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The range-extending control system of the extended-range electric vehicle

A technology of electric vehicles and control systems, applied in electric vehicles, motor vehicles, control drives, etc., can solve problems such as low engine combustion efficiency, high cost of control components, complex control functions, etc., to achieve maximum efficiency cost and simple control logic Effect

Active Publication Date: 2016-06-08
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The current range-extended control system of the extended-range electric vehicle uses a multi-cylinder engine, which is large in size and high in cost; it is necessary to use an electronically controlled throttle to control the intake air volume of the engine to control the engine speed to achieve the purpose of range-extended control. Gas throttling loss is large, engine combustion efficiency is low, and cost is high; and because automotive multi-cylinder engines and electronically controlled throttle valves require high-end engine controllers, the control functions are complicated, and the cost of control components is relatively high

Method used

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  • The range-extending control system of the extended-range electric vehicle
  • The range-extending control system of the extended-range electric vehicle
  • The range-extending control system of the extended-range electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 As shown, the range-extended control system of the extended-range electric vehicle includes an engine, a generator / motor, a range-extended controller, and an engine controller;

[0044] The crankshaft output of the engine is directly connected to the generator / motor;

[0045] The generator / motor can be used for electric drive and power generation, and integrates electric drive and power generation functions;

[0046] The range extender controller is used to send the engine operation demand signal B_enfirext to the engine controller, and after receiving the external torque demand sent by the engine controller, control the generator / motor to output the corresponding torque to the crankshaft of said engine;

[0047] The engine controller, when the engine operation demand signal sent by the range extender controller is true B_enfirext=TRUE, sends the fuel injection ignition signal B_enfire to the fuel injector and ignition coil to control the fuel injection ...

Embodiment 2

[0051] Based on Embodiment 1, if the extended-range controller receives the engine start demand command from the vehicle controller, it first controls the engine controller to be powered on, and controls the engine's oil pump assembly to pump oil to establish fuel injection pressure; Then according to the state of the fault state signal sent by the engine controller, send a true or false engine operation demand signal B_enfirext to the engine controller, and control the generator / motor to connect or disconnect with the power battery;

[0052] If the state of the fault state signal meets the operation requirements, then send the true engine operation demand signal B_enfirext=TRUE to the engine controller, and control the generator / motor to connect with the power battery, so that the generator / motor Running drags the engine to start; if the state of the fault state signal does not meet the operation requirements, then send a false engine operation demand signal B_enfirext=FALSE t...

Embodiment 3

[0062] Based on the range-extending control system of the extended-range electric vehicle of Embodiment 2, the engine controller sets the target speed of the engine, such as Figure 4 As shown, when the engine is started, the speed is gradually changed from 0 to the rated speed, when the engine is stopped, the rated speed is gradually changed to 0, when the engine is running stably, it is fixed at the rated speed, when the engine speed is higher than the first set speed when the engine is started, Only when the engine controller sends the fuel injection ignition permission signal B_enfire=TRUE to allow the fuel injection ignition, when the engine speed is lower than the second set speed when the engine is stopped, the engine controller sends the fuel injection ignition stop signal B_enfire=FALSE to stop the fuel injection ignition. When the engine is running stably, the target speed is a fixed value rated speed. The first set speed and the second set speed are greater than 0 ...

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Abstract

Disclosed is a range extension control system of a range extended electric vehicle, wherein the operation of a fuel injector and an ignition coil are controlled dynamically by an engine controller; according to a current adjustment torque (r1), dragging torque (r2) and combustion torque (r3) of the engine, and an engine crankshaft target torque (r4), the engine controller calculates an external torque request (r5) in advance and sends the torque request to a range extension controller; and in response to the external torque request (r5), the range extension controller and a generator / electric motor control the rotation speed of the engine by means of controlling the torque balance of the crank shaft such that the actual rotation speed output from the range extension control system is consistent with the target rotation speed. The range extension control system of the range extended electric vehicle is able to control the rotation speed output from the range extension control system without the help of an electronically-controlled throttle valve. The engine can adopt a throttleless intake mode, the control logic of the engine controller is simple, and the type of controller to be used can be that of a single-cylinder or dual-cylinder motorcycle engine or an economic engine so as to maximize the cost benefits.

Description

technical field [0001] The invention relates to electric vehicle technology, in particular to a range-extending control system for an extended-range electric vehicle. Background technique [0002] The drive motor is the only power device for pure electric vehicles. Due to the limitation of battery technology, the cruising range of pure electric vehicles is limited, and gasoline-electric hybrid technology can make up for this shortcoming. [0003] The ignition engine is used to charge the battery when the power is insufficient, but it is not used as a direct power output, and only meets the function of "extended range". This type of extended-range electric vehicle has a simple structure, low development cost, and good economy. more and more widely used. [0004] The current range-extended control system of the extended-range electric vehicle uses a high-end engine controller and an electronic throttle body to control the intake air volume of the engine, thereby controlling t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/02B60L11/18B60L15/00B60L50/10
CPCB60L3/0023B60L15/20B60L50/62B60L2200/12B60L2240/421B60L2240/423B60L2240/441B60L2240/443B60L2240/445B60L2260/26B60L2270/12Y02T10/62Y02T10/64Y02T10/70Y02T10/72
Inventor 田良云汪斌卢万成徐鹏磊
Owner UNITED AUTOMOTIVE ELECTRONICS SYST