US 6,306,057 B1 · Hybrid drive system

Abstract

A hybrid drive system comprising: a torque amplify mechanism coupled to an output member of an internal combustion engine and an output member of an electric motor, as energized by an electric power to output a torque, for amplifying and outputting the torque, as outputted from the internal combustion engine, by controlling the torque of the electric motor; and a continuously variable transmission arranged between torque amplify mechanism and the output shaft for increasing/decreasing and outputting the torque inputted from the torque amplify mechanism. Further comprised is a forward/backward switching mechanism between the torque amplify mechanism and the output shaft for setting a forward state, in which the inputted motive power is unreversed and outputted, and a backward state in which the inputted motive power is reversed and outputted. As a result, the reverse run can be made only with the motive power outputted from the internal combustion engine.

Claims19

Dependent claims

A hybrid drive system which has:

a torque amplify mechanism (12) coupled to an output member (2) of an internal combustion engine (1) and an output member (9) of an electric motor (6), as energized by an electric power to output a torque, for amplifying and outputting the torque, as outputted from said internal combustion engine (1), by controlling a torque of said electric motor (6);
and a continuously variable transmission (21) arranged between torque amplify mechanism (12) and said output shaft (34) for increasing/decreasing and outputting a motive power inputted from said torque amplify mechanism (12),
characterized by a forward/backward switching mechanism (29) interposed between said torque amplify mechanism (12) and said output shaft (34) for setting a forward state in which the inputted motive power is unreversed and outputted, and a backward state in which the inputted motive power is reversed and outputted.

A hybrid drive system for outputting a motive power from an internal combustion engine (1) and an electric motor (6, 84) to an output member (67, 106) through a planetary gear mechanism (60, 94, 140) including rotary elements of a sun gear (61, 95, 141), a ring gear (62, 98, 142) arranged concentrically with said sun gear (61, 95, 141), and a carrier (65, 96, 144) retaining rotatably and revolvably a plurality of pinion gears (63, 64, 143) arranged between said sun gear (61, 95, 141) and said ring gear (62, 98, 142), characterized by:

brake means (B1, F1) for selectively fixing any one (62, 98, 144) of said three rotary elements that takes a relation, when fixed, in which the other two rotary elements rotate oppositely each other;
first clutch means (C1, C3) for coupling either (61, 65, 95, 96, 141) of said two rotary elements (61, 95, 65, 141, 142) selectively to said output member (67, 106);
and
second clutch means (C2, C4) for coupling said output member (67, 106) selectively to the rotary element (62, 98, 144) which is fixed by said brake means (B1), and characterized:
in that said internal combustion engine (1) is always or selectively coupled to the other (61, 65, 95, 96, 142) of said other two rotary elements (61, 95, 65, 96, 141, 142);
and
in that said electric motor (6, 84) is always or selectively coupled to the rotary element (61, 65, 95, 96, 141) which is coupled to said output member (67, 106) by said first clutch means (C1, C3).

4 more elements

A hybrid drive system for transmitting a motive power outputted from an internal combustion engine (1) and a motive power outputted from an electric motor (6), either individually or synthetically to an output member (67), characterized by:

a first planetary gear mechanism (170) and a second planetary gear mechanism (171) including rotary elements of a sun gear (172, 173), a ring gear (174, 175) arranged concentrically with said sun gear (172, 173), a carrier (176, 177) retaining rotatably and revolvably a pinion gear arranged between said sun gear (172, 173) and said ring gear (174, 175);
brake means (B1) for selectively fixing any one (177) of the rotary elements in said second planetary gear mechanism (171), that take a relation, when fixed, in which the other two rotary elements rotate oppositely each other;
and
second clutch means (C2) for coupling said internal combustion engine (1) selectively to either (173) of said other two rotary elements (173, 175), and characterized:
in that the other rotary element (175) is coupled to said output member (67);
in that any one (176) of the rotary elements of said first planetary gear mechanism (170) that takes a relation, when fixed, in which the other two rotary elements rotate oppositely each other, is coupled to said output member (67);
in that said internal combustion engine (1) is selectively coupled to either (172) of said other two rotary elements (172, 174) in said first planetary gear mechanism (170);
and
in that the motive power of said electric motor (6) is transmitted to the other (174) of said other two rotary elements (172, 174) in said first planetary gear mechanism (170).

6 more elements

Dependencies are inferred from the claim text.

Hybrid drive system

Life of this patent

Hybrid drive system

Life of this patent

Abstract

Claims19