US 4,393,695 AGranted

Manual shift system and method of use for vehicle testing

AssigneeLaboratory Equipment, Corp.

InventorsRichard A. Marshall, Edward F. Miller

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Abstract

A remote, manual shift system cooperating with the clutch, throttle and gear shift stick of a manual transmission vehicle for use during engine testing includes a series of five sensors, one each for vehicle speed, throttle position, clutch position, X-axis gear shift position and Y-axis gear shift position. These five sensors are operable to record and compile actual drive test data reflecting the actual operation of the vehicle during the test drive. This data is recorded and the recording is then processed by an electronics circuit which in turn provides actuating signals of a DC voltage level to a series of servos which are arranged in mechanical combination with the clutch, throttle and gear shift stick of the vehicle under test. As these various servos are actuated with an appropriate input signal, they perform the shifting from one gear to the next gear along with proper depression of the clutch and acceleration by means of the throttle. The use of actual test data from an actual road test provides a more reliable and improved data package for the operation of the servos and results in a more desirable vehicle test, such as might be performed on a dynamometer test station.

A remote, manual shift system cooperatively arranged with the clutch linkage and gear shift stick of a manual transmission vehicle for use during vehicle testing, said manual shift system comprising:

a manual transmission test vehicle;
means for generating a DC voltage signal;
a first sensor assembly coupled to the throttle linkage of said vehicle and suitably arranged to respond to throttle linkage movements;
a second sensor assembly coupled to the clutch linkage of said vehicle and suitably arranged to respond to clutch linkage movements;
a dual rotary sensor assembly coupled to the gear shift stick of said vehicle, said dual rotary sensor assembly suitably arranged to record the X-axis component of the movement of the gear shift stick by first sensor means and the Y-axis component of the movement of the gear shift stick by second sensor means, said dual rotary sensor assembly thereby providing real-time position information of the gear shift stick;
a clutch actuator subassembly mechanically coupled to the clutch linkage of said vehicle and suitably arranged to respond to a DC voltage signal from said generating means in order to move said clutch linkage;
a throttle actuator subassembly mechanically coupled to the throttle linkage of said vehicle and suitably arranged to respond to a DC voltage signal from said generating means to move said throttle linkage;
a gear shift actuator subassembly mechanically coupled to the gear shift stick of said vehicle and suitably arranged to respond to a DC voltage from said generating means signal to move said gear shift stick;
data recording and processing means electrically coupled to said first and second sensor assemblies and to said dual rotary sensor assembly;
and
said gear shift actuator subassembly including a DC drive system, a linkage arm and a ball screw assembly suitably arranged for converting rotary motions from said DC drive system into linear travel of said linkage arm, said DC drive system disposed within said vehicle and being suitably adapted to respond to data input signals from said data recording and processing means for duplicating the real-time position movements of said gear shift stick.

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Abstract

Claims6