A human-powered vehicle control device controls the transmission that changes the transmission ratio of a human-powered vehicle. The control device includes an electronic controller that switches between a first control state for controlling the transmission to change the transmission ratio in accordance with a first prescribed set of conditions, and a second control state for controlling the transmission to suppress the change of the transmission ratio as compared with if the electronic controller is in the first control state, in accordance with at least one of the motion state of the body of the human-powered vehicle, the steering state of the human-powered vehicle, the surface conditions of a travel path on which the human-powered vehicle travels, and a pedaling preparation state related to the pedals of the human-powered vehicle.

A road information acquisition unit (12a) acquires information about the road in a prescribed segment in front, a vehicle information acquisition unit (12b) acquires information about the vehicle (1), a velocity prediction unit (12c) predicts, on the basis of the road information and the information about the vehicle (1), the changes in the vehicle velocity that would be brought about in the prescribed segment in the case of travelling the prescribed segment in a first gear, and a shift control unit (12d) which maintains the first gear if the condition is satisfied that the predicted vehicle velocity exhibits a minimum value other than at the ends of the prescribed segment and the minimum value is greater than the delay speed, which is set to a value less than a predetermined velocity set as the velocity that would result from downshifting.

A transmission control system of a vehicle includes an estimated acceleration module and a pressure control module. The estimated acceleration module determines an estimated longitudinal acceleration of the vehicle based on a force at axles of the vehicle corresponding to engine torque, a braking force imposed by mechanical brakes of the vehicle, an aerodynamic drag force of the vehicle, and a road load force imposed on the vehicle by contact between tires of the vehicle and a road surface. The pressure control module, when a measured longitudinal acceleration of the vehicle is negative and the estimated longitudinal acceleration is greater than the measured longitudinal acceleration of the vehicle, adjusts transmission fluid pressure applied to one or more clutches of the transmission and shifts the transmission to neutral.

The present disclosure relates to a shift control apparatus for a vehicle, and more particularly, to a shift control apparatus and method for a vehicle that can control gear shifts by detecting a slope ahead based on road information. A shift control apparatus for a vehicle may include: an engine; a transmission configured to receive power from the engine; and a controller configured to check an effective sloping point based on road information, to calculate a target gear ratio based on a first engine torque at a location of the vehicle and a gear ratio of the transmission when the effective sloping point is reached within a predetermined amount of time, to set a target gear position based on the target gear ratio, and to control the transmission based on the target gear position.

A human-powered vehicle control device controls the transmission that changes the transmission ratio of a human-powered vehicle. The control device includes an electronic controller that switches between a first control state for controlling the transmission to change the transmission ratio in accordance with a first prescribed set of conditions, and a second control state for controlling the transmission to suppress the change of the transmission ratio as compared with if the electronic controller is in the first control state, in accordance with at least one of a steering state of the human-powered vehicle, a surface condition of a travel path on which the human-powered vehicle travels, and a pedaling preparation state related to the pedals of the human-powered vehicle.

In the present invention: a road information acquisition unit (12a) acquires road information about a prescribed section of road ahead of a vehicle traveling at a first shift position; a vehicle information acquisition unit (12b) acquires vehicle information; a speed prediction unit (12c) predicts, on the basis of the road information and the vehicle information, the speed transition in the prescribed section for when the vehicle will have traveled through the prescribed section at the first shift position; and a gearshift control unit (12d) causes a transmission (5) to downshift to a second shift position when the minimum value of the predicted vehicle speed is less than a prescribed speed.

A road information acquisition unit (12a) acquires information about the road in a prescribed segment in front, a vehicle information acquisition unit (12b) acquires information about the vehicle (1), a velocity prediction unit (12c) predicts, on the basis of the road information and the information about the vehicle (1), the changes in the vehicle velocity that would be brought about in the prescribed segment in the case of travelling the prescribed segment in a first gear, and a shift control unit (12d) which maintains the first gear if the condition is satisfied that the predicted vehicle velocity exhibits a minimum value other than at the ends of the prescribed segment and the minimum value is greater than the delay speed, which is set to a value less than a predetermined velocity set as the velocity that would result from downshifting.

A method and a system for choosing a transmission mode in a vehicle over the course of a road section, wherein the vehicle has applied coasting prior to this road section and wherein a highest permitted speed v.sub.max is defined for the road section, below which an actual speed for the vehicle should be kept. A simulation of a future speed profile v.sub.sim.sub._.sub.Gear for a possible gear position for a gearbox in the vehicle is conducted on the basis of a road slope obtained from map data in combination with vehicle positioning information and wherein the simulation simulates, when the road section lies ahead of the vehicle, an actual speed for the vehicle over the course of the road section. Next, an evaluation is carried out of whether a suspension of the coasting in favor of the possible gear position is recommended, wherein the possible gear position is deemed recommendable if a highest value v.sub.sim.sub._.sub.Gear.sub._.sub.max for the future speed profile exceeds the highest permitted speed v.sub.max. The evaluation is then utilized in the choice of transmission mode.

A transmission control system of a vehicle includes an estimated acceleration module and a pressure control module. The estimated acceleration module determines an estimated longitudinal acceleration of the vehicle based on a force at axles of the vehicle corresponding to engine torque, a braking force imposed by mechanical brakes of the vehicle, an aerodynamic drag force of the vehicle, and a road load force imposed on the vehicle by contact between tires of the vehicle and a road surface. The pressure control module, when a measured longitudinal acceleration of the vehicle is negative and the estimated longitudinal acceleration is greater than the measured longitudinal acceleration of the vehicle, adjusts transmission fluid pressure applied to one or more clutches of the transmission and shifts the transmission to neutral.

A control apparatus is mountable to a vehicle including an electric motor, a lock mechanism, and an actuator apparatus. The control apparatus controls the electric motor and a shift-by-wire system provided in the vehicle. The shift-by-wire system performs switching to shift ranges of the vehicle including a shift range and a non-parking range other than the parking range. The control apparatus drives the actuator apparatus to release the lock on the power transmission mechanism by the lock mechanism based on the shift range of the shift-by-wire system being switched from the parking range to the non-parking range. The control apparatus performs torque correction control in which an output torque of the electric motor is corrected such that a load acting on the lock mechanism from the power transmission mechanism is reduced based on the shift range of the shift-by-wire system being switched from the parking range to the non-parking range.