Car borne real time statistical method for load factor of engine

A technology of engine load and statistical methods, applied in engine control, machine/engine, mechanical equipment, etc., can solve problems such as complex control strategies

Active Publication Date: 2007-12-26
DONGFENG MOTOR CORP HUBEI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These electronic control units come in various forms, and their software control strategies are quite complicated. During the driving process of the vehicle, a lot of information such as en

Method used

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  • Car borne real time statistical method for load factor of engine
  • Car borne real time statistical method for load factor of engine
  • Car borne real time statistical method for load factor of engine

Examples

Experimental program
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Example Embodiment

[0027] Figure 1 shows the connection diagram of the control unit and the diagnostic instrument used by the utility model to complete the load rate statistical function, and the flow of data calculation processing.

[0028] The engine electronic control unit collects the speed sensor signal and calculates the engine speed value; then according to the engine speed value and the fuel injection quantity of the engine, the engine torque value is calculated by looking up the table. The engine electronic control unit sends the engine speed and engine torque to the CAN bus in accordance with the SAE J1939 protocol.

[0029] The vehicle electronic control unit receives the engine speed and engine output torque signals from the CAN bus, and inputs them to the arithmetic processing module.

[0030] The engine speed and engine torque value determine the operating point of the engine. The engine speed is divided into m points from the lowest to the highest (generally range from 7 to 15), and t...

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Abstract

This invention provides a car-carrying real time statistic method for load rate of engines including: 1, dividing the rotation speed of an engine into m points from bottom to high, dividing a torque to n points from bottom to high to compose a data table storing operating time of m*n duty regions to be stored in a RAM of a car electric control unit, 2, when the engine operates, the control unit collects data of rotation speed and torque of the engine sent by the control unit by a CAN bus line and accumulates the operation time of the duty regions by looking up two corresponding elements, 3, before the control unit is turned off, the data table stored in the RAM is copied in EEPROM and stored, 4, when the control unit is re-turned on, the RAM is initialized based on the data table read in the EEPROM, 5, a diagnosis device reads the data table stored in the RAM and computes the load rate parameters of the duty regions.

Description

technical field [0001] The invention relates to a vehicle-mounted real-time statistical method of engine load rate, which is a method for automatically counting the running time of each working condition of the engine and calculating the engine load rate during vehicle operation, and is suitable for vehicles equipped with an engine electronic control unit or a vehicle electronic control unit For commercial vehicles or passenger vehicles, it has a guiding effect on improving the fuel economy of the vehicle. Background technique [0002] With the formal implementation of the National Emission Regulation III, more and more commercial vehicles equipped with electronically controlled diesel engines are put on the market. On the one hand, the electronically controlled diesel engine greatly improves the emission performance of the vehicle, on the other hand, the fuel consumption rate is also significantly lower than that of a mechanical diesel engine. Even so, with the soaring fue...

Claims

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Application Information

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IPC IPC(8): F02D29/02
Inventor 李祖元唐西清顾斌聂文平
Owner DONGFENG MOTOR CORP HUBEI
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