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High-precision torque control method for hybrid power diesel engine

A torque control and hybrid technology, applied in engine control, electrical control, engine components, etc., can solve problems such as high torque accuracy requirements, insufficient torque control accuracy, and gearbox shifting shocks, so as to achieve accurate indication torque and improve Torque control accuracy and the effect of improving accuracy

Active Publication Date: 2021-01-26
DONGFENG OFF ROAD VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, models matched with AT automatic transmissions have high requirements on torque accuracy, so it is necessary to avoid excessive differences between actual torque and bus torque, resulting in insufficient torque control accuracy, failure to achieve functional purposes such as torque limit, and impact on transmission shifting etc. However, traditional torque chain control strategies usually cannot meet this requirement

Method used

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  • High-precision torque control method for hybrid power diesel engine
  • High-precision torque control method for hybrid power diesel engine
  • High-precision torque control method for hybrid power diesel engine

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Embodiment Construction

[0019] The following specific embodiments are used to further describe the technical solution of the claims of the present invention in detail, so that those skilled in the art can understand the claims more clearly. The protection scope of the present invention is not limited to the following specific examples. The protection scope of the present invention includes the technical solution of the claims of the present invention made by those skilled in the art and is different from the following specific embodiments.

[0020] Such as figure 1 As shown, a high-precision torque control method for a hybrid diesel engine is firstly based on the existing engine torque control model, by obtaining the accelerator pedal opening calibration to obtain the required net torque at the power output end, and then adding the friction work of the engine to obtain the engine’s indication torque. Friction work includes water temperature correction torque, zero oil correction torque and accessor...

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Abstract

The invention discloses a high-precision torque control method for a hybrid power diesel engine. The high-precision torque control method is characterized by comprising the following steps of: acquiring an indication torque, and calibrating to obtain an initial value of oil injection quantity; limiting the initial value of oil injection quantity based on a maximum limit value of accelerated smokeintensity and atmospheric density to obtain a limit value of oil injection quantity; and correcting the fuel injection quantity according to the combustion efficiency and the intercooled temperature to obtain a fuel injection quantity correction value, and controlling the actual fuel injection quantity of the engine to be the fuel injection quantity correction value. Accessory work is added when the indication torque is determined, the accessory work is corrected based on the water temperature of the engine, and the indication torque is more accurate. The fuel injection quantity correction value is obtained by comprehensively considering the influence of various factors, so that under the actual fuel injection quantity, the error between the actually measured flywheel end output torque andthe bus net torque can be reduced, and the torque control precision is improved.

Description

technical field [0001] The invention relates to the technical field of engine control, in particular to a high-precision torque control method for a hybrid diesel engine. Background technique [0002] Usually, diesel engines follow the SAE J1939 protocol to transmit torque information by sending and receiving messages through the bus, and obtain the corresponding torque through combustion control for the torque demand of the system, and then send various torques to the bus through messages, so as to achieve the target demand Torque control is usually used for functional requirements such as engine torque limit and vehicle gear shifting. [0003] Since traditional diesel engines are mostly matched with manual transmission models, the requirements for bus torque accuracy are not high, and the torque chain is usually relatively simple. For a hybrid diesel engine, when the flywheel motor is involved in power generation, the torque chain of the power system will change greatly. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30F02D29/02F01P11/16
CPCF02D41/30F02D29/02F01P11/16F02D2200/1002Y02T10/62
Inventor 陈守涛杨细元谢国法王黎明林宝德
Owner DONGFENG OFF ROAD VEHICLE CO LTD
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