Back to results
US 12,515,514 B1Granted
Hybrid electric drive system for a vehicle
AssigneeNextgen Tech Initiatives Pvt Ltd
InventorsRohit Arvind Godkar, Mehul Satish Nachane, Sharad Rajaram Godkar
Life of this patent
Estimating the term…
Abstract
A retro-fittable hybrid electric drive system comprises an electric motor and an epicyclic gear system and mode controller, and is configured between IC power pack and an axle to allow different modes of operations, comprising an IC engine mode, an electric mode, a combined mode and a generative mode. The epicyclic gear system and mode controller comprises an epicyclic gear train and levers & pinions to lock or unlock different elements of the epicyclic gear train to achieve the different modes of operations, including two different forward torque-speed ratios during the electric mode.
Claims16
A hybrid electric drive system for a vehicle, said hybrid electric drive system comprising:
- an electric motor;
- and an epicyclic gear system and mode controller;
- wherein the hybrid electric drive system is configured between an output of an IC power pack of the vehicle and an axle of the vehicle;
- wherein the hybrid electric drive system enables three different driving modes, the three driving modes comprising:
- an IC engine mode with drive to the axle from the IC power pack, an electric mode with drive to the axle from the electric motor, and a combined mode with drive to the axle collectively from the IC power pack and the electric motor;
- and wherein the epicyclic gear system and mode controller comprises a first lever and a second lever that move to different positions to enable locking or unlocking of at least one of a planet carrier and a ring gear for enabling two different forward torque-speed ratios, comprising a first torque-speed ratio and a second torque-speed ratio, during the electric mode;
- wherein the epicyclic gear system and mode controller allows output to be taken from a sun gear of an epicyclic gear train of the epicyclic gear system and mode controller, and input to be given to at least one of a planet carrier or a ring gear of the epicyclic gear train;
- wherein the power from both the IC power pack and the electric motor is transmitted to the sun gear such that the sun gear transmits the power to the axle;
- wherein the epicyclic gear system and the mode controller comprises a first pinion gear that locks and unlocks the planet carrier, and a third pinion gear that locks and unlocks the ring gear of the epicyclic gear train;
- wherein the epicyclic gear system and mode controller comprises a first series of pinion gears that transmits power from the electric motor to the planet carrier of the epicyclic gear system and a second series of pinion gears that transmits power from the electric motor to the ring gear of the epicyclic gear system, wherein the first and second levers move to the different positions to enable three different driving modes;
- and
- wherein, for the second torque-speed gear ratio in the electric mode, the first and second levers are moved to a position such that the ring gear of the epicyclic gear train is unlocked, the planet carrier of the epicyclic gear train is locked by the first pinion, and power from the electric motor is transmitted to the ring gear through the second series of pinion gears of the epicyclic gear train.
9 more elements
A hybrid electric drive system for a vehicle, said hybrid electric drive system comprising:
- an electric motor;
- and an epicyclic gear system and mode controller;
- wherein the hybrid electric drive system is configured between an output of an IC power pack of the vehicle and an axle of the vehicle;
- wherein the hybrid electric drive system enables three different driving modes, the three driving modes comprising:
- an IC engine mode with drive to the axle from the IC power pack, an electric mode with drive to the axle from the electric motor, and a combined mode with drive to the axle collectively from the IC power pack and the electric motor;
- and wherein the epicyclic gear system and mode controller comprises a first lever and a second lever that move to different positions to enable locking or unlocking of at least one of a planet carrier and a ring gear for enabling two different forward torque-speed ratios, comprising a first torque-speed ratio and a second torque-speed ratio, during the electric mode;
- wherein the epicyclic gear system and mode controller allows output to be taken from a sun gear of an epicyclic gear train of the epicyclic gear system and mode controller, and input to be given to at least one of planet carrier or a ring gear of the epicyclic gear train;
- wherein the power from both the IC power pack and the electric motor is transmitted to the sun gear such that the sun gear transmits the power to the axle;
- wherein the epicyclic gear system and the mode controller comprises a band brake system comprising of the brake band, a hub connected to the ring gear and a bell crank lever, and wherein a spring-loaded plunger locking arrangement operated by a cable system enables the bell crank lever to move in the desired location to tighten or loosen the band on the hub to lock or unlock the ring gear to enable the different driving modes.
6 more elements
A hybrid electric drive system for a vehicle, said hybrid electric drive system comprising:
- an electric motor;
- and an epicyclic gear system and mode controller;
- wherein the hybrid electric drive system is configured between an output of an IC power pack of the vehicle and an axle of the vehicle;
- wherein the hybrid electric drive system enables three different driving modes, the three driving modes comprising:
- an IC engine mode with drive to the axle from the IC power pack, an electric mode with drive to the axle from the electric motor, and a combined mode with drive to the axle collectively from the IC power pack and the electric motor;
- and wherein the epicyclic gear system and mode controller comprises a first lever and a second lever that move to different positions to enable locking or unlocking of at least one of a planet carrier and a ring gear for enabling two different forward torque-speed ratios, comprising a first torque-speed ratio and a second torque-speed ratio, during the electric mode;
- wherein the epicyclic gear system and mode controller allows output to be taken from a sun gear of an epicyclic gear train of the epicyclic gear system and mode controller, and input to be given to at least one of planet carrier or a ring gear of the epicyclic gear train;
- and
- wherein to enable a power take-off, a PTO lever is moved in a position such that a PTO pinion gear gets engaged with a motor pinion and an idler pinion gear is taken out of mesh, and wherein the electric motor power is then transmitted to a power take-off output shaft with the electric motor, with power not being transmitted to the epicyclic gear system.
6 more elements
Dependencies are inferred from the claim text.