Travel-increasing control system of travel-increasing type electric automobile

A technology for electric vehicles and control systems, which is applied in electric vehicles, motor vehicles, control drives, etc., can solve the problems of high cost of control components, low combustion efficiency of the engine, and large volume, and achieves a simple control logic and maximized efficiency and cost. Effect

Active Publication Date: 2013-03-20
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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  • Travel-increasing control system of travel-increasing type electric automobile
  • Travel-increasing control system of travel-increasing type electric automobile
  • Travel-increasing control system of travel-increasing type electric automobile

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

The invention discloses a travel-increasing control system of a travel-increasing type electric automobile. An engine controller carries out dynamic control to the work of an oil injector and an ignition coil, and the engine controller calculates an external torque request according to a regulating torque, a reversed towing torque, a combusting torque and a target torque of an engine crankshaft of a current engine ahead of time and sends the external torque request to a travel-increasing controller. The travel-increasing controller and a generator or a motor response to the external torque request, engine rotating speed control is achieved through the balance control of the crankshaft torque, and the practical rotating speed output by the travel-increasing control system is in accordance with a target rotating speed. The travel-increasing control system of the travel-increasing type electric automobile can achieve the control to the rotating speed output by the travel-increasing control system without an electronic-control air damper, the engine can adopt a non-throttle air inlet mode, the control logic of the engine controller is simple, a single-cylinder or double-cylinder motorcycle engine controller and an economical engine controller can be used, and efficiency cost maximization can be achieved.

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 Applications(China)
IPC IPC(8): B60L11/02B60L11/18B60L15/00B60L50/10
CPCY02T10/7077Y02T10/7005B60L3/0023B60L15/20B60L50/62B60L2200/12B60L2240/421B60L2240/423B60L2240/441B60L2240/443B60L2240/445B60L2260/26B60L2270/12Y02T10/62Y02T10/64Y02T10/70Y02T10/72
Inventor 田良云汪斌卢万成徐鹏磊
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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