A vehicle operating condition engine adaptive system

Abstract

The invention discloses an engine self-adaptive system based on vehicle operation conditions, which comprises a GPS (global positioning system) navigation module, a vehicle operating data acquisition module, a whole vehicle parameter and engine working condition data storage module, a map data storage module, a data operation module, a decision-making module and a vehicle control module. The data operation module calculates a current operating state parameter of the vehicle according to vehicle operating data acquired by the vehicle operating data acquisition module and vehicle configuration parameters in the engine working condition data storage module; and then the decision-making module judges the whole vehicle dynamic requirement according to the current operating state parameter of the vehicle and the current section road information, and then acquires the corresponding engine operation parameter in the whole vehicle parameter and engine working condition data storage module, and execution is performed by the vehicle control module. According to the engine self-adaptive system based on the vehicle operation conditions, fuel saving efficacy is achieved through reasonable control of output characteristics of the engine under the premise of guarantee of vehicle dynamic property.

Description

technical field [0001] The present invention relates to the field of vehicle engine control, and more specifically relates to an engine adaptive system for vehicle operating conditions, which can reduce the fuel consumption of the vehicle without reducing the power of the vehicle by controlling the engine. effect. Background technique [0002] According to the dynamic response characteristics of the engine, when the throttle shows a steady change, the dynamic relationship between the engine torque and the speed is close to linear, and its curve is a curve that lags behind the change of the throttle; when the throttle shows a step change, the engine output The torque increases instantaneously, and the fuel injection volume of the engine suddenly increases with the change of the throttle. Since the engine speed and the supercharging system rise steadily, it cannot keep up with the change of the fuel injection volume. The test data shows that: under 100% throttle step, the air...

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Problems solved by technology

[0002] According to the dynamic response characteristics of the engine, when the throttle shows a steady change, the dynamic relationship between the engine torque and the speed is close to linear, and its curve is a curve that lags behind the change of the throttle; when the throttle shows a step change, the engine output The torque increases instantaneously, and the fuel injection volume of the engine suddenly increases with the change of the throttle. Since the engine speed and the booster system rise steadily, it cannot keep up with the change of the fuel injection volume.

The test data shows that under 100% throttle step, the air mixture in the cylinder is too rich within about 5 seconds, and there are problems such as incomplete fuel combustion, increased fuel consumption and poor emissions.

[0003] During the driving process of the vehicle, such as starting, accelerating, and shifting gears, the driver often presses the accelerator pedal in order to increase the speed as soon as possible, and then releases the accelerator pedal after the vehicle reaches the expected speed. Such an operation will lead to A large amount of fuel is discharged with the exhaust gas without burning completely, which increases the fuel consumption of the vehicle; moreover, due to the instantaneous increase of engine torque, overshooting is caused by too fast acceleration, so frequent braking and deceleration is required, which increases energy waste; The operation of the accelerator should be gentle, not sudden acceleration and sudden braking

[0004] In view of this, the inventor has made in-depth research on the defect of high fuel consumption caused by bad operation of the driver in the prior art, and this case has arisen

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