초록 ▼

A hybrid powertrain for a vehicle comprising a diesel engine and an electric motor in a parallel arrangement with a multiple ratio transmission located on the torque output side of the diesel engine, final drive gearing connecting drivably the output shaft of transmission to traction wheels of the v

A hybrid powertrain for a vehicle comprising a diesel engine and an electric motor in a parallel arrangement with a multiple ratio transmission located on the torque output side of the diesel engine, final drive gearing connecting drivably the output shaft of transmission to traction wheels of the vehicle, and an electric motor drivably coupled to the final drive gearing. A powertrain controller schedules fuel delivered to the diesel engine and effects a split of the total power available, a portion of the power being delivered by the diesel and the balance of the power being delivered by the motor. A shifting schedule for the multiple ratio transmission makes it possible for establishing a proportional relationship between accelerator pedal movement and torque desired at the wheels. The control strategy for the powertrain maintains drivability of the vehicle that resembles drivability of a conventional spark ignition vehicle engine powertrain while achieving improved fuel efficiency and low exhaust gas emissions.

대표청구항 ▼

[ What is claimed is:] [1.] A hybrid powertrain for an automotive vehicle comprising a diesel engine, a multiple ratio transmission and an electric motor, said transmission having a torque input side connected to said diesel engine and a torque output side connection to said electric motor;said dies

[ What is claimed is:] [1.] A hybrid powertrain for an automotive vehicle comprising a diesel engine, a multiple ratio transmission and an electric motor, said transmission having a torque input side connected to said diesel engine and a torque output side connection to said electric motor;said diesel engine having an accelerator pedal and a fuel scheduling means for regulating fuel delivery in response to accelerator pedal movement:an electronic controller including memory registers, said memory registers having stored therein a first functional relationship of power desired and accelerator pedal movement, a second functional relationship between diesel engine speed and rate of fuel delivery by said fuel scheduling means for each of a family of accelerator positions and a third functional relationship between electric motor speed and electric motor current:said controller including output driver circuit means connected to said diesel engine fuel scheduling means and said electric motor and being responsive to said accelerator pedal movement and feedback speed information from said diesel engine, said fuel scheduling means and said electric motor to effect an overall diesel engine power and diesel engine speed relationship for each accelerator pedal position that is characterized by best specific fuel consumption: andfinal drive gearing having torque output shafts connected to vehicle traction wheels and two final drive input shafts, one final drive torque input shaft being connected to torque output portions of said transmission and the other final drive torque input shaft being connected to said electric motor.