HYBRID TRANSMISSION SYSTEM

OUTLINE

1. The L110 hybrid transmission (hybrid vehicle transmission assembly) is used on models with 2GR-FXE engine. This hybrid transmission has been made compact and lightweight through the use of a 2-stage motor speed reduction planetary gear. Furthermore, the transmission has achieved environmental performance including fuel economy, while power performance has been achieved as well.

2. Containing a Motor Generator 2 (MG2) for driving the vehicle and generating electrical power, and a Motor Generator 1 (MG1) for generating electrical power and starting the engine, this transmission uses a continuously variable transmission mechanism with a compound gear unit that achieves smooth and quiet operation.

3. The 2-stage motor speed reduction planetary gear is a hydraulically controlled mechanism that automatically switches the reduction ratio of the MG2 motor speed between the low-speed range and high-speed range. This enables the vehicle to achieve smooth acceleration performance from the start-off to the maximum speed range.

4. This transmission uses 2 oil pumps. One is a mechanical oil pump that is driven by the engine. The other is an electrical oil pump that supplies hydraulic pressure when the engine is stopped. These pumps ensure a reliable supply of hydraulic pressure.

5. A transmission damper that consists of a coil spring with low-twist characteristics is used in order to absorb the torque fluctuation in the motive force of the engine.

6. A sequential shiftmatic system is used, thus enabling a shift range selection operation that feels like a manual transmission vehicle using the shift lever and shift paddle. In addition, even when driving with the shift lever in D, the shift paddle operation (shift range selection operation using the shift paddle) has been made available.

SPECIFICATION