Hybrid drive system wherein electric motor or engine is selectively used for rearward driving of vehicle
First Claim
1. A hybrid drive system for a motor vehicle having a drive wheel, comprising:
- an engine operated by combustion of a fuel;
an electric energy storage device for storing an electric energy;
an electric motor operated with the electric energy stored in said electric energy storage device;
a power transmission device having at least one forward-drive position for driving said motor vehicle in a forward direction and at least one rear-drive position for driving said motor vehicle in a rearward direction, and disposed in a power transmission path between said drive wheel and a drive power source consisting of said engine and said electric motor;
manually operated selecting means for selecting said at least one rear-drive position of said power transmission device;
rear-drive shifting means for placing said power transmission device in one of said at least one rear-drive position when said manually operated selecting means is operated to a reverse position for selecting said at least one rear-drive position;
energy determining means for determining whether an amount of the electric energy stored in said electric energy storage device is smaller than a predetermined lower limit; and
rear-drive mode control means, operable when said manually operated selecting means is operated to said reverse position, for operating said electric motor to drive said motor vehicle in said rearward direction if the amount of said electric energy stored in said electric energy storage device is not smaller than said lower limit, and for operating said engine to drive said motor vehicle in said rearward direction if the amount of said electric energy stored in said storage device is smaller than said lower limit.
1 Assignment
0 Petitions
Accused Products
Abstract
A hybrid vehicle drive system including an engine, an electric motor operated by an electric energy stored in a storage device, a power transmission having a rear-drive position, a shift lever for selecting the rear-drive position, a rear-drive shifting device for placing the power transmission in the rear-drive position when the shift lever is operated to a reverse position for selecting the rear-drive position, and a rear-drive mode control device which is operated when the shift lever is operated to the reverse position, for operating the electric motor to drive the vehicle in the rearward direction when the amount of the electric energy stored in the storage device is not smaller than a predetermined lower limit, and for operating the engine to drive the vehicle in the rearward direction when the stored electric energy amount is smaller than the lower limit.
-
Citations
14 Claims
-
1. A hybrid drive system for a motor vehicle having a drive wheel, comprising:
-
an engine operated by combustion of a fuel; an electric energy storage device for storing an electric energy; an electric motor operated with the electric energy stored in said electric energy storage device; a power transmission device having at least one forward-drive position for driving said motor vehicle in a forward direction and at least one rear-drive position for driving said motor vehicle in a rearward direction, and disposed in a power transmission path between said drive wheel and a drive power source consisting of said engine and said electric motor; manually operated selecting means for selecting said at least one rear-drive position of said power transmission device; rear-drive shifting means for placing said power transmission device in one of said at least one rear-drive position when said manually operated selecting means is operated to a reverse position for selecting said at least one rear-drive position; energy determining means for determining whether an amount of the electric energy stored in said electric energy storage device is smaller than a predetermined lower limit; and rear-drive mode control means, operable when said manually operated selecting means is operated to said reverse position, for operating said electric motor to drive said motor vehicle in said rearward direction if the amount of said electric energy stored in said electric energy storage device is not smaller than said lower limit, and for operating said engine to drive said motor vehicle in said rearward direction if the amount of said electric energy stored in said storage device is smaller than said lower limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A hybrid drive system for a motor vehicle, comprising:
-
an engine operated by combustion of a fuel; an electric energy storage device for storing an electric energy; an electric motor operated with the electric energy stored in said electric energy storage device; a power transmission device having at least one forward-drive position for driving said motor vehicle in a forward direction and at least one rear-drive position for driving said motor vehicle in a rearward direction, and disposed in a power transmission path between said drive wheel and a drive power source consisting of said engine and said electric motor; manually operated selecting means for selecting said at least one rear-drive position of said power transmission device; rear-drive shifting means for placing said power transmission device in one of said at least one rear-drive position when said manually operated selecting means is operated to a reverse position for selecting said at least one rear-drive position; and rear-drive mode control means, operable when said manually operated selecting means is operated to said reverse position, for selectively operating said motor and said engine, depending upon a running condition of said motor vehicle. - View Dependent Claims (12, 13, 14)
-
Specification