Throttle predictive controller in automatic engine tester

• US 5,195,038 A
• Filed: 06/05/1990
• Issued: 03/16/1993
• Est. Priority Date: 06/07/1989
• Status: Expired due to Term

• Current Assignee: ONO SOKKI (Thailand) Co. Ltd.
• Original Assignee: ONO SOKKI (Thailand) Co. Ltd.
• Inventors: Yagi, Hiroyuki, Hashizume, Takashi, Ishii, Youshi
• Primary Examiner(s): Lall, Parshotam S.
• Assistant Examiner(s): AUCHTERLONIE, THOMAS
• Application Number:
  US07/533,404
• Time in Patent Office: 1,015 Days
• Field of Search: 364/431.01, 364/431.03, 364/426.04, 364/425, 364/579, 364/580, 364/424.01, 364/424.1, 364/431.05, 364/550, 364/551.01, 73/117.1, 73/117.2, 73/117.3, 73/862.09, 73/862.13, 73/862.16, 73/862.18, 73/862.08, 73/116, 73/117, 73/123, 73/125-127 , 73/862.041, 73/865.9, 73/866.1, 73/866.2
• US Class Current: 73/114.36
• CPC Class Codes: G01M 15/044 by monitoring power, e.g. by operating the engine with one of the ignitions interrupted; by using acceleration tests
• CPC Class Codes: G01M 17/0072 the wheels of the vehicle co-operating with rotatable rolls G01M17/022, G01M17/045, G01M17/065 take precedence

Abstract

Throttle predictive controller in an engine tester includes an operation pattern generator (5); an operational processing unit (4) consisting of a throttle predictive angle calculation part (1), a throttle angle-corresponding to acceleration calculation part (2) and an adder (3); a dynamometer controller (6); a throttle amplifier (9); a throttle actuator (10); a dynamometer (11); and a tachometer (12). The operation pattern generator inputs a set revolution speed signal (n) to the throttle predictive angle calculation part, the throttle angle-corresponding to acceleration calculation part and the throttle amplifier, and inputs a set torque signal (T) to the throttle predictive angle calculation part and the dynamometer controller. The dynamometer controller controls dynamometer torque coupled to an output shaft S of an engine being tested, and is connected to a revolution pickup (12) for the shaft to input a dynamometer actual revolution speed signal during the operation of the engine; the dynamometer controller is further connected to input an actual dynamometer torque signal and a dynamometer actual revolution speed signal at the time of operation of the engine to the throttle predictive angle calculation part, and the throttle amplifier is connected to input the actual throttle angle signal to the throttle predictive angle calculation part which in the operational processing unit prepares a map on the basis of the actual number of revolutions, the actual torque and the actual throttle angle.

Claims

1. A throttle predictive controller in an engine tester, comprising:

an operation pattern generator;

an operational processing unit equipped with a throttle predictive angle calculation part;

a dynamometer controller;

a throttle amplifier;

a throttle actuator;

a dynamometer; and

a revolution pickup for detecting the speed of revolution of an output shaft on an engine being tested and emitting a signal in response to said speed;

said operation pattern generator being connected to input a set revolution speed signal to said throttle predictive angle calculation part and to said throttle amplifier, and to input a set torque signal to said throttle predictive angle calculation part and to said dynamometer controller;

said dynamometer controller being connected to said dynamometer for controlling a dynamometer torque for said dynamometer coupled to said output shaft of said engine, and said dynamometer controller being connected to said revolution pickup to receive a dynamometer actual revolution speed signal from said pickup at the time of operation of said engine;

said dynamometer controller being further connected to input an actual dynamometer torque signal and a dynamometer actual revolution speed signal at the time of operation of said engine to said throttle predictive angle calculation part;

said throttle amplifier being connected to input an actual throttle angle signal to said throttle predictive angle calculation part;

said throttle predictive angle calculation part preparing and storing a map based on said actual revolution speed, said actual torque and said actual throttle angle, and being further connected to input a throttle angle signal calculated from said map to said throttle amplifier;

said throttle amplifier being connected to input an amplification signal to said throttle actuator for actuating a throttle of said engine to an angle based on said inputted throttle angle signal from said throttle predictive angle calculation part; and

said throttle actuator being connected to said throttle of said engine.

2. A throttle predictive controller in an engine tester as claimed in claim 1, wherein said throttle amplifier further comprises:

an error correction controller for making error correction control for the difference between a set revolution speed and dynamometer actual revolution speed; and

an adder to which is inputted said dynamometer actual revolution speed signal and the correction throttle angle from said error correction controller for adding to said throttle angle.

3. A throttle predictive controller in an engine tester, comprising:

an operation pattern generator;

an operational processing unit comprising a throttle predictive angle calculation part, a throttle angle-corresponding to acceleration calculation part and an adder;

a dynamometer controller;

a throttle amplifier;

a throttle actuator;

a dynamometer; and

a revolution pickup for detecting the speed of revolution of an output shaft on an engine being tested and emitting a signal in response to said speed;

said operation pattern generator being connected to input a set revolution speed signal to said throttle predictive angle calculation part, to said throttle angle-corresponding to acceleration calculation part and to said throttle amplifier, and to input a set torque signal to said throttle predictive angle calculation part and to said dynamometer controller;

said dynamometer controller being connected to said dynamometer for controlling a dynamometer torque for said dynamometer coupled to said output shaft of said engine, and said dynamometer controller being connected to said revolution pickup for inputting an actual dynamometer signal and a dynamometer actual revolution speed signal at the time of operation of said engine to said throttle predictive angle calculation part;

said throttle amplifier being connected to input an actual throttle angle signal to said throttle predictive angle calculation part;

said throttle predictive angle calculation part preparing and storing a map on the basis of an actual revolution speed, an actual torque and an actual throttle angle;

said adder of said operational processing unit adding the throttle angle calculated from said map to the throttle angle calculated from a set revolution speed change component by said throttle angle-corresponding to acceleration calculation part to produce an added throttle angle signal, and being connected to input said added throttle angle signal to said throttle amplifier;

said throttle amplifier being connected to input an amplification signal to said throttle actuator for actuating a throttle of said engine to an angle based on said inputted added throttle angle signal; and

said throttle actuator being connected to said throttle of said engine.

4. A throttle predictive controller in an engine tester as claimed in claim 3, wherein said throttle amplifier further comprises:

an error correction controller for making error correction control for the difference between a set revolution speed and dynamometer actual revolution speed; and

an adder to which is inputted said dynamometer actual revolution speed signal and the correction throttle angle from said error correction controller for adding to said throttle angle.

6. A throttle predictive controller as claimed in claim 4, wherein said throttle amplifier further comprises:

an error correction controller for making error correction control for the difference between the set car speed and the actual car speed; and

an adder to which is inputted said actual car speed and the correction throttle angle from said error correction controller for adding to said throttle angle.

5. A throttle predictive controller in a tester for a car having an engine, comprising:

an operation pattern generator;

an operational processing unit equipped with a throttle predictive angle calculation part;

a car speed converter unit;

a throttle amplifier;

a change controller;

a change actuator;

a chassis dynamometer;

a throttle actuator; and

a revolution pickup for detecting car speed from the speed of revolution of a driving wheel of the car being tested on said chassis dynamometer and emitting a pulse signal in response to said speed;

said operation pattern generator being connected to input a set car speed signal to said throttle predictive angle calculation part and to said throttle amplifier, and to input a set change position signal to said throttle predictive angle calculation part and to said change controller;

said change controller being connected to said change actuator to control said change actuator on the basis of said set change position signal from said operation pattern generator;

said change actuator being connected to a transmission of a car being tested for actuating said transmission;

said revolution pickup detecting the car speed being connected to input said car speed pulse signal to said car speed converter unit;

said car speed converter unit being connected to input a car speed signal based on said car speed pulse signal to said throttle predictive angle calculation part;

said throttle amplifier being connected to input an actual throttle angle signal to said throttle predictive angle calculation part;

said throttle predictive angle calculation part calculating a throttle angle from an actual car speed, and actual throttle angle and said set change position signal, and preparing and storing a map on the basis of said calculation and being connected to input a throttle angle signal calculated from said map to said throttle amplifier;

said throttle amplifier being connected to input an amplification signal to said throttle actuator for actuating a throttle of an engine of said car being tested to an angle based on said inputted throttle angle signal; and

said throttle actuator being connected to said throttle of said engine.

7. A throttle predictive controller in a tester for a car having an engine, comprising:

an operation pattern generator;

an operational processing unit comprised of a throttle predictive angle calculation part, a throttle angle-corresponding to acceleration calculation part and an adder;

a car speed converter unit;

a throttle amplifier;

a change controller;

a chassis dynamometer;

a throttle actuator;

a change actuator; and

a revolution pickup for detecting car speed from the speed of revolution of a driving wheel of the car being tested on said chassis dynamometer and emitting a pulse signal in response to said speed;

said operation pattern generator being connected to input a set car speed signal to said throttle predictive angle calculation part, to said throttle angle-corresponding to acceleration calculation part and to said throttle amplifier and to input a set change position signal to said throttle predictive angle calculation part and to said change controller;

said change controller being connected to said change actuator to control said change actuator on the basis of said set change position signal from said operation pattern generator;

said change actuator being connected to a transmission of a car being tested for actuating said transmission;

said revolution pickup detecting the car speed being conencted to input said car speed pulse signal to said car speed converter unit;

said car speed converter unit being connected to input a car speed signal based on said car speed pulse signal to said throttle predictive angle calculation part;

said throttle amplifier being connected to input an actual throttle angle signal to said throttle predictive angle calculation part;

said throttle predictive angle calculation part calculating a throttle angle from an actual car speed, an actual throttle angle and said set change position signal and preparing and storing a map on the basis of said calculation;

said adder of said operational processing unit adding the throttle angle calculated from said map and the throttle angle calculated from a set car speed change component by said throttle angle-corresponding to acceleration calculation part to produce an added throttle angle signal, and being connected to input said added throttle angle signal to said throttle amplifier;

said throttle amplifier being connected to input an amplification signal to said throttle actuator for actuating a throttle of an engine of said car being tested to an angle based on said inputted added throttle angle signal; and

said throttle actuator being connected to said throttle of said engine of said car being tested.

8. A throttle predictive controller as claimed in claim 7, wherein said throttle amplifier further comprises:

an error correction controller for making error correction control for the difference between the set car speed and the actual car speed; and

an adder to which is inputted said actual car speed and the correction throttle angle from said error correction controller for adding to said throttle angle.