Methods and systems are provided for improving fuel economy and reducing undesired emissions. In one example, a method may include in response to an engine speed being within a first threshold speed of an engine idle speed during a speed reduction request with engine cylinders unfueled, maintaining the cylinders unfueled, and controlling the engine to a desired stopping position responsive to the engine speed being greater than a second threshold speed lower than the idle speed. In this way, fuel usage and emissions may be reduced and engine restart requests may be conducted at least in part via vehicle inertia.

In some examples, a controller determines a target condition of usage of a vehicle, and selects a parameter set from among a plurality of parameter sets based on the determined target condition of usage of the vehicle, the plurality of parameter sets corresponding to different conditions of usage of the vehicle, where each parameter set of the plurality of parameter sets includes one or more parameters that control adjustment of one or more respective adjustable elements of the vehicle. The controller transmits, to the vehicle, the selected parameter set to control a setting of the one or more adjustable elements of the vehicle.

Methods and systems are provided for improving fuel economy and reducing undesired emissions. In one example, a method may include in response to an engine speed being within a first threshold speed of an engine idle speed during a speed reduction request with engine cylinders unfueled, maintaining the cylinders unfueled, and controlling the engine to a desired stopping position responsive to the engine speed being greater than a second threshold speed lower than the idle speed. In this way, fuel usage and emissions may be reduced and engine restart requests may be conducted at least in part via vehicle inertia.

A system and method for retrofit engine start/stop control system for an air starter equipped internal combustion engine includes a circuit to energize and air control value, an air pressure sensor, a programmable logic controller, an engine block temperature sensor to measure an external engine temperature, an ambient temperature sensor, an ignition circuit connector, a battery voltage sensor, and an engine speed sensor. The programmable logic controller is configured to start the engine when at least one of the pressure of the compressed gas tank, an external engine block temperature, an ambient air temperature, and a battery output voltage fall below a predefined threshold value for startup.

Methods, systems, and non-transitory computer-readable media are configured to perform operations comprising: determining whether a first type of condition associated with an input is satisfied; based at least in part on satisfaction of the first type of condition, generating an estimated value of a parameter associated with operation of a vehicle; and controlling the vehicle based at least in part on the estimated value of the parameter.

Methods and systems are provided for controlling a distribution between engine and motor torques for a hybrid electric vehicle operating in a creep mode of operation in response to an engine start request. In one example, responsive to a request to start an engine while a vehicle is being propelled at a predetermined wheel creep torque via an electric motor positioned downstream of a transmission and a torque converter, coordinating an electric motor torque and an engine torque in one of a first mode, second mode, or a third mode depending on whether the electric motor can continue to provide the predetermined wheel creep torque. In this way, engine idle speed may be minimized depending on vehicle operating conditions, which may improve fuel economy.

A vehicle comprises an intelligent speed adaptor (ISA) system. The ISA system is configurable to limit the allowed speed of the vehicle to a speed determined based at least in part on a currently allowed speed for a speed zone applicable to a current location of the vehicle; and to limit the allowed speed of the vehicle to a nominal speed. The nominal speed results in the effective disengagement and nonoperation of the accelerator of the vehicle. The nominal speed may be 1 kilometer per hour, 1 mile per hour. The nominal speed also may correspond to a speed that results from idling of the engine.

The purpose of the present invention is to provide a parking assist device for a vehicle such that the vehicle can be parked without decreasing or excessively increasing the speed or causing the vehicle to stop during assisted parking, the speed of the host vehicle is kept constant even immediately after an obstacle or a bump is cleared, and the vehicle is prevented from colliding with any other parked vehicle. The device calculates a speed command value and/or an engine torque command value in consideration of the acceleration/deceleration of the vehicle and controls the speed of the vehicle on the basis of the calculated speed command value and/or the engine torque command value, said acceleration/deceleration being predicted in advance on the basis of the height and distance of an obstacle and/or a bump that is present in a parking path, the gradient of the road surface, and the steering angle.

A coasting driving control method and system for a vehicle may determine virtual engine RPM for a current driving state using engine RPM, vehicle speed, and gear stage information by a controller when coasting is started with the clutch in the neutral position and outputs a downshifting instruction signal for a gear stage by the controller when the virtual engine RPM is less than a coasting engine RPM which is greater than an idling RPM by a predetermined value.

A brake system includes an accumulator accumulating hydraulic oil discharged from a hydraulic pump, a hydraulic oil cooler cooling the hydraulic oil discharged from the hydraulic pump, a switch valve switching between a first oil channel that allows supplying the hydraulic oil from the hydraulic pump to the accumulator but not to the hydraulic oil cooler, and a second oil channel that allows supplying the hydraulic oil from the hydraulic pump to the hydraulic oil cooler, and a controller controlling an engine to increase an engine speed of the engine when a first detector detects timing to switch the switch valve from the second oil channel to the first oil channel and a second detector detects that the engine is running at idle.