Method for setting the vehicle-engine torque

• US 4,917,063 A
• Filed: 05/27/1988
• Issued: 04/17/1990
• Est. Priority Date: 11/15/1985
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Komatsu Seisakusho
• Original Assignee: Kabushiki Kaisha Komatsu Seisakusho
• Inventors: Hiraki, Hikosaburo
• Primary Examiner(s): Wolfe, Willis R.
• Application Number:
  US07/199,638
• Time in Patent Office: 690 Days
• Field of Search: 123/357, 123/358, 123/359, 123/458, 123/419, 123/436
• US Class Current: 123/357
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 29/02 peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
• CPC Class Codes: F02D 41/1497 With detection of the mechanical response of the engine
• CPC Class Codes: F02D 41/38 of the high pressure type

Abstract

A method for setting the vehicle-engine torque comprises the step of: concentrating, in lower parts of operating ranges of engine speed of the engine, any of: operating ranges of engine speed of the engine, which ranges are determined by power output characteristics inherent in the engine; and the majority of operating ranges of engine torque. The method comprises the step of: selecting an acceleration torque set value at a time when acceleration conditions of a vehicle carrying the engine is detected by a detecting means, which acceleration torque set value is larger than a normal torque set value.

Claims

1. A method for setting vehicle-engine torque, comprising the steps of:

determining operating ranges of engine speed by power output characteristics in said engine, said operating ranges having lower portions;

concentrating, in said lower portions of said operating ranges of said engine speed, at least one of said operating ranges of engine speed, and a majority of operating ranges of engine torque; and

setting said vehicle-engine torque relative to said concentrated operating ranges of said engine speed.

2. The method for setting vehicle-engine torque as set forth in claim 1, further comprising the steps of:

detecting conditions by a detector for acceleration of a vehicle having said engine; and

selecting an acceleration torque set value at a time when acceleration conditions of said vehicle having said engine is detected by said detector, said acceleration torque set value being larger than a normal torque set value.

3. The method for setting vehicle-engine torque as set forth in claim 2, wherein said step of detecting conditions for vehicle accelerating includes the step of comparing engine speed value and set engine speed value.