Hybrid vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroyuki Azuma, Tatsuki Saitoh
Life of this patent
Estimating the term…
Abstract
In a hybrid vehicle configured such that a sun gear, a carrier and a ring gear of a planetary gear are respectively connected with a rotating shaft of a motor MG1, a crankshaft of an engine and a driveshaft and that a motor MG2 is connected with the driveshaft, when a required braking force that is to be output to the driveshaft is equal to or less than a reference value Tref in an accelerator-off state, the braking force by engine braking is output to the driveshaft by motoring of the engine by the motor MG1. When the required braking force becomes greater than the reference value Tref, on the other hand, the power output from the engine by load operation of the engine in a reverse rotating direction is output as the braking force to the driveshaft.
Claims3
A hybrid vehicle, comprising an engine;
- a first motor;
- a single pinion-type planetary gear mechanism configured to include a sun gear connected with a rotating shaft of the first motor, a carrier connected with an output shaft of the engine, and a ring gear connected with a driveshaft that is linked with an axle;
- a second motor configured to cause power to be input from and output to the driveshaft;
- and a battery configured to transmit electric power to and from the first motor and the second motor, wherein torque is output from the engine to the carrier both in a normal rotating direction and in a reverse rotating direction, the hybrid vehicle further comprising:
- a braking controller configured to perform braking control when a required braking force that is to be output to the driveshaft is greater than a predetermined braking force, wherein the braking control controls the engine and the first motor to apply a torque in the reverse rotating direction from the engine to the carrier and thereby reversely rotate the carrier with applying a torque in the normal rotating direction from the first motor to the sun gear, such as to cause a braking force to be output to the driveshaft, while controlling the second motor such as to cause the required braking force to be output to the driveshaft.
Dependencies are inferred from the claim text.