Intelligent pre-starting control system of engine

Abstract

The invention discloses an intelligent engine pre-starting control system, relates to the technical field of engine electric control, and solves the technical problems that the existing manual starting electric pre-feeding oil pump control mode is not flexible, and the starting time cannot be controlled according to the engine oil pressure and temperature, so that the service life of a starting motor is influenced. The system comprises a CAN instrument, an ECU, an engine oil pressure and temperature sensor and a whole vehicle wire harness, the CAN instrument is electrically connected with the ECU through the whole vehicle wire harness, the engine oil pressure and temperature sensor is electrically connected with the ECU through the whole vehicle wire harness, and the CAN instrument collects the real-time engine oil pressure output by the engine oil pressure and temperature sensor through the whole vehicle wire harness and sends the real-time engine oil pressure to the ECU through the whole vehicle wire harness. The ECU collects the real-time engine oil temperature output by the engine oil pressure and temperature sensor through the whole vehicle wire harness. Accurate control over the electric oil pre-supply pump is achieved, and the control flexibility of the electric oil pre-supply pump is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine electronic control, more particularly, it relates to an engine intelligent pre-start control system. BACKGROUND

[0002] The traditional engine has small volume, the diameter of the lubricating oil pipeline is relatively small, the motor drag start speed is high, the oil pressure is relatively fast to establish, and the auxiliary electric pre-oil pump does not need to be installed. The large-bore design is different, the lubricating pipeline is large, the motor drag speed is low, and if the auxiliary pre-oil lubrication is not increased, the lubrication effect is not good, and even the cold start may damage the engine. However, the existing instrument start control logic can only manually set a fixed start time, and each time the start button of the instrument is pressed manually, the start is allowed only after the pre-oil supply time, and the start time cannot be controlled according to the oil pressure and temperature. The control mode is not flexible, and the service life of the starting motor may be affected during long-term use. SUMMARY

[0003] The technical problem to be solved by the present application is to solve the technical problem of the prior art, that is, to provide an engine intelligent pre-start control system, which solves the technical problem of the prior art that the manual start electric pre-oil pump control mode is not flexible, and the start time cannot be controlled according to the oil pressure and temperature, thereby affecting the service life of the starting motor.

[0004] The engine intelligent pre-start control system comprises a CAN instrument, an ECU, an oil pressure and temperature sensor and a vehicle harness, the CAN instrument is electrically connected with the ECU through the vehicle harness, the oil pressure and temperature sensor is electrically connected with the ECU through the vehicle harness, the CAN instrument collects the real-time oil pressure output by the oil pressure and temperature sensor through the vehicle harness, and the ECU collects the real-time oil temperature output by the oil pressure and temperature sensor through the vehicle harness.

[0005] When the start button on the CAN instrument is pressed, the ECU determines the start control state according to the real-time oil temperature, determines the starting oil pressure threshold according to the start control state, and triggers the pre-start control strategy according to the start control state, the real-time oil pressure and the starting oil pressure threshold.

[0006] Further improvement, the start control state includes a cold machine state, a cold machine-hot machine transition state and a hot machine state.

[0007] Further, the pre-start control strategy is,

[0008] When the starting control state is the cold engine state, the starter oil pressure threshold is a preset first pressure threshold, when the real-time engine oil pressure is greater than or equal to the first pressure threshold, the engine is started; when the real-time engine oil pressure is less than the first pressure threshold, the electric pre-oil pump is started to increase the real-time engine oil pressure to the first pressure threshold;

[0009] When the starting control state is the cold engine-warm engine transition state, the starter oil pressure threshold is a preset second pressure threshold, when the real-time engine oil pressure is greater than or equal to the second pressure threshold, the engine is started; when the real-time engine oil pressure is less than the second pressure threshold, the electric pre-oil pump is started to increase the real-time engine oil pressure to the second pressure threshold;

[0010] When the starting control state is the warm engine state, the starter oil pressure threshold is a preset third pressure threshold, when the real-time engine oil pressure is greater than or equal to the third pressure threshold, the engine is started; when the real-time engine oil pressure is less than the third pressure threshold, the electric pre-oil pump is started to increase the real-time engine oil pressure to the third pressure threshold.

[0011] Further, the first pressure threshold is 150 kpa, the second pressure threshold is 120 kpa, and the third pressure threshold is 100 kpa,

[0012] Further, when the real-time engine oil temperature is less than a preset first temperature threshold, the starting control state is determined to be the cold engine state.

[0013] When the real-time engine oil temperature is greater than or equal to a preset second temperature threshold and less than or equal to a preset third temperature threshold, the starting control state is determined to be the cold engine-warm engine transition state.

[0014] When the real-time engine oil temperature is greater than the third temperature threshold, the starting control state is determined to be the warm engine state.

[0015] Further, the first temperature threshold is 30℃, the second temperature threshold is 40℃, and the third temperature threshold is 60℃.

[0016] Advantages

[0017] The present application has the advantages of:

[0018] The application acquires real-time oil pressure and real-time oil temperature through the oil pressure temperature sensor by pressing the start button on the CAN instrument, determines the start control state of the ECU according to the real-time oil temperature, determines the starting oil pressure threshold according to the start control state, and starts the starting motor to start the engine when the real-time oil pressure is greater than or equal to the starting oil pressure threshold, so that the engine can be fully lubricated, the working time of the electric pre-oil pump is not too long, the service life of the electric pre-oil pump is prolonged, accurate control of the electric pre-oil pump is realized, and the control flexibility is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic diagram of the engine intelligent pre-start control system of the application.

[0020] Among them: 1-CAN instrument, 2-ECU, 3-oil pressure temperature sensor, 4-vehicle wire harness, 5-starting motor, 6-starting motor control line, 7-relay of electric pre-oil pump, 8-relay control line, 9-battery, 10-generator, 11-electric pre-oil pump. DETAILED DESCRIPTION

[0021] The application will be further described below in conjunction with the embodiments, but does not constitute any limitation to the application, and any limited number of modifications made by anyone within the scope of the claims of the application is still within the scope of the claims of the application.

[0022] Reference Figure 1 The application is an engine intelligent pre-start control system, which comprises a CAN instrument 1, an ECU 2, an oil pressure temperature sensor 3 and a vehicle wire harness 4. The CAN instrument 1 is electrically connected with the ECU 2 through the vehicle wire harness 4, the oil pressure temperature sensor 3 is electrically connected with the ECU 2 through the vehicle wire harness 4, the CAN instrument 1 collects the real-time oil pressure output by the oil pressure temperature sensor 3 through the vehicle wire harness 4, and the ECU 2 collects the real-time oil temperature output by the oil pressure temperature sensor 3 through the vehicle wire harness 4. The ECU 2 controls the electric pre-oil pump 11 and the starting motor of the starting motor 5 through the vehicle wire harness 4.

[0023] Pressing the start button on the CAN instrument 1, the ECU 2 determines the start control state according to the real-time oil temperature, determines the starting oil pressure threshold according to the start control state, and triggers the pre-start control strategy according to the start control state, the real-time oil pressure and the starting oil pressure threshold. The pre-start control strategy can protect the engine from being fully lubricated, and the working time of the electric pre-oil pump 11 is not too long, the service life of the electric pre-oil pump 11 is prolonged, accurate control of the electric pre-oil pump 11 is realized, and the control flexibility is improved.

[0024] The start control state includes a cold machine state, a cold machine-hot machine transition state and a hot machine state.

[0025] The pre-start control strategy is as follows: when the start control state is cold, the starter oil pressure threshold is a preset first pressure threshold. When the real-time oil pressure is greater than or equal to the first pressure threshold, the starter motor 5 of the starter motor is started to start the engine. When the real-time oil pressure is less than the first pressure threshold, the electric pre-supply oil pump 11 is started to raise the real-time oil pressure to the first pressure threshold.

[0026] When the start control state is in the cold-to-hot transition state, the starter oil pressure threshold is the preset second pressure threshold. When the real-time oil pressure is greater than or equal to the second pressure threshold, the engine is started. When the real-time oil pressure is less than the second pressure threshold, the electric pre-supply pump 11 is started to raise the real-time oil pressure to the second pressure threshold.

[0027] When the start control state is a warm-up state, the starter oil pressure threshold is a preset third pressure threshold. When the real-time oil pressure is greater than or equal to the third pressure threshold, the engine is started; when the real-time oil pressure is less than the third pressure threshold, the electric pre-supply oil pump 11 is activated to raise the real-time oil pressure to the third pressure threshold. In this embodiment, the first pressure threshold is 150 kPa, the second pressure threshold is 120 kPa, and the third pressure threshold is 100 kPa.

[0028] When the real-time oil temperature is lower than a preset first temperature threshold, the starting control state is determined to be a cold start state. When the real-time oil temperature is greater than or equal to a preset second temperature threshold and less than or equal to a preset third temperature threshold, the starting control state is determined to be a cold start-to-warm start transition state. When the real-time oil temperature is greater than the third temperature threshold, the starting control state is determined to be a warm start state. In this embodiment, the first temperature threshold is 30°C, the second temperature threshold is 40°C, and the third temperature threshold is 60°C.

[0029] The starter motor 5 of the CAN instrument 1 is controlled in conjunction with the program of ECU2. Currently, the ECU can be set to three starting states. When the start button of CAN instrument 1 is pressed, ECU2 will determine which program to call based on the actual oil temperature. The starter motor is only allowed to work when the oil pressure reaches the set value. If the oil pressure does not reach the set value, the starter motor will not work even if the start button is pressed. The core is to achieve precise control of the oil pump.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. An intelligent pre-start control system for an engine, characterized in that, The system includes a CAN instrument (1), an ECU (2), an oil pressure and temperature sensor (3), and a vehicle wiring harness (4). The CAN instrument (1) is electrically connected to the ECU (2) through the vehicle wiring harness (4). The oil pressure and temperature sensor (3) is electrically connected to the ECU (2) through the vehicle wiring harness (4). The CAN instrument (1) collects the real-time oil pressure output by the oil pressure and temperature sensor (3) through the vehicle wiring harness (4). The ECU (2) collects the real-time oil temperature output by the oil pressure and temperature sensor (3) through the vehicle wiring harness (4). When the start button on the CAN instrument (1) is pressed, the ECU (2) determines the start control state based on the real-time oil temperature, determines the starter oil pressure threshold based on the start control state, and triggers the pre-start control strategy based on the start control state, the real-time oil pressure, and the starter oil pressure threshold.

2. The intelligent pre-start control system for an engine according to claim 1, characterized in that, The start-up control states include cold start state, cold start-to-hot start transition state, and hot start state.

3. The intelligent pre-start control system for an engine according to claim 2, characterized in that, The pre-startup control strategy is as follows: When the starting control state is cold engine state, the starter oil pressure threshold is a preset first pressure threshold. When the real-time oil pressure is greater than or equal to the first pressure threshold, the engine is started. When the real-time oil pressure is less than the first pressure threshold, the electric pre-supply pump (11) is started to raise the real-time oil pressure to the first pressure threshold. When the starting control state is a cold-to-hot transition state, the starter oil pressure threshold is a preset second pressure threshold. When the real-time oil pressure is greater than or equal to the second pressure threshold, the engine is started. When the real-time oil pressure is less than the second pressure threshold, the electric pre-supply pump (11) is started to raise the real-time oil pressure to the second pressure threshold. When the starting control state is a hot engine state, the starter oil pressure threshold is a preset third pressure threshold. When the real-time oil pressure is greater than or equal to the third pressure threshold, the engine is started. When the real-time oil pressure is less than the third pressure threshold, the electric pre-supply pump (11) is started to raise the real-time oil pressure to the third pressure threshold.

4. The intelligent pre-start control system for an engine according to claim 3, characterized in that, The first pressure threshold is 150 kPa, the second pressure threshold is 120 kPa, and the third pressure threshold is 100 kPa.

5. The intelligent pre-start control system for an engine according to claim 2, characterized in that, When the real-time temperature of the engine oil is less than a preset first temperature threshold, the starting control state is determined to be a cold start state. When the real-time temperature of the engine oil is greater than or equal to a preset second temperature threshold and less than or equal to a preset third temperature threshold, the starting control state is determined to be a cold-to-hot transition state. When the real-time temperature of the engine oil is greater than the third temperature threshold, the starting control state is determined to be the warm-up state.

6. The intelligent pre-start control system for an engine according to claim 5, characterized in that, The first temperature threshold is 30°C, the second temperature threshold is 40°C, and the third temperature threshold is 60°C.

Images