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CN-122003541-A - Vehicle final stage for actuating at least one load having inductive properties

CN122003541ACN 122003541 ACN122003541 ACN 122003541ACN-122003541-A

Abstract

The invention relates to a final stage (10) of a vehicle (100) for actuating at least one load (12) having inductive properties, comprising a control device (14), an input module (16) which can be connected to a voltage source (102) of the vehicle (100), a voltage boosting device (18) which is provided for boosting a voltage (52) of the voltage source (102) of the vehicle (100) to a predetermined boost voltage (46), a high-side output contact (11) and at least one low-side output contact (13), between which the at least one load (12) can be connected, a high-side switch (24) which is connected to the input module (16) and the high-side output contact (11), a boost switch (42) which is connected to the high-side output contact (11) and to the boost device (18), wherein the control device (14) is provided for switching the boost switch (42) on in order to apply a boost voltage to the load, wherein the control device (14) is provided for switching the boost voltage (42) off in order to switch the boost voltage (52) on the load (102) if the switch off, and/or the control means (14) are arranged for switching the boost switch (42) off for applying the voltage (52) of the voltage source (102) across the load if the high side switch (24) is switched on.

Inventors

  • H. RAPP
  • S. Brickland

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260508
Application Date
20240730
Priority Date
20230809

Claims (20)

  1. 1. Final stage (10) of a vehicle (100) for handling at least one load (12) having inductive properties, comprising: A control device (14), An input assembly (16) connectable to a voltage source (102) of the vehicle (100), A boosting device (18) which is provided for boosting the voltage (52) of the voltage source (102) of the vehicle (100) to a predetermined boosting voltage (46), A high-side output contact (11) and at least one low-side output contact (13), between which the at least one load (12) can be connected, A high-side switch (24) connected to the input assembly (16) and to the high-side output contact (11), A boost switch (42) connected to the high-side output contact (11) and to the boost device (18), Wherein the control device (14) is arranged for switching the boost switch (42) on for applying a boost voltage across the load, Wherein the control means (14) are arranged for switching the high-side switch (24) on if the boost switch (42) is switched off, so as to apply the voltage (52) of the voltage source (102) across the load, And/or the control means (14) are arranged for switching the boost switch (42) off if the high-side switch (24) is switched on, so as to apply the voltage (52) of the voltage source (102) across the load.
  2. 2. The final stage (10) according to claim 1, Wherein the control device (14) is configured to switch off the boost switch (42) and the high-side switch (24) in order to apply a voltage on the load (12) that is less than the voltage (52) of the voltage source (102).
  3. 3. Final stage (10) according to claim 1 or 2, Wherein the control device (14) is provided for detecting and/or storing a first switching threshold value (22), a second switching threshold value (26) and an intermediate switching threshold value (20), Wherein the second switching threshold (26) is greater than the first switching threshold (22), wherein the intermediate switching threshold (20) is greater than the first switching threshold (22), and wherein the intermediate switching threshold (20) is less than the second switching threshold (26), Wherein the control means (14) is arranged for switching the boost switch (42) on if the current through the at least one load (12) is smaller than a first switch threshold (22).
  4. 4. The final stage (10) according to claim 3, Wherein the control means (14) is arranged for switching the boost switch (42) and the high-side switch (24) off if the current through the at least one load (12) is greater than a second switching threshold (26).
  5. 5. The final stage (10) according to claim 3 or 4, Wherein the control device (14) is arranged for switching the boost switch (42) off if the current through the at least one load (12) is greater than an intermediate switch threshold (20).
  6. 6. The final stage (10) according to any one of claims 3 to 5, Wherein the control device (14) is configured to switch the boost switch (42) and/or the high-side switch (24) on if the current through the at least one load (12) is smaller than an intermediate switch threshold (20).
  7. 7. Final stage (10) according to any one of claims 3 to 6, Wherein the control means (14) are arranged for switching the boost switch (42) off and the high side switch (24) on, and/or if the current through the at least one load (12) is smaller than the second switching threshold (26) and larger than the intermediate switching threshold (20) and the boost switch (42) is switched on Wherein the control device (14) is configured to maintain a currently existing first switching state of the high-side switch (24) and the boost switch (42) if the current through the at least one load (12) is less than a second switching threshold (26) and greater than an intermediate switching threshold (20) and the boost switch (42) is switched off, and/or Wherein the control means (14) are arranged for switching the high side switch (24) on if the current through the at least one load (12) is smaller than the intermediate switch threshold (20) and larger than the first switch threshold (22) and the boost switch (42) and the high side switch (24) are both switched off, and/or Wherein the control means (14) are arranged for maintaining a currently existing second switching state of the high side switch (24) and the boost switch (42) if the current through the at least one load (12) is smaller than the intermediate switch threshold (20) and larger than the first switch threshold (22) and the high side switch (24) is switched on.
  8. 8. The final stage (10) according to any one of claims 3 to 7, Wherein the intermediate switching threshold (20) comprises a lower intermediate switching threshold (30) and an upper intermediate switching threshold (28), wherein the lower intermediate switching threshold (30) is greater than the first switching threshold (22) and less than the second switching threshold (26), the upper intermediate switching threshold (28) is greater than the lower intermediate switching threshold (30) and less than the second switching threshold (26), Wherein the control means (14) are arranged for switching the boost switch (42) on, and/or if the current through the at least one load (12) is smaller than a first switch threshold (22) Wherein the control device (14) is configured to switch the boost switch (42) and the high-side switch (24) off and/or to switch the boost switch (42) and the high-side switch (24) off if the current through the at least one load (12) is greater than a second switching threshold (26), Wherein the control means (14) are arranged for switching the boost switch (42) off, and/or if the current through the at least one load (12) is greater than an upper intermediate switch threshold (28) Wherein the control device (14) is configured to switch the boost switch (42) and/or the high-side switch (24) on if the current through the at least one load (12) is smaller than a lower intermediate switch threshold (30).
  9. 9. The final stage (10) according to claim 8, Wherein the control means (14) are arranged for switching the boost switch (42) off and the high side switch (24) on, and/or if the current through the at least one load (12) is smaller than the second switching threshold (26) and larger than the upper intermediate switching threshold (28) and the boost switch (42) is switched on Wherein the control device (14) is configured to maintain a currently existing third switching state of the high-side switch (24) and the boost switch (42) if the current through the at least one load (12) is smaller than the second switching threshold (26) and larger than the upper intermediate switching threshold (28) and the boost switch (42) is switched off, and/or Wherein the control means (14) are arranged for switching the high side switch (24) on if the current through the at least one load (12) is smaller than the lower intermediate switch threshold (30) and larger than the first switch threshold (22) and the boost switch (42) and the high side switch (24) are both switched off, and/or Wherein the control means (14) are arranged for maintaining a presently existing fourth switching state of the high side switch (24) and the boost switch (42) if the current through the at least one load (12) is smaller than the lower intermediate switch threshold (30) and larger than the first switch threshold (22) and the boost switch (42) is switched on or the high side switch (24) is switched on, and/or Wherein the control device (14) is configured to maintain a currently existing fifth switching state of the high-side switch (24) and the boost switch (42) if the current through the at least one load (12) is smaller than an upper intermediate switching threshold (28) and larger than a lower intermediate switching threshold (30).
  10. 10. Final stage (10) according to any of the preceding claims, wherein the at least one load (12) has at least one solenoid valve.
  11. 11. Final stage (10) according to any one of the preceding claims, Wherein the input assembly (16) has a first input contact (15) and a second input contact (17); Wherein the first input contact (15) has a higher potential than the second input contact (17).
  12. 12. The final stage (10) according to claim 11, Wherein the voltage boosting device (18) has an output contact (51 c), wherein the voltage boosting device (18) is provided for applying the voltage boosting voltage between the output contact (51 c) and the second input contact (17).
  13. 13. Final stage (10) according to claim 11 or 12, wherein the final stage has a freewheel diode (56) connected between the second input contact and a high-side output contact (11).
  14. 14. The final stage (10) according to any one of claims 11 to 13, wherein the final stage has at least one low-side switch (34) connected between a low-side output contact (13) and the second input contact (17), and/or Wherein the final stage (10) has at least one feedback diode (44) which is connected between a low-side output contact (13) and the output contact (51 c).
  15. 15. An introduction assembly (200) for introducing a fluid into a combustion chamber, having a final stage (10) according to any of the preceding claims.
  16. 16. Vehicle (100) with a final stage (10) according to any of the preceding claims and/or with a control device (102) arranged for performing the steps of the method (300) according to any of the following claims.
  17. 17. Method (300) for operating a final stage (10), comprising the steps of: Receiving (S1) a control signal, Switching (S2) the final stage (10) at least to a first switching position or to a second switching position as a function of the control signal, wherein in the first switching position the load (12) is connected to a voltage boosting device (18) in order to apply a voltage boosting voltage to the load (12), Wherein in the second switch position the high side switch (24) is switched on and/or switched on with the load (12) and the boost switch (42) is switched off in order to apply a predetermined voltage across the load (12).
  18. 18. The method of claim 17, further comprising the step of: -switching (S3) the final stage (10) to a third switching position in dependence on the control signal, wherein in the third switching position the boost switch (42) and the high side switch (24) are off.
  19. 19. The method according to claim 17 or 18, further comprising the step of: detecting (S4) a first switching threshold (22), a second switching threshold (26) and an intermediate switching threshold (20), Wherein the second switching threshold (26) is greater than the first switching threshold (22), the intermediate switching threshold (20) is greater than the first switching threshold (22) and less than the second switching threshold (26), -If the current through the load (12) is smaller than a first switching threshold (22), switching to a first switching position (S5), and/or -Switching to a third switch position (S6) if the current through the load (12) is greater than a second switch threshold (26), If the current through the at least one load (12) is smaller than the intermediate switching threshold (20) and larger than the first switching threshold (22), switching either to the first switching position or to the second switching position, -If the current through the at least one load (12) is greater than the intermediate switching threshold (20) and less than the second switching threshold (26), switching either to the second switching position or to the third switching position.
  20. 20. The method according to any one of claim 17 to 19, Wherein the intermediate switching threshold (20) comprises a lower intermediate switching threshold (30) and an upper intermediate switching threshold (28), wherein the intermediate switching threshold (20) is larger than the first switching threshold (22) and smaller than the second switching threshold (26), and the upper intermediate switching threshold (28) is larger than the lower intermediate switching threshold (30) and smaller than the second switching threshold (26), the method further comprising the steps of: -switching to turn off (S7) the boost switch (42) if the current through the at least one load (12) is greater than an upper intermediate switch threshold (28), and/or -Switching (S8) the boost switch (42) and/or the high side switch (24) on if the current through the at least one load (12) is smaller than a lower intermediate switch threshold (30).

Description

Vehicle final stage for actuating at least one load having inductive properties Technical Field The invention relates to a final stage for actuating a blow-in valve or injection valve for gaseous or liquid fuels, a method for operating a final stage, and a vehicle. Background Currently, there are a number of different solutions for blowing combustion gases into or injecting liquid fuel into a combustion chamber. As the demands in the field of blowing and spraying technology and control thereof continue to increase, so does the need for innovative and robust methods. In the automotive field, weight reduction is continuously carried out for the purpose of reducing consumption, and cost pressure is brought about by increasingly strong competition, so that there is a strong demand for inexpensive and efficient vehicle components. Disclosure of Invention The final stage of the vehicle according to the invention for actuating at least one load having inductive properties has the advantage over known solutions that the load of the charging device and the associated charging capacitor for establishing a voltage that is elevated relative to the vehicle supply voltage is significantly reduced within the final stage, since the vehicle supply voltage can be used for operating the at least one load in addition to the charging voltage and the zero voltage in the same time interval by means of the final stage. A further advantage is that with the aid of the final stage a new regulation scheme can be used to control the magnetic circuit in the load. Furthermore, the operating duration of the blowing device can be significantly increased, since a longer service life of the booster capacitor can be achieved by a reduction in the load of the booster capacitor, which can lead to a cost advantage. According to the invention, this object is achieved in that the final vehicle stage for actuating at least one load having inductive properties has a control device. The final stage also has an input assembly connectable to a voltage source of the vehicle. The final stage further has a boosting device, which is provided for boosting the voltage of the vehicle voltage source to a predetermined boosting voltage. The final stage further has a high-side output contact and at least one low-side output contact, between which the at least one load can be connected. The final stage further has a high-side switch, which is connected to the input assembly and to the high-side output contact. The final stage furthermore has a boost switch which is connected to the high-side output contact and to the boost device, wherein the control device is provided for switching the boost switch on for applying a boost voltage to the load, wherein the control device is provided for switching the high-side switch on for applying the voltage of the voltage source to the load when the boost switch is switched off, and/or wherein the control device is provided for switching the boost switch off for applying the voltage of the voltage source to the load when the high-side switch is switched on. In other words, the control device may utilize the boost voltage, the vehicle electrical system voltage and the zero voltage to establish the magnetic field in the at least one load. The at least one load having inductive properties may particularly preferably comprise a solenoid valve. The final stage here comprises an input, preferably having two input terminals, wherein the final stage is connectable at its input to the on-board electrical system of the vehicle. Furthermore, the final stage may comprise a supercharging device. The input terminal of the supercharging device can be connected to the input terminal of the final stage and thus to the on-board electrical system. Furthermore, the boosting device may be provided for generating a boosting voltage that is higher than the vehicle electrical system voltage, so that the boosting voltage can be provided inside the final stage. Furthermore, the final stage may be adapted to apply a boost voltage to the solenoid valve by connecting the high-side output terminal with an output terminal of the boost device and connecting the low-side output terminal with a negative pole of the on-board power supply voltage. It is further preferred that the final stage is adapted to apply the input voltage of the final stage to the solenoid valve by connecting the high-side output terminal with an input terminal connected to the positive voltage pole of the on-board electrical network and the low-side output terminal with an input terminal connected to the negative voltage pole of the on-board electrical network. It is further preferred that the final stage is adapted to short-circuit the solenoid valve and thereby apply a zero voltage to the solenoid valve by connecting both the high-side output terminal and the low-side output terminal to the negative pole of the on-board electrical network at least during a period when the current in