A method for operating a vehicle includes determining a transmission input speed, operating the transmission using the transmission input speed, and providing a braking torque request to cause braking of the vehicle according to a scheme selected from the group consisting of a first braking mode and a second braking mode. The transmission input speed and the transmission operating range state are dependent on said braking torque request in the first braking mode, and wherein the transmission operating state, but not the transmission input speed, is dependent on the braking torque request in the second braking mode.

Optimal selection of hybrid range state and/or input speed with a blended braking system in a hybrid electric vehicle

A survey of powertrain configuration studies on hybrid electric vehicles

A control device for a hybrid vehicle includes an actual intake gas negative pressure detection unit which detects an intake air negative pressure for the engine, an estimated intake gas negative pressure calculation unit which estimates an intake air negative pressure based on a revolution number of the engine and an opening degree of a throttle, and an engine control unit which compares an actual intake gas negative pressure obtained by the actual intake gas negative pressure detection unit with an estimated intake gas negative pressure obtained by the estimated intake gas negative pressure calculation unit. The engine control unit prohibits a fuel supply to the engine until the actual intake gas negative pressure matches the estimated intake gas negative pressure, and carries out the fuel supply to the engine when the actual intake gas negative pressure matches the estimated intake gas negative pressure.

Control device for hybrid vehicle

A drive control device for a hybrid vehicle is provided with a differential device including four rotary elements; and an engine, first and second electric motors and an output rotary member which are respectively connected to the four rotary elements. One of the four rotary elements is constituted by a rotary component of a first differential mechanism and a rotary component of a second differential mechanism selectively connected through a clutch, and one of the rotary components is selectively fixed to a stationary member through a brake. The hybrid vehicle is selectively placed in a plurality of drive modes according to respective combinations of engaged and released states of the clutch and the brake. The drive control device comprises: a substitutive drive control portion configured to alternately implement a vehicle driving control and a battery charging control in the event of a failure of one of the first and second electric motors, the vehicle driving control being implemented to operate the other of the first and second electric motors, for generating a vehicle drive force, and the battery charging control being implemented to charge a vehicle driving battery with the other electric motor.

Drive control device for hybrid vehicle

A driving/braking force manipulation control input of a k-th wheel, which denotes one or more specific wheels among a plurality of wheels of a vehicle, is determined such that a required condition concerning a relationship among a road surface reaction force that may act from a road surface on the k-th wheel on the basis of the detected values or estimated values of a side slip angle and a friction characteristic of the k-th wheel, a feedback control input related to the driving/braking force of the k-th wheel for bringing a difference between a state amount of the vehicle and a reference state amount close to zero, a driving/braking force feedforward control input based on a drive manipulated variable supplied by a driver of the vehicle, and a k-th wheel driving/braking force manipulation control input is satisfied. This arrangement makes it possible to properly control a motion of an actual vehicle to a desired motion while properly considering the characteristics of a road surface reaction force acting from a road surface on a wheel.

Vehicle Control Device

In a hybrid automobile (20), if an ECO switch (88) is turned off when an engine is started, the engine (22) and motors (MG1, MG2) are controlled so as to suppress vibration resulting from torque pulsation occurring in a crankshaft (26) due to damping torque (Tv) from the motor (MG1) and to output a demand torque (Tr*) to a ring gear shaft (32a) (S140-S250). If the ECO switch (88) is turned on when the engine is started, the engine (22) and the motors (MG1, MG2) are controlled so as to output the demand torque (Tr*) to the ring gear shaft (32a) with the damping torque (Tv) from the motor (MG1) set to value 0 (S150-S250).

Vehicle and its control method

In a hybrid vehicle 20 , when the ECO switch 88 is turned on, a maximum allowable charging power Pcmax is set based on a vehicle speed and an ECO mode maximum allowable charging power setting map that is a second relationship having a tendency to allow charging of a battery 50 in comparison with a normal maximum allowable charging power setting map (Step S 130 ), and an engine 22 , motors MG 1 and MG 2 are controlled so that the battery 50 is charged with an effective charge-discharge power demand Pb* as a charging power demand set at Step S 140 in accordance with state of the battery 50 within a range of the maximum allowable charging power Pcmax and a torque demand Tr* for driving is ensured (Steps S 150 -S 280 ).

Vehicle and control method thereof

Development of new hybrid system for compact class vehicles

When determined that a driver's accelerator operation is rough during the turn-on condition of an ECO switch 88 while a hybrid vehicle 20 is driven without an operation of an engine 22 (Step S 120 ), a threshold value Pref with respect to a power demand P* is set to a value P 2 that is larger than a value P 1 of the turn-off condition of the ECO switch 88 so as to give priority to fuel consumption of the engine 22 (Step S 140 ) Then, the engine 22 , motors MG 1 and MG 2 are controlled with a start of the engine 22 as necessary so as to ensure torque equivalent to a torque demand Tr* (Steps S 150 -S 230 )

Hybrid vehicle and control method thereof

An ECU executes a program including: steps (S100, S110) of detecting an SOC and a temperature TB of a traction battery; when an EV switch is on (YES in S120), a step (S130) of calculating a temperature correction coefficient α (1) from TB; when EV switch not on (NO in S120), a step (S150) of calculating a temperature correction coefficient α (2) from TB; steps (S140, S160) of calculating an EV traveling allowed power value WOUT based on the SOC and the temperature correction coefficients; and a step (S170) of transmitting EV traveling allowed power value WOUT to a meter ECU in order to indicate EV traveling allowed power value WOUT on a power meter.

Kunihiko Jinno

Papers

Vehicle and its control method

Vehicle and control method thereof

Development of new hybrid system for compact class vehicles

Hybrid vehicle and control method thereof

Display device for hybrid vehicle