초록 ▼

A method and apparatus to estimate slopes accurately, as well as to eliminate slope estimation errors, taking error generating conditions into account. The slope on which the vehicle is running is estimated from the vehicle speed and the engine rpm value. The result is entered to the slope estimatio

A method and apparatus to estimate slopes accurately, as well as to eliminate slope estimation errors, taking error generating conditions into account. The slope on which the vehicle is running is estimated from the vehicle speed and the engine rpm value. The result is entered to the slope estimation unit through a low pass filter, then to the navigation unit. A noise eliminator is provided to the output of the slope estimation unit so that noises can be eliminated, for example, during gear-shifting or for a certain time after the gear shifting is completed by obtaining the "gear shifting" information from the automatic transmission control. The preceding estimated slope value is held during the noise elimination period.

대표청구항 ▼

[ We claim:] [1.] A process for generating an operating signal indicative of a slope of a surface on which a vehicle is supported, based on sensed operating parameters of said vehicle, a method of eliminating errors in said operating signal caused by noise, said process comprising:sensing at least o

[ We claim:] [1.] A process for generating an operating signal indicative of a slope of a surface on which a vehicle is supported, based on sensed operating parameters of said vehicle, a method of eliminating errors in said operating signal caused by noise, said process comprising:sensing at least one operating parameter of said vehicle which is indicative of slope of said surface, and generating output signals indicative thereof;processing said output signals in a data processor and generating said operating signal in response thereto;detecting occurrence of at least one predetermined condition which causes noise in said operating signal, and generating a noise suppression signal in response thereto; andduring existence of said noise suppression signal, maintaining said operating signal at a value thereof immediately prior to the generation of said noise suppression, until said noise suppression signal terminates.