Apparatus for controlling a hybrid drive system for a motor vehicle, an industrial truck in particular

An apparatus for controlling a hybrid drive system for a motor vehicle, with an internal combustion engine BKM, an accumulator for electric energy, an apparatus for acquiring the charge condition SOC of the accumulator, at least one electric engine E1/E2, which is connectable to the electric accumulator, and at least one gearbox arrangement, via which the internal combustion engine BKM, the electric engine E1/E2 and at least one wheel of the vehicle can be coupled to each other, the apparatus comprising:

• a desired value transmitter for a travelling speed v, which presets a desired-signal for the desired travelling speed;
• an actual value transmitter for the travelling speed v, which generates an actual-signal from the travelling speed;
• a first controlling device for the travelling speed v, in which the desired value for the travelling speed is compared with the actual value of the travelling speed, and a speed controller which establishes a desired driving torque M-soll;
• a torque calculation stage, topped by the first controlling device, which establishes the desired torque values for the internal combustion engine BKM as well as the desired values for the electric engine E1/E2 from the desired driving torque M-soll or a signal corresponding to the same, kinematic conditions of the gearbox arrangement and the actual rotational speed of the electric engine E1/E2 needed for this;
• a first characteristic curve stage with at least one characteristic curve, which associates approximately optimum rotational speeds to the desired torque values of the internal combustion engine and which presets a desired-signal for the rotational speed of the internal combustion engine;
• a second controlling device, with a comparison of the desired and the actual values for the internal combustion engine BKM, which drives the internal combustion engine BKM such that the deviations become sufficiently small;
• a third controlling device with a comparison of the desired and the actual values of the torques and currents, respectively, of the electric engine E/1/E2, which drives the electric engine E/1/E2 such that the deviations become sufficiently small;
• further characterised in that the gearbox arrangement has at least one changeover or variable speed gearbox (2), the input of which is coupled with the driven shaft of the internal combustion engine BKM and the output of which is coupled with the driven shaft (5), and that at least one first cross gear set (1) is provided, the inputs of which are coupled with the driven shaft of the changeover or variable speed gearbox (2) and the driven shaft of the electric engine E1, and the output of which is coupled with the driven shaft (5) of the drive system.

An apparatus for controlling a hybrid drive system for a motor vehicle, with an internal combustion engine BKM, an accumulator for electric energy, an apparatus for acquiring the charge condition SOC of the accumulator, at least one electric engine E1/E2, which is connectable to the electric accumulator, and at least one gearbox arrangement, via which the internal combustion engine BKM, the electric engine E1/E2 and at least one wheel of the vehicle can be coupled to each other, the apparatus comprising:

• a desired value transmitter for a travelling speed v, which presets a desired-signal for the desired travelling speed;
• an actual value transmitter for the travelling speed v, which generates an actual-signal from the travelling speed;
• a first controlling device for the travelling speed v, in which the desired value for the travelling speed is compared with the actual value of the travelling speed, and a speed controller which establishes a desired driving torque M-soll;
• a torque calculation stage, topped by the first controlling device, which establishes the desired torque values for the internal combustion engine BKM as well as the desired values for the electric engine E1/E2 from the desired driving torque M-soll or a signal corresponding to the same, kinematic conditions of the gearbox arrangement and the actual rotational speed of the electric engine E1/E2 needed for this;
• a first characteristic curve stage with at least one characteristic curve, which associates approximately optimum rotational speeds to the desired torque values of the internal combustion engine and which presets a desired-signal for the rotational speed of the internal combustion engine;
• a second controlling device, with a comparison of the desired and the actual values for the internal combustion engine BKM, which drives the internal combustion engine BKM such that the deviations become sufficiently small;
• a third controlling device with a comparison of the desired and the actual values of the torques and currents, respectively, of the electric engine E/1/E2, which drives the electric engine E/1/E2 such that the deviations become sufficiently small;
• further characterised in that the gearbox arrangement has at least one first cross gear set (2), the inputs of which are coupled with the driven shaft of the internal combustion engine BKM and the driven shaft of the electric engine E1, and the output of which is coupled with the driven shaft (5) of the drive system, and which has at least one changeover or variable speed gearbox (1) in the train of the driven shaft (5).

An apparatus for controlling a hybrid drive system for a motor vehicle, with an internal combustion engine BKM, an accumulator for electric energy, an apparatus for acquiring the charge condition SOC of the accumulator, at least one electric engine E1/E2, which is connectable to the electric accumulator, and at least one gearbox arrangement, via which the internal combustion engine BKM, the electric engine E1/E2 and at least one wheel of the vehicle can be coupled to each other, the apparatus comprising:

• a desired value transmitter for a travelling speed v, which presets a desired-signal for the desired travelling speed;
• an actual value transmitter for the travelling speed v, which generates an actual-signal from the travelling speed;
• a first controlling device for the travelling speed v, in which the desired value for the travelling speed is compared with the actual value of the travelling speed, and a speed controller which establishes a desired driving torque M-soll;
• a torque calculation stage, topped by the first controlling device, which establishes the desired torque values for the internal combustion engine BKM as well as the desired values for the electric engine E1/E2 from the desired driving torque M-soll or a signal corresponding to the same, kinematic conditions of the gearbox arrangement and the actual rotational speed of the electric engine E1/E2 needed for this;
• a first characteristic curve stage with at least one characteristic curve, which associates approximately optimum rotational speeds to the desired torque values of the internal combustion engine and which presets a desired-signal for the rotational speed of the internal combustion engine;
• a second controlling device, with a comparison of the desired and the actual values for the internal combustion engine BKM, which drives the internal combustion engine BKM such that the deviations become sufficiently small;
• a third controlling device with a comparison of the desired and the actual values of the torques and currents, respectively, of the electric engine E/1/E2, which drives the electric engine E/1/E2 such that the deviations become sufficiently small;
• further characterised in that the gearbox arrangement has at least one first cross gear set (2.1), the inputs of which are coupled with the driven shaft of the internal combustion engine BKM and the driven shaft of a first electric engine E1, and the output of which is coupled with the driven shaft (5) of the drive system, and that it has at least one changeover or variable speed gearbox (1), the input of which is coupled with the driven shaft of the first cross gear set (2.1) and that it has a second cross gear set (2.2), the inputs of which are coupled with the driven shaft of the changeover or variable speed gearbox (1) and the driven shaft of a second electric engine E2, and the output of which is coupled with the driven shaft (5) of the system.