Abstract:
A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode (YES in S100), a step (S102) of reducing an engine torque, a step (S104) of releasing a clutch (C1), a step (S106) of reducing a reaction torque of a first rotary electric machine (first MG) and a step (S108) of increasing a torque of a second rotary electric machine (second MG), and, when synchronization is started (YES in S 110) and a step (S112) of increasing a positive torque of the first MG, a step (S114) of starting engagement of a clutch (CS), and, when a rotation speed of the first rotary electric machine (first MG) and a rotation speed of an engine are synchronous with each other (YES in S116), a step (S118) of engaging the clutch (CS).
Abstract:
A driving force control system for improving energy efficiency under a motor-drive mode. The control system selects the motor-drive mode from a single motor-mode where a vehicle is powered by any one of the rotary devices, and a dual motor-mode where the vehicle is powered by both rotary devices. The driving force control system is configured to select the single-motor mode rather than the dual-motor mode, provided that an increment of an energy consumption to establish the dual-motor mode is larger than a decrement of the energy consumption to be achieved by the dual-moor mode, under a driving condition where a required driving force can be achieved by either the single-motor mode or the dual-motor mode.
Abstract:
Power from an engine of a hybrid vehicle is input to an input shaft (302) of a power split device. A one-way clutch (500) and the power split device are housed in a housing (600). A cover member (700) is provided inside the housing (600). The one-way clutch (500) includes an outer race (510), an inner race (520), and a sprag (530). The outer race (510) is spline-engaged to a protruding portion (701) of the cover member (700). The inner race (520) is spline-engaged to the input shaft (302), and is rotatably supported by the protruding portion (702) of the cover member (700) via a bushing (522). The input shaft (302) is rotatably supported by the cover member (700) via a first bearing (340), a rotating member (322A), and a second bearing (350).
Abstract:
A transmission unit (40) is able to switch between a non-neutral state where power of an engine (10) is transmitted via a path (K1) and a neutral state where power of the engine is not transmitted via the path (K1). A clutch (CS) is able to switch between an engaged state where power is transmitted from the engine (10) to a first MG (20) and a released state where transmission of power from the engine (10) to the first MG (20) is interrupted. When the transmission unit (40) is controlled to the non-neutral state and, at the same time, the clutch (CS) is set to the released state, a vehicle is operable in series-parallel mode. When power is transmitted via the path (K2) by directly coupling the engine (10) to the first MG (20) by the clutch (CS) and the path (K1) is interrupted by controlling the transmission unit (40) to the neutral state, the vehicle is operable in series mode. Selected Drawing: FIG. 5
Abstract:
In a power transmitting apparatus (TM) for a hybrid vehicle, including a power split mechanism (4) that splits or combines dynamic power and transmits the power between an engine (1) and a drive shaft (5), and a transmission gear mechanism (17) that changes a rotational speed of the engine (1) through engagement and release of a clutch (C1) and a brake (B1) using hydraulic actuator s (103, 106), the transmission gear mechanism (17) is formed as a transmission gear unit covered with a front cover (108) and a rotary machine cover (118), and the transmission gear unit is mounted to a housing (122) in which the power split mechanism (4) and a motor-generator (2) are disposed, while oil passages (116, 117) for shift control used for supplying hydraulic pressure to the hydraulic actuators (103, 106) are formed in the front cover (108) or the rotary machine cover (118).
Abstract:
A vehicle (100) includes an engine (130), a drive-train (200) including a rotary electric machine (210, 220) that operates as a drive source, a heat-exchange device (160) configured to effect heat exchange between a lubricant used in the drive-train (200) and a cooling medium used in the engine (130), and a control device (300) configured to activate the heat-exchange device (160) so as to warm up the engine (130) when the engine (130) is expected to be started while the vehicle (100) is running using driving force from the rotary electric machine (210, 220).
Abstract:
A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode (YES in S1OO), a step (S102) of reducing an engine torque, a step (S104) of releasing a clutch (C1), a step (S106) of reducing a reaction torque of a first rotary electric machine (first MG) and a step (S108) of increasing a torque of a second rotary electric machine (second MG), and, when synchronization is started (YES in S110) and a step (S112) of increasing a positive torque of the first MG, a step (S 114) of starting engagement of a clutch (CS), and, when a rotation speed of the first rotary electric machine (first MG) and a rotation speed of an engine are synchronous with each other (YES in S116), a step (S118) of engaging the clutch (CS).
Abstract:
A hybrid vehicle (1) includes a transmission unit (40) and a clutch (CS). The transmission unit (40) is configured to be able to switch into a neutral state. The hybrid vehicle (1) is able to transmit power of an engine (10) through any one of a first path through which power is transmitted to a first MG (20) from the engine (10) via the transmission unit (40) and a differential unit (50) and another second path through which power is transmitted from the engine (10). The clutch (CS) is provided in the second path. The clutch (CS) switches between an engaged state where power is transmitted and a released state where transmission of power is interrupted. The controller (100) sets the transmission unit (40) to the neutral state and sets the clutch (CS) to the engaged state, and then starts the engine (10) by increasing the rotation speed of the engine (10) with the use of the first MG. (20).
Abstract:
A vehicle control system for reducing shocks resulting from restarting an engine under EV running mode. The vehicle control system is applied to a vehicle comprising an engagement device that selectively connect the engine with the powertrain, and a motor adapted to generate a drive force and connected with the powertrain. In the vehicle, a first mode is selected to propel the vehicle by the motor while interrupting the torque transmission between the engine and the powertrain and stopping the engine, and a second mode is selected to propel the vehicle by the motor while allowing the torque transmission between the engine and the powertrain and stopping the engine. The vehicle control system selects the second mode if a control response of at least any of the engagement device and the motor is estimated to be out of a predetermine range when the vehicle is running while stopping the engine (step S4).
Abstract:
A hybrid system includes an engine (ENG), a first rotary machine (MG1), a speed change device (20) to which the engine (ENG) is connected, a differential gear (30) to which the speed change device (20) and the first rotary machine (MGI) are connected, a clutch (CLl) and a brake (BKl) causing the speed change device (20) to change gears by engagement and disengagement between first plates (83, 93) and second plates (84, 94), a casing (60) configured to house therein these members except the engine (ENG) and to be connected to the engine (ENG), and a cover wall (71) configured to cover an opening of the casing (60) which opening is provided on an engine (ENG) side. The first rotary machine (MGI) is placed on the engine (ENG) side relative to the clutch (CLl) and the brake (BKl), the clutch (CLl) is placed inside a cylinder member (91) of the brake (BKl), and the cylinder member (91) is connected to a cover wall (71).