Engine controlling system for vehicle
First Claim
1. An engine controlling system for a vehicle, comprising a running speed detecting means for detecting a running speed of said vehicle to develop a running speed detection signal, a running condition change-over means for alternatively developing one of a constant speed running designating signal which designates constant speed running as an aimed running condition of said vehicle and an accelerated running designating signal which designates accelerated running as the aimed running condition, an aimed speed setting means for setting, when the constant speed running designating signal is received, an aimed speed at which said vehicle should make constant speed running, an aimed acceleration setting means for setting, when the accelerated running designating signal is received, an aimed acceleration with which said vehicle should make accelerated running, an aimed torque calculating means for calculating, when the constant speed running designating signal is received, and aimed output torque of an engine of said vehicle in accordance with the aimed speed but calculating, when the accelerated running designating signal is received, an aimed output torque of said engine in accordance with the aimed acceleration, an engine rotational speed detecting means for detecting a speed of rotation of said engine to develop an engine rotational speed detection signal, a torque converter provided between said engine and a transmission, an engine output torque detecting means for developing, as a measured value of an output power of said engine, an output torque of said torque converter calculated from the engine rotational speed detection signal and a value preset in accordance with characteristics of said converter, an engine output adjusting means for adjusting the output power of said engine, a control amount setting means for setting a control amount of said engine output adjusting means so that the engine output torque detected by said engine output torque detecting means may be equal to the aimed torque, and an engine output controlling means for controlling said engine output adjusting means in accordance with the control amount.
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Accused Products
Abstract
An engine controlling system for a vehicle suitable for use with an automobile. When a running condition change-over means develops a constant speed running designating signal, an aimd torque calculating means calculates an aimed output torque of an engine of the vehicle in accordance with an aimed speed, but when the running condition change-over means develops an accelerated running designating signal, the aimed torque calculating means calculates an aimed output torque of the engine in accordance with an aimed acceleration. Meanwhile, an engine output torque detecting means calculates an output torque of a torque converter in accordance with characteristics of the torque converter and an engine rotational speed detection signal detected by an engine rotational speed detecting means and outputs the output torque as a measured value of the output power of the engine. A control amount setting means sets the control amount of an engine output adjusting means so that the engine output torque detected by the engine output torque detecting means may be equal to the aimed torque, and the engine output adjusting means adjusts the output of the engine by control of an engine output controlling means in accordance with the control amount.
58 Citations
8 Claims
- 1. An engine controlling system for a vehicle, comprising a running speed detecting means for detecting a running speed of said vehicle to develop a running speed detection signal, a running condition change-over means for alternatively developing one of a constant speed running designating signal which designates constant speed running as an aimed running condition of said vehicle and an accelerated running designating signal which designates accelerated running as the aimed running condition, an aimed speed setting means for setting, when the constant speed running designating signal is received, an aimed speed at which said vehicle should make constant speed running, an aimed acceleration setting means for setting, when the accelerated running designating signal is received, an aimed acceleration with which said vehicle should make accelerated running, an aimed torque calculating means for calculating, when the constant speed running designating signal is received, and aimed output torque of an engine of said vehicle in accordance with the aimed speed but calculating, when the accelerated running designating signal is received, an aimed output torque of said engine in accordance with the aimed acceleration, an engine rotational speed detecting means for detecting a speed of rotation of said engine to develop an engine rotational speed detection signal, a torque converter provided between said engine and a transmission, an engine output torque detecting means for developing, as a measured value of an output power of said engine, an output torque of said torque converter calculated from the engine rotational speed detection signal and a value preset in accordance with characteristics of said converter, an engine output adjusting means for adjusting the output power of said engine, a control amount setting means for setting a control amount of said engine output adjusting means so that the engine output torque detected by said engine output torque detecting means may be equal to the aimed torque, and an engine output controlling means for controlling said engine output adjusting means in accordance with the control amount.
Specification