AUTOMATIC STOP/RESTART DEVICE OF VEHICLE ENGINE
First Claim
1. An engine automatic stop/restart device for an engine of a vehicle, the vehicle having a drive wheel, and a transmission mechanism which transmits a creep force to the drive wheel according to a rotation of the engine, comprising, a motor for starting the engine, a sensor which detects if the transmission mechanism is in a drive range wherein the creep force is transmitted to the drive wheel, a sensor which detects that a brake pedal is depressed, and a microprocessor programmed to:
- stop the running of the engine automatically when the vehicle is stationary with the brake pedal depressed, determine whether a driver or a vehicle state requires a restart of the engine, restart the engine to increase a rotation speed of the engine rapidly by the motor when the driver requires the restart of the engine, and restart the engine to increase the rotation speed of the engine more slowly by the motor when the vehicle state requires the restart of the engine with the transmission mechanism in the drive range.
1 Assignment
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Accused Products
Abstract
When a restart of an engine is performed due to the requirement of a vehicle state unintended by a driver, a creep force which is initially generated is suppressed to a small value so that a vehicle is prevented from moving off.
When automatic stop conditions are satisfied, the engine 1 stops, and when restart conditions are satisfied, a starting motor 2 is started so as to restart an engine 1.
A condition for engine restart unintended by the driver is determined, and during a predetermined time when the engine restarts unintended by the driver, a smaller creep drive force is generated than when the engine restarts which is intended by the driver.
During this predetermined time, only the motor 2 is rotated without starting the engine, and the creep force is suppressed low.
39 Citations
13 Claims
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1. An engine automatic stop/restart device for an engine of a vehicle, the vehicle having a drive wheel, and a transmission mechanism which transmits a creep force to the drive wheel according to a rotation of the engine, comprising,
a motor for starting the engine, a sensor which detects if the transmission mechanism is in a drive range wherein the creep force is transmitted to the drive wheel, a sensor which detects that a brake pedal is depressed, and a microprocessor programmed to: -
stop the running of the engine automatically when the vehicle is stationary with the brake pedal depressed, determine whether a driver or a vehicle state requires a restart of the engine, restart the engine to increase a rotation speed of the engine rapidly by the motor when the driver requires the restart of the engine, and restart the engine to increase the rotation speed of the engine more slowly by the motor when the vehicle state requires the restart of the engine with the transmission mechanism in the drive range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An engine automatic stop/restart device for an engine of a vehicle, the vehicle having a drive wheel, and a transmission mechanism which transmits a creep force to the drive wheel according to a rotation of the engine, comprising,
means for detecting a drive range state of the transmission mechanism wherein the creep force is transmitted to the drive wheel, means for detecting a depression of a brake pedal means for stopping the running of the engine automatically when the vehicle is stationary with the brake pedal depressed, means for determining whether a driver or a vehicle state requires a restart of the engine, means for restarting the engine to increase a rotation speed of the engine rapidly by a motor when the driver requires the restart of the engine, and means for restarting the engine to increase the rotation speed of the engine more slowly by the motor when the vehicle state requires the restart of the engine with the transmission mechanism in the drive range.
Specification