the work travel is stored as an optimum vehicle speed, the control unit performs initial work travel control in which a vehicle speed at a time when the work travel is started after the non-work travel is set using the optimum vehicle speed that is stored during the work travel performed before the non-work travel.

A smart driveline disconnect assembly having a torque coupling assembly, an actuator, at least one sensor and a controller is provided. The torque coupling assembly is configured to selectively couple torque between a transmission and a final drive assembly. The actuator is configured to activate the torque coupling assembly. The at least one sensor is used to generate sensor information. The controller is configured to control the actuator based at least in part on the sensor information. The controller is further configured to determine at least a thermal energy level associated with the torque coupling assembly based on the sensor information and at least in part control the actuator based on the determined estimated thermal energy level.