POWER BRAKE UNIT FUNCTION
id041100100800
Function
• A 10-inch, single diaphragm type power brake unit has been adopted, achieving compatibility between high braking performance and excellent brake feeling. (except L3 Turbo)
• A tandem diaphragm type power brake unit has been adopted, achieving compatibility between high braking performance and excellent brake feeling. (L3 Turbo)
• With the adoption of a brake assist function for ABS and DSC equipped vehicles, brake system (including ABS during emergency braking) effectiveness has been further improved.
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― The brake assist function operates by aiding braking operation during emergency braking or other times when a high amount of brake power is required.
― Inexperienced drivers or drivers who panic during emergency braking may apply the brakes quickly but without sufficient force, or they may apply sufficient force but cannot maintain it for a continuous period. In these cases, the normal vehicle braking performance cannot exert sufficient force.
― The brake assist function determines, based on brake pedal depression speed and force, if emergency braking is occurring. If it occurs, the power brake unit applies maximum braking power.
• The structure of the brake assist function, built into the power brake unit, is simple and mechanical, to ensure a high level of reliability.
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Note
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• When the brake pedal is depressed, the following effects may be felt. These are normal effects of the brake assist operation and do not indicate an abnormality.
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― When the brake pedal is depressed strongly or depressed at higher speeds, the pedal will feel softer but the brakes will be applied strongly.
― When the brake pedal is depressed strongly or depressed at higher speeds, a clicking noise from the brake booster may be heard.
• The brake assist equipment does not supersede the functionality of the main braking system.
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Cross-sectional view
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Except L3 Turbo
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3
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Output characteristics
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4
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Output
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5
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Input
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6
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During brake assist operation
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7
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During normal braking
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8
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Operation characteristic (change according to pedal force)
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