Turbo lag boost compensation method, apparatus, and device

Patent metadata

Field	Value
Publication number	US-12522201-B2
Application number	US-202117790232-A
Country	US
Kind code	B2
Filing date	Jan 14, 2021
Priority date	Jan 14, 2020
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A turbo lag boost compensation method is provided, including: calculate a theoretically required boost torque Ts; compare the theoretically required boost torque Ts with the maximum output torque Tpmax of a P2 motor; when Ts≥Tpmax, a required output boost torque Ts′ is equal to Tpmax; when Ts<Tpmax, the required output boost torque Ts′ is equal to Ts; determine whether a turbo lag boost timing is activated; if yes, output the required output boost torque Ts′; and if not, the boost torque is zero. Also provided are a turbo lag boost compensation apparatus, a turbo lag boost compensation device, a hybrid power vehicle, and a storage medium. The present invention effectively solves adverse effects such as a slow torque response and a sudden torque change caused by a turbo lag on an entire vehicle, and improves the drivability and power of the entire vehicle.

First claim

What is claimed is:

1 . A turbo lag boost compensation method implemented by a turbo lag boost compensation device comprising one or more processors, the turbo lag boost compensation method comprising:
calculating theoretical required boost torque Ts; determining required output boost torque Ts′ according to a magnitude relationship between the theoretical required boost torque Ts and maximum torque Tpmax enabled to be output by a P 2 motor; determining whether timing for turbo lag boost is activated; outputting the determined required output boost torque Ts′ when the timing for the turbo lag boost is activated; and determining boost torque as zero when the timing for the turbo lag boost is not activated; determining whether the required output boost torque Ts′ is in a boost interval; determining, when the required output boost torque Ts′ falls within the boost interval, whether the vehicle is in a launch operation condition so as to determine whether it is suitable for activating a boost compensation; and activating the boost compensation and providing boost for the vehicle by the P 2 motor, when the vehicle is not in the Launch operation condition; wherein the theoretical required boost torque Ts is calculated according to Ts=Td−(Ti+Tm); wherein: Td is instant required torque of an entire vehicle, Ti is instant actual torque of a turbocharged engine, Tm is instant required torque of the P 2 motor.

2 . The method according to claim 1 , wherein said determining required output boost torque Ts′ according to a magnitude relationship between the theoretical required boost torque Ts and maximum torque Tpmax enabled to be output by a P 2 motor comprises:
when Ts≥Tpmax, determining the required output boost torque Ts′ as Ts′=Tpmax;
when Ts<Tpmax, determining the required output boost torque Ts′ as Ts′=Ts.

3 . A turbo lag boost compensation device, comprising:
one or more processors;
a storage apparatus configured to store one or more programs;
wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement steps of:
calculating theoretical required boost torque Ts;
determining required output boost torque Ts′ according to a magnitude relationship between the theoretical required boost torque Ts and maximum torque Tpmax enabled to be output by a P 2 motor;
determining whether timing for turbo lag boost is activated;
outputting the determined required output boost torque Ts′ when the timing for the turbo lag boost is activated; and determining boost torque as zero when the timing for the turbo lag boost is not activated;
determining whether the required output boost torque Ts′ is in a boost interval;
determining, when the required output boost torque Ts′ falls within the boost interval, whether the vehicle is in a launch operation condition so as to determine whether it is suitable for activating a boost compensation; and
activating the boost compensation and providing boost for the vehicle by the P 2 motor, when the vehicle is not in the Launch operation condition;
wherein the theoretical required boost torque Ts is calculated according to Ts=Td−(Ti+Tm);
wherein:
Td is instant required torque of an entire vehicle,
Ti is instant actual torque of a turbocharged engine,
Tm is instant required torque of the P 2 motor.

4 . The method according to claim 1 , wherein the timing for the turbo lag boost comprises a theoretical boost timing and an actual boost timing, and said determining whether timing for turbo lag boost is activated comprises:
determining whether both the theoretical boost timing and the actual boost timing are activated.

5 . The method according to claim 4 , wherein said determining whether the actual boost timing is activated comprises:
determining whether an entire vehicle is in a clutch start operating condition, determining not to activate the actual boost timing when it is determined that the entire vehicle is in the clutch start operating condition, and determining to activate the actual boost timing when it is determined that the entire vehicle is not in the clutch start operating condition.

6 . The method according to claim 4 , wherein said determining whether the theoretical boost timing is activated comprises:
determining a boost interval value of a turbocharged engine under a current operating condition; comparing the required output boost torque Ts′ with the boost interval value; determining to activate the theoretical boost timing when the required output boost torque Ts′>the boost interval value; determining not to activate the theoretical boost timing when the required output boost torque Ts′≤the boost interval value.

7 . The method according to claim 6 , wherein said determining a boost interval value of a turbocharged engine under a current operating condition comprises:
according to an engine rotation speed and engine torque of the turbocharged engine under the current operating condition, looking for the corresponding boost interval value from a pre-calibrated table comprising a corresponding relationship between different engine rotation speeds, engine torque and boost interval values.

8 . The method according to claim 1 , wherein before outputting the required output boost torque Ts′, the method further comprises performing filtering on the required output boost torque Ts′.

9 . A turbo lag boost compensation apparatus, comprising:
a calculation module configured to calculate theoretical required boost torque Ts; a determination module configured to determine required output boost torque Ts′ according to a magnitude relationship between the theoretical required boost torque Ts and maximum torque Tpmax enabled to be output by a P 2 motor; a judgment module configured to determine whether timing for turbo lag boost is activated; an output module configured to output the determined required output boost torque Ts′ when the timing for the turbo lag boost is activated; wherein the judgement module is further configured to:
determine whether the required output boost torque Ts′ is in a boost interval;
determine, when the required output boost torque Ts′ falls within the boost interval, whether the vehicle is in a launch operation condition so as to determine whether it is suitable for activating a boost compensation; and
activate the boost compensation and providing boost for the vehicle by the P 2 motor, when the vehicle is not in the Launch operation condition;

wherein the calculation module comprises:
an acquisition sub-module configured to acquire required torque Td of an entire vehicle, instant actual torque Ti of a turbocharged engine, and required torque Tm of the P 2 motor;
a calculation sub-module configured to calculate and acquire the theoretical required boost torque Ts by adopting a formula Ts=Td−(Ti+Tm).

10 . The apparatus according to claim 9 , wherein the timing for the turbo lag boost comprises a theoretical boost timing and an actual boost timing, and the judgment module comprises:
a first judgment sub-module configured to: determine whether the required output boost torque Ts′ is greater than a pre-configured boost interval value, and determine to activate the theoretical boost timing when the required output boost torque Ts′ is greater than a pre-configured boost interval value; a second judgment sub-module configured to determine whether an entire vehicle is in a clutch start operating condition, and determine to activate the actual boost timing when the entire vehicle is not in the clutch start operating condition; wherein the timing for the turbo lag boost is activated when both the theoretical boost

Assignees

• Great Wall Motor Co Ltd

Inventors

• Zhang Jie
• Wang Hailan
• Zhang Lei
• Wang Xiao
• Song Haijun
• Sun Yan

Classifications

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title

• B60W10/02

  including control of driveline clutches · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• B60W10/06

  including control of combustion engines · CPC title