diff --git a/app/service/OssService.php b/app/service/OssService.php
index 75dd524..21d4d1e 100644
--- a/app/service/OssService.php
+++ b/app/service/OssService.php
@@ -65,6 +65,14 @@ class OssService
     public function generatePrivateUrl($objectKey, $expireTime = 3600)
     {
         try {
+            // 验证参数
+            if (empty($objectKey)) {
+                throw new \InvalidArgumentException('ObjectKey cannot be empty');
+            }
+            if ($expireTime <= 0) {
+                throw new \InvalidArgumentException('ExpireTime must be greater than 0');
+            }
+
             // 记录更详细的调试信息
             error_log("OSS URL Generation Debug:");
             error_log("Bucket: " . $this->bucket);
@@ -75,6 +83,12 @@ class OssService
             error_log("AccessKeyId: " . substr($this->accessKeyId, 0, 4) . "****");
             error_log("Endpoint: " . $this->endpoint);
             
+            // 检查对象是否存在
+            if (!$this->ossClient->doesObjectExist($this->bucket, $objectKey)) {
+                error_log("OSS Object does not exist: " . $objectKey);
+                throw new \RuntimeException('Object does not exist in OSS');
+            }
+            
             // 生成 OSS 私有 URL
             $url = $this->ossClient->signUrl($this->bucket, $objectKey, $expireTime);
             
@@ -86,7 +100,12 @@ class OssService
             error_log("OSS Error: " . $e->getMessage());
             error_log("Error Code: " . $e->getCode());
             error_log("Error Trace: " . $e->getTraceAsString());
+            error_log("Request ID: " . $e->getRequestId());
             throw new \RuntimeException('OSS Error: ' . $e->getMessage());
+        } catch (\Exception $e) {
+            error_log("General Error in generatePrivateUrl: " . $e->getMessage());
+            error_log("Error Trace: " . $e->getTraceAsString());
+            throw new \RuntimeException('Error generating private URL: ' . $e->getMessage());
         }
     }
 }
\ No newline at end of file
diff --git a/plugin/admin/app/controller/VehicleController.php b/plugin/admin/app/controller/VehicleController.php
index 43919a5..3f738bd 100644
--- a/plugin/admin/app/controller/VehicleController.php
+++ b/plugin/admin/app/controller/VehicleController.php
@@ -140,7 +140,7 @@ class VehicleController extends Crud
                 try {
                     $ossservice = new OssService();
                     // 使用更短的过期时间（5分钟）
-                    $img_url = $ossservice->generatePrivateUrl($item['img_url'], 300);
+                    $img_url = $ossservice->generatePrivateUrl($item['img_url'], 86400);
                     Log::info("Vehicle image URL generation:", [
                         'original_url' => $item['img_url'],
                         'generated_url' => $img_url,