Method for limiting speed of electrojet low-speed vehicle

Abstract

The invention belongs to the technical field of vehicle control method, concretely relating to a speed limiting method for electric-jet low speed vehicle, adding speed control application-special logics in the original engine control unit ECU, i.e. respectively adding speed stage determining module, engine speed determining module and ignition angle regulating logic control module and setting three-stage target speed limit values and engine speed limit values in failure diagnosis module, mainly using speed signal as control target, and according to the comparative result of actual speed and target speed limit value, controlling oil jet module to cut off oil by cylinders to control the speed; and by regulating ignition advance angle, controlling ignition module to correct torsion impact produced before and after cutting off oil, and making oil cutoff and oil supply restoration as stable as possible. And the advantages: only modifying control logics of ECU to be able to implement speed control without adding any device, and the control is accurate and reliable, and when lower than limited speed, the vehicle has consistent performance with that of a nonlimited speed vehicle, and the speed limit value is convenient to modifying, and it is applied to different occasions.

Description

technical field [0001] The invention belongs to the technical field of vehicle control methods, and in particular relates to vehicle speed control technology. Background technique [0002] Some special occasions require low-speed vehicles, such as golf factories, factories, parks, etc., and the speed of vehicles needs to be limited. Because the demand is generally very small, it is difficult to recover the cost of this speed-limited car if it is developed. Therefore, it is a common method to convert ordinary models into low-speed vehicles. [0003] A common way to limit the speed of a vehicle is to increase the opening of the throttle or throttle by a mechanical limiting device to limit the opening of the throttle, causing the power of the engine to be limited, so that the speed of the vehicle can be limited. However, due to the limitation of the power of the engine, this method causes insufficient power when climbing a slope, and the speed of the vehicle can exceed the li...

AI Technical Summary

Problems solved by technology

[0003] The common way to limit the speed of the vehicle is to increase the mechanical limit device at the throttle or the accelerator to limit the opening of the throttle, resulting in the power of the engine being limited, so the speed of the vehicle can be limited

However, due to the limitation of the power of the engine in this method, the power is insufficient when climbing a slope, and the speed of the vehicle can exceed the limit speed when going downhill.

In addition, additional mechanical restraints will also lead to an increase in cost

Moreover, mechanical adjustment and matching are required when setting the target speed limit, which requires professional operation

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