Split serial-parallel hybrid dual-power drive system

A split series-parallel hybrid dual-power drive system operable alternatively as a series power drive system or a parallel power drive system, comprising:

• a first drive system for driving a first load, the first drive system including an engine and a first dynamo-electric unit, the engine having a rotary part coupled to the first dynamo-electric unit directly or through a first transmission unit and coupled to the first load directly or through a second transmission unit;
• a second drive system for driving a second load;
• the second drive system including a second dynamo-electric unit, the second load being couple to the second dynamo-electric unit;
• and
• a first clutch provided between and coupled to the engine and the second dynamo-electric unit;
• wherein when the system operates as the series power drive system, the first clutch is disengaged so as to prevent a rotational kinetic energy from the engine from being transmitted to the second drive system, a portion of a rotational kinetic energy from the engine drives the first load, another portion of the rotational kinetic energy from the engine drives the first dynamo-electric unit to operate as a generator, and power from the first dynamo-electric unit drives the second dynamo-electric unit to function as a motor for driving the second load;
• and
• wherein when the system operates as the parallel power drive system, the first clutch is engaged so as to allow the rotational kinetic energy from the engine to be transmitted to the second drive system, a portion of the rotational kinetic energy from the engine drives the first load, and another portion of the rotational kinetic energy from the engine directly drives the second dynamo-electric unit to function as a motor for driving the second load.

A split series-parallel hybrid dual-power drive system operable alternatively as a series power drive system or a parallel power drive system comprising:

• a first drive system for driving a first load, the first drive system including an engine and a first dynamo-electric unit, the engine having a rotary part coupled to thee first dynamo-electric unit directly or through a first transmission unit;
• a second drive system for driving a second load;
• the second drive system including a second dynamo-electric unit, the second load being couple to the second dynamo-electric unit directly or through a second transmission unit;
• a first clutch provided between and coupled to the engine and the second dynamo-electric unit;
• a second clutch provided between and coupled to the first dynamo-electric unit and the first load;
• a rechargeable device coupled to at least one of the first and second dynamo-electric units, the rechargeable device being rechargeable, when at least one of a first and a second load is a light load that is more than a normal load, by power from either the first or the second dynamo-electric unit, the rechargeable device driving at least one of the first and second dynamo-electric units to function as a motor when at least one of the first and second loads is a heavy load that is more than the normal load;
• and
• a drive control unit for controlling the first drive system, the second drive system, the first and second clutches, and the rechargeable device;
• wherein when the system operates as the series power drive system, the first clutch is disengaged so as to prevent a rotational kinetic energy from the engine from being transmitted to the second drive system, the second clutch is disengaged, so that the engine is capable of running at lower fuel consumption with higher fuel saving so as to reach brake specific fuel consumption, and an electric power from the first dynamo-electric unit drives the second dynamo-electric unit via the control unit to drive the second load;
• and
• wherein when the system operates as the parallel power drive system, the first clutch is engaged so as to allow the rotational kinetic energy from the engine to be transmitted to the second drive system.

A split series-parallel hybrid dual-power drive system operable alternatively as a series power drive system or a parallel power drive system comprising:

• a first drive system for driving a first load, the first drive system including an engine and a first dynamo-electric unit, the engine having a rotary part coupled to thee first dynamo-electric unit directly or through a first transmission unit;
• a second drive system for driving a second load;
• the second drive system including a second dynamo-electric unit, the second load being couple to the second dynamo-electric unit directly or through a second transmission unit;
• a first clutch provided between and coupled to the engine and the second dynamo-electric unit;
• a second clutch provided between and coupled to the first dynamo-electric unit and the first load;
• a rechargeable device coupled to at least one of the first and second dynamo-electric units, the rechargeable device being rechargeable, when at least one of a first and a second load is a light load that is more than a normal load, by power from either the first or the second dynamo-electric unit, the rechargeable device driving at least one of the first and second dynamo-electric units to function as a motor when at least one of the first and second loads is a heavy load that is more than the normal load;
• and
• a drive control unit for controlling the first drive system, the second drive system, the first and second clutches, and the rechargeable device;
• wherein when the system operates as the series power drive system, the first clutch is disengaged so as to prevent a rotational kinetic energy from the engine from being transmitted to the second drive system, the second clutch is disengaged, so that the engine is capable of running at lower fuel consumption with higher fuel saving so as to reach brake specific fuel consumption, and an electric power from the first dynamo-electric unit drives the second dynamo-electric unit via the control unit to drive the second load;
• wherein when the system operates as the parallel power drive system, the first clutch is engaged so as to allow the rotational kinetic energy from the engine to be transmitted to the second drive system;
• wherein when the first load is a light load that is less than a normal load, the first clutch is disengaged and a first portion of the rotational kinetic energy from the engine drives the first load and a second portion of the rotational kinetic energy from the engine drives the first dynamo-electric unit to operate as a generator, and power from the first dynamo-electric unit drives the second dynamo-electric unit to function as a motor to drive the second load;
• wherein when the first load is a normal load, the first clutch is disengaged, so that the rotational kinetic from the engine drives the first load;
• wherein when the second load is a normal load, the first clutch is closed and the second clutch is disengaged, so that the engine drives the second load;
• wherein when the first and second loads are normal loads, the first and second clutched are both closed, so that the engine drives the first and second loads;
• wherein when the first load is a heavy load that is more than the normal load, power from the rechargeable device drives the first dynamo-electric unit to operate as a motor, and the rotational kinetic energy from the engine combined with a rotational kinetic energy from the first dynamo-electric unit drives the first load;
• wherein when the system operates as the parallel power drive system, the first clutch is engaged so as to allow the rotational kinetic energy from the engine to be transmitted to the second drive system;
• wherein when the system operates as the parallel power drive system and when at least one of the first and second loads is the light load, a third portion of the rotational kinetic energy from the engine is available to drive the light load and a fourth portion of the rotational kinetic energy from the engine drives at least one of the first and second dynamo-electric units coupled to the light load to operate as a generator either for recharging the rechargeable device or for driving a third load;
• and
• wherein when the system operates as the parallel power drive system and when at least one of the first and second loads is a heavy load, the power from the rechargeable device drives at least one of the first and second dynamo-electric units coupled to the heavy load to operate as a motor, and the rotational kinetic energy from the engine combined with the rotational kinetic energy from the at least one of the first and second dynamo-electric units drives the heavy load.