Method for preventing engine limiting removal after vehicle speed sensor removal
A vehicle speed sensor and engine technology, applied in engine control, machine/engine, combustion engine, etc., can solve problems such as safety accidents, inability to limit vehicle speed, unresolved failures, etc., and achieve the effect of improving safety performance
Inactive Publication Date: 2020-08-28
ANHUI HUALING AUTOMOBILE
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Problems solved by technology
However, often many drivers will forcibly unplug the vehicle speed sensor when the vehicle has these faults and the speed is limited due to various reasons, so that the ECU cannot detect the vehicle speed, and the default vehicle speed is zero, so that the purpose of limiting the vehicle speed cannot be achieved. The situation is an extremely dangerous behavior. The driver guidance system cannot function, cannot limit the speed of the vehicle, and the fault has not been resolved, which may easily lead to safety accidents
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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0036] The core of the present invention is to provide a method for preventing engine restriction from being released after the vehicle speed sensor is removed. When the driver removes the vehicle speed sensor, the torque of the engine can still be limited to ensure that it will not be released due to the removal of the vehicle speed sensor. The restriction on the engine improves the safety performance of the engine and the vehicle.
[0037] Please refer to ...
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The invention discloses a method for preventing engine limiting removal after vehicle speed sensor removal. The method comprises the steps that firstly, vehicle speed reasonability is judged, and if vehicle speed reasonability faults happen, the second step is executed; and secondly, an engine is controlled to enter a torque limiting mode. Compared with the prior art, according to the provided method for preventing engine limiting removal after vehicle speed sensor removal, when vehicle speed reasonability faults happen, the engine can still enter the torque limiting mode, the output torque ofthe engine is limited, accordingly, the vehicle speed is limited, defects brought by vehicle speed sensor removal are overcome, it is ensured that limitation on the engine cannot be released even a vehicle speed sensor is removed, and the safety performance of the engine and a vehicle is improved.
Description
technical field [0001] The present invention relates to the technical field of vehicle control, and more particularly, to a method for preventing engine restriction from being released after removal of a vehicle speed sensor. Background technique [0002] Heavy-duty trucks are a very important means of transportation in today's society, occupying a large part of the total amount of social freight, and play an important role in the supply and demand of road transportation caused by macroeconomic factors such as industrialization process, industrial structure upgrading, and development area adjustment. Decisive role, so the demand is also increasing. [0003] The drivability limiting system includes a primary drivability limiting system and a severe drivability limiting system. When the vehicle has low urea liquid level, urea injection interruption fault, urea quality fault, urea consumption deviation (less than 50%) fault, EGR valve stuck fault, NOx control system related se...
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IPC IPC(8): F02D41/02F02D41/22F02D29/02
CPCF02D41/0215F02D41/22F02D29/02F02D31/001F02D2041/227F02D2200/101F02D2200/1002F02D2200/502F02D2200/501Y02T10/40
Inventor 阮建兵马明刘星星马永兵马昕卢成春于云丰
Owner ANHUI HUALING AUTOMOBILE